TY  - JOUR
AU  - Ilić-Pajić, Jovana
AU  - Ivaniš, Gorica
AU  - Radović, Ivona
AU  - Grujić, Aleksandar
AU  - Stajić-Trošić, Jasna
AU  - Stijepović, Mirko
AU  - Kijevčanin, Mirjana
PY  - 2020
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/4474
AB  - In order to reduce negative influence of fossil fuels on environment, use of various renewable resources is highly promoted. Terpenes, naturally occurring in plants, can be added to petroleum fuel as its substitute up to a certain share. Thermodynamic properties of a fuel under high pressure and moderate temperature conditions are of significant importance for engine efficiency. This work reports density measurements of pure p-cymene, alpha-pinene, limonene and citral at temperatures (293.15-413.15) K and pressures (0.1-60) MPa, applying an Anton Paar DMA HP measuring cell. Density data were fitted by modified Tammann-Tait equation where the absolute average percentage deviation between measured and calculated densities was about 0.010%. The obtained parameters were used to estimate the isothermal compressibility, the isobaric thermal expansion coefficient, the internal pressure, and the difference between specific heat capacity at constant pressure and at constant volume. For examined compounds, all thermodynamic properties, except the internal pressure, decrease with pressure rise along an isotherm and increase as temperature increases at a constant pressure. The intersection point of isotherms for the isobaric thermal expansion coefficient for pure citral was registered at pressure 47 MPa, while for other analyzed terpenes the intersection point is above 60 MPa, outside the measurements pressure range.
PB  - Academic Press Ltd- Elsevier Science Ltd, London
T2  - Journal of Chemical Thermodynamics
T1  - Experimental densities and derived thermodynamic properties of pure p-cymene, alpha-pinene, limonene and citral under high pressure conditions
VL  - 144
DO  - 10.1016/j.jct.2020.106065
ER  - 

@article{
author = "Ilić-Pajić, Jovana and Ivaniš, Gorica and Radović, Ivona and Grujić, Aleksandar and Stajić-Trošić, Jasna and Stijepović, Mirko and Kijevčanin, Mirjana",
year = "2020",
abstract = "In order to reduce negative influence of fossil fuels on environment, use of various renewable resources is highly promoted. Terpenes, naturally occurring in plants, can be added to petroleum fuel as its substitute up to a certain share. Thermodynamic properties of a fuel under high pressure and moderate temperature conditions are of significant importance for engine efficiency. This work reports density measurements of pure p-cymene, alpha-pinene, limonene and citral at temperatures (293.15-413.15) K and pressures (0.1-60) MPa, applying an Anton Paar DMA HP measuring cell. Density data were fitted by modified Tammann-Tait equation where the absolute average percentage deviation between measured and calculated densities was about 0.010%. The obtained parameters were used to estimate the isothermal compressibility, the isobaric thermal expansion coefficient, the internal pressure, and the difference between specific heat capacity at constant pressure and at constant volume. For examined compounds, all thermodynamic properties, except the internal pressure, decrease with pressure rise along an isotherm and increase as temperature increases at a constant pressure. The intersection point of isotherms for the isobaric thermal expansion coefficient for pure citral was registered at pressure 47 MPa, while for other analyzed terpenes the intersection point is above 60 MPa, outside the measurements pressure range.",
publisher = "Academic Press Ltd- Elsevier Science Ltd, London",
journal = "Journal of Chemical Thermodynamics",
title = "Experimental densities and derived thermodynamic properties of pure p-cymene, alpha-pinene, limonene and citral under high pressure conditions",
volume = "144",
doi = "10.1016/j.jct.2020.106065"
}

Ilić-Pajić, J., Ivaniš, G., Radović, I., Grujić, A., Stajić-Trošić, J., Stijepović, M.,& Kijevčanin, M.. (2020). Experimental densities and derived thermodynamic properties of pure p-cymene, alpha-pinene, limonene and citral under high pressure conditions. in Journal of Chemical Thermodynamics
Academic Press Ltd- Elsevier Science Ltd, London., 144.
https://doi.org/10.1016/j.jct.2020.106065

Ilić-Pajić J, Ivaniš G, Radović I, Grujić A, Stajić-Trošić J, Stijepović M, Kijevčanin M. Experimental densities and derived thermodynamic properties of pure p-cymene, alpha-pinene, limonene and citral under high pressure conditions. in Journal of Chemical Thermodynamics. 2020;144.
doi:10.1016/j.jct.2020.106065 .

Ilić-Pajić, Jovana, Ivaniš, Gorica, Radović, Ivona, Grujić, Aleksandar, Stajić-Trošić, Jasna, Stijepović, Mirko, Kijevčanin, Mirjana, "Experimental densities and derived thermodynamic properties of pure p-cymene, alpha-pinene, limonene and citral under high pressure conditions" in Journal of Chemical Thermodynamics, 144 (2020),
https://doi.org/10.1016/j.jct.2020.106065 . .

TY  - JOUR
AU  - Perišić, Srđan
AU  - Vuksanović, Marija M.
AU  - Petrović, Miloš
AU  - Radisavljević, Anđela
AU  - Grujić, Aleksandar
AU  - Jančić-Heinemann, Radmila
AU  - Radojević, Vesna
PY  - 2019
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/4144
AB  - Hybrid composite panels of Wood-Plastic Composites (WPC) consisting of wood and poly (methyl methacrylate) (PMMA) were reinforced with alumina particles and made by "hot pressing" method. Alumina-based particles were made by sol-gel technique. The particles were characterized by the X-ray diffraction (XRD). The resulting alumina particles were modified with (3mercaptopropyl) trimethoxysilane (MPTMS), in order to obtain better mechanical properties of the composite relative to the composite with unmodified alumina particles. The aim of this work was to study the influence of composite structure and the moisture absorption on bending and the impact properties of the hybrid composite. The bending and impact tests revealed that modulus of elasticity and absorbed energy of deformation increased with modification of alumina and slightly decrease after moisture absorption.
PB  - Međunarodni Institut za nauku o sinterovanju, Beograd
T2  - Science of Sintering
T1  - Impact of Alumina Particles on the Morphology and Mechanics of Hybrid Wood Plastic Composite Materials
EP  - 124
IS  - 1
SP  - 115
VL  - 51
DO  - 10.2298/SOS1901115P
ER  - 

@article{
author = "Perišić, Srđan and Vuksanović, Marija M. and Petrović, Miloš and Radisavljević, Anđela and Grujić, Aleksandar and Jančić-Heinemann, Radmila and Radojević, Vesna",
year = "2019",
abstract = "Hybrid composite panels of Wood-Plastic Composites (WPC) consisting of wood and poly (methyl methacrylate) (PMMA) were reinforced with alumina particles and made by "hot pressing" method. Alumina-based particles were made by sol-gel technique. The particles were characterized by the X-ray diffraction (XRD). The resulting alumina particles were modified with (3mercaptopropyl) trimethoxysilane (MPTMS), in order to obtain better mechanical properties of the composite relative to the composite with unmodified alumina particles. The aim of this work was to study the influence of composite structure and the moisture absorption on bending and the impact properties of the hybrid composite. The bending and impact tests revealed that modulus of elasticity and absorbed energy of deformation increased with modification of alumina and slightly decrease after moisture absorption.",
publisher = "Međunarodni Institut za nauku o sinterovanju, Beograd",
journal = "Science of Sintering",
title = "Impact of Alumina Particles on the Morphology and Mechanics of Hybrid Wood Plastic Composite Materials",
pages = "124-115",
number = "1",
volume = "51",
doi = "10.2298/SOS1901115P"
}

Perišić, S., Vuksanović, M. M., Petrović, M., Radisavljević, A., Grujić, A., Jančić-Heinemann, R.,& Radojević, V.. (2019). Impact of Alumina Particles on the Morphology and Mechanics of Hybrid Wood Plastic Composite Materials. in Science of Sintering
Međunarodni Institut za nauku o sinterovanju, Beograd., 51(1), 115-124.
https://doi.org/10.2298/SOS1901115P

Perišić S, Vuksanović MM, Petrović M, Radisavljević A, Grujić A, Jančić-Heinemann R, Radojević V. Impact of Alumina Particles on the Morphology and Mechanics of Hybrid Wood Plastic Composite Materials. in Science of Sintering. 2019;51(1):115-124.
doi:10.2298/SOS1901115P .

Perišić, Srđan, Vuksanović, Marija M., Petrović, Miloš, Radisavljević, Anđela, Grujić, Aleksandar, Jančić-Heinemann, Radmila, Radojević, Vesna, "Impact of Alumina Particles on the Morphology and Mechanics of Hybrid Wood Plastic Composite Materials" in Science of Sintering, 51, no. 1 (2019):115-124,
https://doi.org/10.2298/SOS1901115P . .

TY  - JOUR
AU  - Stajčić, Aleksandar
AU  - Radović, Ivana
AU  - Ćosović, Vladan
AU  - Grujić, Aleksandar
AU  - Stajić-Trošić, Jasna
AU  - Jančić-Heinemann, Radmila
PY  - 2019
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/4131
AB  - This study presents preparation and characterization of ethyl cellulose based nanocomposites. Successful use of simple solvent casting technique provided nanocomposites with high loads of barium ferrite magnetic nanopowder in the polymer matrix, promising significant improvement of mechanical properties. Investigation of morphology revealed formation of agglomerates that are still on nanoscopic level. Nanocomposite thin films with a higher content of the magnetic powder showed substantial enhancement of break strength, elongation and microhardness compared to the pure ethyl cellulose, which was the primary aim of this research.
PB  - Međunarodni Institut za nauku o sinterovanju, Beograd
T2  - Science of Sintering
T1  - The Influence of Barium Ferrite Nanoparticles on Morphological and Mechanical Properties of Ethyl Cellulose Based Nanocomposites
EP  - 283
IS  - 3
SP  - 277
VL  - 51
DO  - 10.2298/SOS1903277S
ER  - 

@article{
author = "Stajčić, Aleksandar and Radović, Ivana and Ćosović, Vladan and Grujić, Aleksandar and Stajić-Trošić, Jasna and Jančić-Heinemann, Radmila",
year = "2019",
abstract = "This study presents preparation and characterization of ethyl cellulose based nanocomposites. Successful use of simple solvent casting technique provided nanocomposites with high loads of barium ferrite magnetic nanopowder in the polymer matrix, promising significant improvement of mechanical properties. Investigation of morphology revealed formation of agglomerates that are still on nanoscopic level. Nanocomposite thin films with a higher content of the magnetic powder showed substantial enhancement of break strength, elongation and microhardness compared to the pure ethyl cellulose, which was the primary aim of this research.",
publisher = "Međunarodni Institut za nauku o sinterovanju, Beograd",
journal = "Science of Sintering",
title = "The Influence of Barium Ferrite Nanoparticles on Morphological and Mechanical Properties of Ethyl Cellulose Based Nanocomposites",
pages = "283-277",
number = "3",
volume = "51",
doi = "10.2298/SOS1903277S"
}

Stajčić, A., Radović, I., Ćosović, V., Grujić, A., Stajić-Trošić, J.,& Jančić-Heinemann, R.. (2019). The Influence of Barium Ferrite Nanoparticles on Morphological and Mechanical Properties of Ethyl Cellulose Based Nanocomposites. in Science of Sintering
Međunarodni Institut za nauku o sinterovanju, Beograd., 51(3), 277-283.
https://doi.org/10.2298/SOS1903277S

Stajčić A, Radović I, Ćosović V, Grujić A, Stajić-Trošić J, Jančić-Heinemann R. The Influence of Barium Ferrite Nanoparticles on Morphological and Mechanical Properties of Ethyl Cellulose Based Nanocomposites. in Science of Sintering. 2019;51(3):277-283.
doi:10.2298/SOS1903277S .

Stajčić, Aleksandar, Radović, Ivana, Ćosović, Vladan, Grujić, Aleksandar, Stajić-Trošić, Jasna, Jančić-Heinemann, Radmila, "The Influence of Barium Ferrite Nanoparticles on Morphological and Mechanical Properties of Ethyl Cellulose Based Nanocomposites" in Science of Sintering, 51, no. 3 (2019):277-283,
https://doi.org/10.2298/SOS1903277S . .

TY  - JOUR
AU  - Stajčić, Aleksandar
AU  - Nedeljković, Dragutin
AU  - Panić, Vesna
AU  - Radović, Ivana
AU  - Grujić, Aleksandar
AU  - Stajić-Trošić, Jasna
AU  - Jančić-Heinemann, Radmila
PY  - 2018
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/3938
AB  - This study presents the route for preparation of the membrane-supporting materials with good mechanical behavior and adsorption properties that provide functionality and are easy to use in various environments. Polyethersulfone (PES) membrane-supported hydrogels were prepared via liquid phase inversion process with photopolymerization and monomer crosslinking. The obtained membranes had asymmetric structure containing dense skin on the top of a porous hydrogel as it is verified by scanning electron microscopy. Software analysis of the pore size revealed that fine pores enabled availability of the membrane active centers to metal cations. The membranes with a higher content of the polymer showed significantly improved mechanical properties compared with commonly used ion exchange membranes, which is crucial for the wastewater treatment application. Adsorption kinetics analysis showed that the hydrogel-rich bottom layer has significantly higher adsorption ability in comparison to the top layer. Adsorption kinetics of the bottom side was described by the first-order kinetics model, whereas for the the top side, phase-boundary controlled reaction model was used.
PB  - Desalination Publ, Hopkinton
T2  - Desalination and Water Treatment
T1  - Adsorption kinetics of polyethersulfone membrane-supported hydrogels
EP  - 49
SP  - 43
VL  - 131
DO  - 10.5004/dwt.2018.22959
ER  - 

@article{
author = "Stajčić, Aleksandar and Nedeljković, Dragutin and Panić, Vesna and Radović, Ivana and Grujić, Aleksandar and Stajić-Trošić, Jasna and Jančić-Heinemann, Radmila",
year = "2018",
abstract = "This study presents the route for preparation of the membrane-supporting materials with good mechanical behavior and adsorption properties that provide functionality and are easy to use in various environments. Polyethersulfone (PES) membrane-supported hydrogels were prepared via liquid phase inversion process with photopolymerization and monomer crosslinking. The obtained membranes had asymmetric structure containing dense skin on the top of a porous hydrogel as it is verified by scanning electron microscopy. Software analysis of the pore size revealed that fine pores enabled availability of the membrane active centers to metal cations. The membranes with a higher content of the polymer showed significantly improved mechanical properties compared with commonly used ion exchange membranes, which is crucial for the wastewater treatment application. Adsorption kinetics analysis showed that the hydrogel-rich bottom layer has significantly higher adsorption ability in comparison to the top layer. Adsorption kinetics of the bottom side was described by the first-order kinetics model, whereas for the the top side, phase-boundary controlled reaction model was used.",
publisher = "Desalination Publ, Hopkinton",
journal = "Desalination and Water Treatment",
title = "Adsorption kinetics of polyethersulfone membrane-supported hydrogels",
pages = "49-43",
volume = "131",
doi = "10.5004/dwt.2018.22959"
}

Stajčić, A., Nedeljković, D., Panić, V., Radović, I., Grujić, A., Stajić-Trošić, J.,& Jančić-Heinemann, R.. (2018). Adsorption kinetics of polyethersulfone membrane-supported hydrogels. in Desalination and Water Treatment
Desalination Publ, Hopkinton., 131, 43-49.
https://doi.org/10.5004/dwt.2018.22959

Stajčić A, Nedeljković D, Panić V, Radović I, Grujić A, Stajić-Trošić J, Jančić-Heinemann R. Adsorption kinetics of polyethersulfone membrane-supported hydrogels. in Desalination and Water Treatment. 2018;131:43-49.
doi:10.5004/dwt.2018.22959 .

Stajčić, Aleksandar, Nedeljković, Dragutin, Panić, Vesna, Radović, Ivana, Grujić, Aleksandar, Stajić-Trošić, Jasna, Jančić-Heinemann, Radmila, "Adsorption kinetics of polyethersulfone membrane-supported hydrogels" in Desalination and Water Treatment, 131 (2018):43-49,
https://doi.org/10.5004/dwt.2018.22959 . .

TY  - JOUR
AU  - Grujić, Aleksandar
AU  - Ćosović, Vladan
AU  - Stajić-Trošić, Jasna
AU  - Ćosović, Aleksandar
AU  - Stijepović, Mirko
AU  - Putić, Lana S.
AU  - Žák, Tomáš
PY  - 2018
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/3914
AB  - In this study, electrospinning combined with sol-gel technique is applied in order to produce magnetic nickel ferrite (Ni-ferrite) nanofibers. The prepared Ni-ferrite gel was mixed with poly(vinylpyrrolidone) (PVP) solution which was used as a spinning aid to enable spinnability of the mixture. Structural and morphological characteristics of the asspun ferrite gel/PVP composite web structure and calcinated Ni-ferrite nanofibers were analyzed using scanning electron microscopy (SEM). Phase composition analysis was carried out by Fourier-transform infrared (FT-IR) spectroscopy, X-Ray diffraction analysis (XRD) and Fe-57 Mossbauer spectroscopy (MS). The obtained results suggest that the pure nanocrystalline NiFe2O4 dense mat to the almost coral-like structure of fibers with diameters ranging from hundreds of nanometers to few micrometers was obtained. The results of MS analysis revealed the existence of a crystallite size distribution within the material as well as the existence of a superparamagnetic fraction with very small crystallite sizes ( lt 13nm). Magnetic behavior of the obtained material at elevated temperatures was also scrutinized using thermomagnetic measurements (TM) up to 800 degrees C.
PB  - Savez inženjera metalurgije Srbije, Beograd
T2  - Metallurgical & Materials Engineering
T1  - Synthesis of nife2o4 nanofibers by joint sol-gel and electrospinning technique
EP  - 180
IS  - 3
SP  - 173
VL  - 24
DO  - 10.30544/387
ER  - 

@article{
author = "Grujić, Aleksandar and Ćosović, Vladan and Stajić-Trošić, Jasna and Ćosović, Aleksandar and Stijepović, Mirko and Putić, Lana S. and Žák, Tomáš",
year = "2018",
abstract = "In this study, electrospinning combined with sol-gel technique is applied in order to produce magnetic nickel ferrite (Ni-ferrite) nanofibers. The prepared Ni-ferrite gel was mixed with poly(vinylpyrrolidone) (PVP) solution which was used as a spinning aid to enable spinnability of the mixture. Structural and morphological characteristics of the asspun ferrite gel/PVP composite web structure and calcinated Ni-ferrite nanofibers were analyzed using scanning electron microscopy (SEM). Phase composition analysis was carried out by Fourier-transform infrared (FT-IR) spectroscopy, X-Ray diffraction analysis (XRD) and Fe-57 Mossbauer spectroscopy (MS). The obtained results suggest that the pure nanocrystalline NiFe2O4 dense mat to the almost coral-like structure of fibers with diameters ranging from hundreds of nanometers to few micrometers was obtained. The results of MS analysis revealed the existence of a crystallite size distribution within the material as well as the existence of a superparamagnetic fraction with very small crystallite sizes ( lt 13nm). Magnetic behavior of the obtained material at elevated temperatures was also scrutinized using thermomagnetic measurements (TM) up to 800 degrees C.",
publisher = "Savez inženjera metalurgije Srbije, Beograd",
journal = "Metallurgical & Materials Engineering",
title = "Synthesis of nife2o4 nanofibers by joint sol-gel and electrospinning technique",
pages = "180-173",
number = "3",
volume = "24",
doi = "10.30544/387"
}

Grujić, A., Ćosović, V., Stajić-Trošić, J., Ćosović, A., Stijepović, M., Putić, L. S.,& Žák, T.. (2018). Synthesis of nife2o4 nanofibers by joint sol-gel and electrospinning technique. in Metallurgical & Materials Engineering
Savez inženjera metalurgije Srbije, Beograd., 24(3), 173-180.
https://doi.org/10.30544/387

Grujić A, Ćosović V, Stajić-Trošić J, Ćosović A, Stijepović M, Putić LS, Žák T. Synthesis of nife2o4 nanofibers by joint sol-gel and electrospinning technique. in Metallurgical & Materials Engineering. 2018;24(3):173-180.
doi:10.30544/387 .

Grujić, Aleksandar, Ćosović, Vladan, Stajić-Trošić, Jasna, Ćosović, Aleksandar, Stijepović, Mirko, Putić, Lana S., Žák, Tomáš, "Synthesis of nife2o4 nanofibers by joint sol-gel and electrospinning technique" in Metallurgical & Materials Engineering, 24, no. 3 (2018):173-180,
https://doi.org/10.30544/387 . .

TY  - JOUR
AU  - Polovina, Sasa
AU  - Vojtech, Merva
AU  - Dejanović, Igor
AU  - Grujić, Aleksandar
AU  - Stijepović, Mirko
PY  - 2018
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/4001
AB  - Continuous catalytic reforming (CCR) is known to convert refinery naphtha to a high-octane liquid product, also known as the reformate. In this paper, a First Principle Reaction Section Model for a CCR process is presented. Even though CCR is a well-established technology, the application of advanced, real-time optimization techniques that are able to quickly respond to any imposed changes onto the process, are necessary in the refinery business. This becomes particularly important as a result of changes in profit margin, changes in operating cost, and the introduction of new environmental legislations. Hence, we present a kinetic model for the CCR process using the so-called "lumped" concept. The reactors have been modeled using a quasi-steady-state approach. The unknown model parameters have been estimated by bench marking the First Principle Reaction Section results with a commercial CCR process owned by the Hungarian Oil and Gas Public Limited Company (INA-MOL). The proposed model has been tested and compared to data obtained from an existing CCR plant. The predictions of the model were found to be in good agreement with the experimental data. The relative absolute errors between the measured and model estimated variables have been found to be lower than 2%. The relative absolute error associated with the required fired heater duties were less than 1.0%. Simulating the reaction section of the CCR process requires less than 0.1 s of CPU time, which clearly indicates that this model can be very suitable for performing optimization studies. Moreover, this study shows that, although there is fluctuation in the composition of feedstock, the lumped kinetic approach was capable to predict the behavior of the CCR process well.
PB  - Amer Chemical Soc, Washington
T2  - Energy & Fuels
T1  - Modeling a Reaction Section of a Commercial Continuous Catalytic Reformer
EP  - 6396
IS  - 5
SP  - 6378
VL  - 32
DO  - 10.1021/acs.energyfuels.7b03897
ER  - 

@article{
author = "Polovina, Sasa and Vojtech, Merva and Dejanović, Igor and Grujić, Aleksandar and Stijepović, Mirko",
year = "2018",
abstract = "Continuous catalytic reforming (CCR) is known to convert refinery naphtha to a high-octane liquid product, also known as the reformate. In this paper, a First Principle Reaction Section Model for a CCR process is presented. Even though CCR is a well-established technology, the application of advanced, real-time optimization techniques that are able to quickly respond to any imposed changes onto the process, are necessary in the refinery business. This becomes particularly important as a result of changes in profit margin, changes in operating cost, and the introduction of new environmental legislations. Hence, we present a kinetic model for the CCR process using the so-called "lumped" concept. The reactors have been modeled using a quasi-steady-state approach. The unknown model parameters have been estimated by bench marking the First Principle Reaction Section results with a commercial CCR process owned by the Hungarian Oil and Gas Public Limited Company (INA-MOL). The proposed model has been tested and compared to data obtained from an existing CCR plant. The predictions of the model were found to be in good agreement with the experimental data. The relative absolute errors between the measured and model estimated variables have been found to be lower than 2%. The relative absolute error associated with the required fired heater duties were less than 1.0%. Simulating the reaction section of the CCR process requires less than 0.1 s of CPU time, which clearly indicates that this model can be very suitable for performing optimization studies. Moreover, this study shows that, although there is fluctuation in the composition of feedstock, the lumped kinetic approach was capable to predict the behavior of the CCR process well.",
publisher = "Amer Chemical Soc, Washington",
journal = "Energy & Fuels",
title = "Modeling a Reaction Section of a Commercial Continuous Catalytic Reformer",
pages = "6396-6378",
number = "5",
volume = "32",
doi = "10.1021/acs.energyfuels.7b03897"
}

Polovina, S., Vojtech, M., Dejanović, I., Grujić, A.,& Stijepović, M.. (2018). Modeling a Reaction Section of a Commercial Continuous Catalytic Reformer. in Energy & Fuels
Amer Chemical Soc, Washington., 32(5), 6378-6396.
https://doi.org/10.1021/acs.energyfuels.7b03897

Polovina S, Vojtech M, Dejanović I, Grujić A, Stijepović M. Modeling a Reaction Section of a Commercial Continuous Catalytic Reformer. in Energy & Fuels. 2018;32(5):6378-6396.
doi:10.1021/acs.energyfuels.7b03897 .

Polovina, Sasa, Vojtech, Merva, Dejanović, Igor, Grujić, Aleksandar, Stijepović, Mirko, "Modeling a Reaction Section of a Commercial Continuous Catalytic Reformer" in Energy & Fuels, 32, no. 5 (2018):6378-6396,
https://doi.org/10.1021/acs.energyfuels.7b03897 . .

TY  - JOUR
AU  - Grujić, Aleksandar
AU  - Stajić-Trošić, Jasna
AU  - Stijepović, Mirko
AU  - Perišić, Srđan
AU  - Žák, Tomáš
PY  - 2017
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/3523
AB  - The Nd-Fe-B-barium ferrite hybrid composite materials with epoxy matrix presented in this paper cover maximum energy product from 1 to 13 MGOe. Mixture of magnetic particles is responsible for high magnetic quality, while the thermosetting resin plays a role in mechanical properties. Samples with various ratio of Nd-Fe-B to barium ferrite in constant weight of epoxy resin are examined by tensile strength measurements. Magnetic measurements carried out by using vibrating sample magnetometer (VSM) show typical hysteresis loop. A structural analysis of composite surface is conducted by scanning electron microscope (SEM). Uniform particle distribution of plate shape Nd-Fe-B particles and spherical barium ferrite agglomerates is essential for both, mechanical and magnetic properties of composite materials. Fine particles are incorporated in-between larger particles in epoxy bulk which lead to improving the properties.
AB  - U ovom radu proučavani su hibridni Nd-Fe-B-barijum ferit kompozitni materijali sa epoksi matricom čiji se maksimani energetski proizvod kreće od 1 do 13 MGOe. Odlična magnetna svojstva kompozita potiču od smeše magnetnih čestica, dok termoočvršćavajući polimer ima uticaj na mehanička svojstva. Uzorci sa različitim odnosom udela Nd-Fe-B i barijum ferita u konstantnoj masi epoksi veziva su ispitivani na zateznu čvrstoću. Magnetna merenja vršena pomoću vibracionog magnetometra (VSM) pokazuju karakteristučnu histerezisnu petlju. Strukturnu analizu na površini kompozita sprovedena pomoću skenirajuće elektronske mikroskopije (SEM). Uniformna raspodela pločastih Nd-Fe-B čestica i sferičnih aglomerata barijum ferita je veoma značajna i za mehanička i za magnetna svojstva kompozitnih materijala. Sitne čestice su inkorporirane između velikih čestica u masi epoksida što dovodi do poboljšanja svojstava.
PB  - Engineering Society for Corrosion, Belgrade, Serbia
T2  - Zaštita materijala
T1  - Tensile strength properties of hybrid magnetic composite materials
T1  - Zatezna čvrstoća hibridnih magnetnih kompozitnih materijala
EP  - 575
IS  - 4
SP  - 570
VL  - 58
DO  - 10.5937/ZasMat1704570G
ER  - 

@article{
author = "Grujić, Aleksandar and Stajić-Trošić, Jasna and Stijepović, Mirko and Perišić, Srđan and Žák, Tomáš",
year = "2017",
abstract = "The Nd-Fe-B-barium ferrite hybrid composite materials with epoxy matrix presented in this paper cover maximum energy product from 1 to 13 MGOe. Mixture of magnetic particles is responsible for high magnetic quality, while the thermosetting resin plays a role in mechanical properties. Samples with various ratio of Nd-Fe-B to barium ferrite in constant weight of epoxy resin are examined by tensile strength measurements. Magnetic measurements carried out by using vibrating sample magnetometer (VSM) show typical hysteresis loop. A structural analysis of composite surface is conducted by scanning electron microscope (SEM). Uniform particle distribution of plate shape Nd-Fe-B particles and spherical barium ferrite agglomerates is essential for both, mechanical and magnetic properties of composite materials. Fine particles are incorporated in-between larger particles in epoxy bulk which lead to improving the properties., U ovom radu proučavani su hibridni Nd-Fe-B-barijum ferit kompozitni materijali sa epoksi matricom čiji se maksimani energetski proizvod kreće od 1 do 13 MGOe. Odlična magnetna svojstva kompozita potiču od smeše magnetnih čestica, dok termoočvršćavajući polimer ima uticaj na mehanička svojstva. Uzorci sa različitim odnosom udela Nd-Fe-B i barijum ferita u konstantnoj masi epoksi veziva su ispitivani na zateznu čvrstoću. Magnetna merenja vršena pomoću vibracionog magnetometra (VSM) pokazuju karakteristučnu histerezisnu petlju. Strukturnu analizu na površini kompozita sprovedena pomoću skenirajuće elektronske mikroskopije (SEM). Uniformna raspodela pločastih Nd-Fe-B čestica i sferičnih aglomerata barijum ferita je veoma značajna i za mehanička i za magnetna svojstva kompozitnih materijala. Sitne čestice su inkorporirane između velikih čestica u masi epoksida što dovodi do poboljšanja svojstava.",
publisher = "Engineering Society for Corrosion, Belgrade, Serbia",
journal = "Zaštita materijala",
title = "Tensile strength properties of hybrid magnetic composite materials, Zatezna čvrstoća hibridnih magnetnih kompozitnih materijala",
pages = "575-570",
number = "4",
volume = "58",
doi = "10.5937/ZasMat1704570G"
}

Grujić, A., Stajić-Trošić, J., Stijepović, M., Perišić, S.,& Žák, T.. (2017). Tensile strength properties of hybrid magnetic composite materials. in Zaštita materijala
Engineering Society for Corrosion, Belgrade, Serbia., 58(4), 570-575.
https://doi.org/10.5937/ZasMat1704570G

Grujić A, Stajić-Trošić J, Stijepović M, Perišić S, Žák T. Tensile strength properties of hybrid magnetic composite materials. in Zaštita materijala. 2017;58(4):570-575.
doi:10.5937/ZasMat1704570G .

Grujić, Aleksandar, Stajić-Trošić, Jasna, Stijepović, Mirko, Perišić, Srđan, Žák, Tomáš, "Tensile strength properties of hybrid magnetic composite materials" in Zaštita materijala, 58, no. 4 (2017):570-575,
https://doi.org/10.5937/ZasMat1704570G . .

TY  - JOUR
AU  - Stijepović, Mirko
AU  - Papadopoulos, Athanasios I.
AU  - Linke, Patrick
AU  - Stijepović, Vladimir
AU  - Grujić, Aleksandar
AU  - Kijevčanin, Mirjana
AU  - Seferlis, Panos
PY  - 2017
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/3605
AB  - We propose a systematic model for the optimum design of Organic Rankine Cycles (ORC) used for power generation from multiple heat sources available at different temperatures. The model enables the automated generation of inclusive and flexible ORC cascades and is optimized using a global optimization algorithm. Design parameters include the number of ORC cascades, the shared structure of the heat exchanger network, the operating conditions and the working fluid used in each cascade in order to identify an overall ORC structure that maximizes the power output. Results indicate significant operating improvements from using a double ORC cascade with different working fluids.
PB  - Elsevier Science Bv, Amsterdam
T2  - 27th European Symposium on Computer Aided Process Engineering, Pt A
T1  - Targeting and Design of Organic Rankine Cycle Systems for Multiple Heat Sources with Simultaneous Working Fluid Selection
EP  - 774
SP  - 769
VL  - 40A
DO  - 10.1016/B978-0-444-63965-3.50130-6
ER  - 

@article{
author = "Stijepović, Mirko and Papadopoulos, Athanasios I. and Linke, Patrick and Stijepović, Vladimir and Grujić, Aleksandar and Kijevčanin, Mirjana and Seferlis, Panos",
year = "2017",
abstract = "We propose a systematic model for the optimum design of Organic Rankine Cycles (ORC) used for power generation from multiple heat sources available at different temperatures. The model enables the automated generation of inclusive and flexible ORC cascades and is optimized using a global optimization algorithm. Design parameters include the number of ORC cascades, the shared structure of the heat exchanger network, the operating conditions and the working fluid used in each cascade in order to identify an overall ORC structure that maximizes the power output. Results indicate significant operating improvements from using a double ORC cascade with different working fluids.",
publisher = "Elsevier Science Bv, Amsterdam",
journal = "27th European Symposium on Computer Aided Process Engineering, Pt A",
title = "Targeting and Design of Organic Rankine Cycle Systems for Multiple Heat Sources with Simultaneous Working Fluid Selection",
pages = "774-769",
volume = "40A",
doi = "10.1016/B978-0-444-63965-3.50130-6"
}

Stijepović, M., Papadopoulos, A. I., Linke, P., Stijepović, V., Grujić, A., Kijevčanin, M.,& Seferlis, P.. (2017). Targeting and Design of Organic Rankine Cycle Systems for Multiple Heat Sources with Simultaneous Working Fluid Selection. in 27th European Symposium on Computer Aided Process Engineering, Pt A
Elsevier Science Bv, Amsterdam., 40A, 769-774.
https://doi.org/10.1016/B978-0-444-63965-3.50130-6

Stijepović M, Papadopoulos AI, Linke P, Stijepović V, Grujić A, Kijevčanin M, Seferlis P. Targeting and Design of Organic Rankine Cycle Systems for Multiple Heat Sources with Simultaneous Working Fluid Selection. in 27th European Symposium on Computer Aided Process Engineering, Pt A. 2017;40A:769-774.
doi:10.1016/B978-0-444-63965-3.50130-6 .

Stijepović, Mirko, Papadopoulos, Athanasios I., Linke, Patrick, Stijepović, Vladimir, Grujić, Aleksandar, Kijevčanin, Mirjana, Seferlis, Panos, "Targeting and Design of Organic Rankine Cycle Systems for Multiple Heat Sources with Simultaneous Working Fluid Selection" in 27th European Symposium on Computer Aided Process Engineering, Pt A, 40A (2017):769-774,
https://doi.org/10.1016/B978-0-444-63965-3.50130-6 . .

TY  - JOUR
AU  - Stijepović, Mirko
AU  - Papadopoulos, Athanasios I.
AU  - Linke, Patrick
AU  - Stijepović, Vladimir
AU  - Grujić, Aleksandar
AU  - Kijevčanin, Mirjana
AU  - Seferlis, Panos
PY  - 2017
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/3735
AB  - This work presents a systematic approach toward the design of Organic Rankine Cycles (ORC) for the generation of power from multiple heat sources available at different temperature levels. The design problem is approached in a mixed-integer non-linear programming (MINLP) formulation where an inclusive and flexible ORC model is automatically evolved by a deterministic algorithm for global optimization. The basic building block of the model is the ORC cascade which consists of a heat extraction, a power generation, a condensation and a liquid pressurization section. The aim of the optimization is to determine the optimum number of ORC cascades, the structure of the heat exchanger network shared among different cascades, the operating conditions and the working fluid used in each cascade in order to identify an overall ORC structure that maximizes the power output. The approach is illustrated through a case study which indicates that a system of two waste heat sources is best exploited through two interconnected ORC utilizing different working fluids.
PB  - Elsevier Sci Ltd, Oxford
T2  - Journal of Cleaner Production
T1  - Organic Rankine Cycle system performance targeting and design for multiple heat sources with simultaneous working fluid selection
EP  - 1970
SP  - 1950
VL  - 142
DO  - 10.1016/j.jclepro.2016.11.088
ER  - 

@article{
author = "Stijepović, Mirko and Papadopoulos, Athanasios I. and Linke, Patrick and Stijepović, Vladimir and Grujić, Aleksandar and Kijevčanin, Mirjana and Seferlis, Panos",
year = "2017",
abstract = "This work presents a systematic approach toward the design of Organic Rankine Cycles (ORC) for the generation of power from multiple heat sources available at different temperature levels. The design problem is approached in a mixed-integer non-linear programming (MINLP) formulation where an inclusive and flexible ORC model is automatically evolved by a deterministic algorithm for global optimization. The basic building block of the model is the ORC cascade which consists of a heat extraction, a power generation, a condensation and a liquid pressurization section. The aim of the optimization is to determine the optimum number of ORC cascades, the structure of the heat exchanger network shared among different cascades, the operating conditions and the working fluid used in each cascade in order to identify an overall ORC structure that maximizes the power output. The approach is illustrated through a case study which indicates that a system of two waste heat sources is best exploited through two interconnected ORC utilizing different working fluids.",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "Journal of Cleaner Production",
title = "Organic Rankine Cycle system performance targeting and design for multiple heat sources with simultaneous working fluid selection",
pages = "1970-1950",
volume = "142",
doi = "10.1016/j.jclepro.2016.11.088"
}

Stijepović, M., Papadopoulos, A. I., Linke, P., Stijepović, V., Grujić, A., Kijevčanin, M.,& Seferlis, P.. (2017). Organic Rankine Cycle system performance targeting and design for multiple heat sources with simultaneous working fluid selection. in Journal of Cleaner Production
Elsevier Sci Ltd, Oxford., 142, 1950-1970.
https://doi.org/10.1016/j.jclepro.2016.11.088

Stijepović M, Papadopoulos AI, Linke P, Stijepović V, Grujić A, Kijevčanin M, Seferlis P. Organic Rankine Cycle system performance targeting and design for multiple heat sources with simultaneous working fluid selection. in Journal of Cleaner Production. 2017;142:1950-1970.
doi:10.1016/j.jclepro.2016.11.088 .

Stijepović, Mirko, Papadopoulos, Athanasios I., Linke, Patrick, Stijepović, Vladimir, Grujić, Aleksandar, Kijevčanin, Mirjana, Seferlis, Panos, "Organic Rankine Cycle system performance targeting and design for multiple heat sources with simultaneous working fluid selection" in Journal of Cleaner Production, 142 (2017):1950-1970,
https://doi.org/10.1016/j.jclepro.2016.11.088 . .

TY  - JOUR
AU  - Ilić, Jovana M.
AU  - Grujić, Aleksandar
AU  - Stijepović, Mirko
AU  - Stajić-Trošić, Jasna
AU  - Bugarski, Branko
PY  - 2015
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2906
AB  - The aim of this paper is to obtain microbeads of natural polymers such as alginate and chitosan. These microbeads were used as potential carriers for the active ingredients so that in this study the diffusion of various substances from them is analyzed. Alginate microbeads were obtained by electrostatic droplet method. In the resulting microbeads was performed absorption of three tracer indicators with different molecular weight (acridine orange, blue dextran, methylene blue). The goal of the experiment is to monitor indicators release kinetics from microbeads. Based on these measurements the layoffs curve should give an answer on the impact of the molecular size of the three indicators on the diffusion rate of microbeads. In order to achieve the slow release of indicators alginate microbeads were coated with chitosan. Chitosan has an impact on reducing the porosity of gel, which further led to lower release tracer indicators of microbeads. Comparative analysis of the obtained layoffs curves answers about the impact on the process of obtaining micro diffusion rate indicator.
AB  - U ovom radu je prikazan proces sinteze mikročestica od prirodnih polimera, alginata i hitozana, kao i neka njihova svojstva. Osnovna primena ovih mikročestica je da se koriste kao potencijalni nosači za aktivne supstance. U tom smislu je ispitivana i difuzija različitih supstanci iz njih. Na alginatne mikročestice dobijene metodom elektrostatičke ekstruzije vršena je apsorpcija tri trejserska indikatora sa različitim molekulskim masama: akridin oranž, plavi dekstran i metilensko plavo. Praćenjem kinetike otpuštanja indikatora iz mikročestica konstruisane su krive otpuštanja koje daju informaciju o uticaju veličine molekula svakog od indikatora na brzinu difuzije iz mikročestica. Da bi se postiglo što sporije otpuštanje indikatora alginatne mikročestice su oblagane hitozanom. Hitozan ima uticaj na smanjenje poroznosti gela, što dovodi do sporijeg otpuštanja trejsersikh indikatora iz mikročestica. Uporedna analiza dobijenih krivih otpuštanja daje odgovor o uticaju postupka dobijanja mikročestica na brzinu difuzije indikatora.
PB  - Savez inženjera i tehničara Srbije, Beograd
T2  - Tehnika
T1  - Effect of tracers molecular weight on the release process from alginate microbeads
T1  - Uticaj molekulske mase trejserskih indikatora na kontrolisano otpuštanje iz alginatnih mikročestica
EP  - 405
IS  - 3
SP  - 401
VL  - 70
DO  - 10.5937/tehnika1503401I
ER  - 

@article{
author = "Ilić, Jovana M. and Grujić, Aleksandar and Stijepović, Mirko and Stajić-Trošić, Jasna and Bugarski, Branko",
year = "2015",
abstract = "The aim of this paper is to obtain microbeads of natural polymers such as alginate and chitosan. These microbeads were used as potential carriers for the active ingredients so that in this study the diffusion of various substances from them is analyzed. Alginate microbeads were obtained by electrostatic droplet method. In the resulting microbeads was performed absorption of three tracer indicators with different molecular weight (acridine orange, blue dextran, methylene blue). The goal of the experiment is to monitor indicators release kinetics from microbeads. Based on these measurements the layoffs curve should give an answer on the impact of the molecular size of the three indicators on the diffusion rate of microbeads. In order to achieve the slow release of indicators alginate microbeads were coated with chitosan. Chitosan has an impact on reducing the porosity of gel, which further led to lower release tracer indicators of microbeads. Comparative analysis of the obtained layoffs curves answers about the impact on the process of obtaining micro diffusion rate indicator., U ovom radu je prikazan proces sinteze mikročestica od prirodnih polimera, alginata i hitozana, kao i neka njihova svojstva. Osnovna primena ovih mikročestica je da se koriste kao potencijalni nosači za aktivne supstance. U tom smislu je ispitivana i difuzija različitih supstanci iz njih. Na alginatne mikročestice dobijene metodom elektrostatičke ekstruzije vršena je apsorpcija tri trejserska indikatora sa različitim molekulskim masama: akridin oranž, plavi dekstran i metilensko plavo. Praćenjem kinetike otpuštanja indikatora iz mikročestica konstruisane su krive otpuštanja koje daju informaciju o uticaju veličine molekula svakog od indikatora na brzinu difuzije iz mikročestica. Da bi se postiglo što sporije otpuštanje indikatora alginatne mikročestice su oblagane hitozanom. Hitozan ima uticaj na smanjenje poroznosti gela, što dovodi do sporijeg otpuštanja trejsersikh indikatora iz mikročestica. Uporedna analiza dobijenih krivih otpuštanja daje odgovor o uticaju postupka dobijanja mikročestica na brzinu difuzije indikatora.",
publisher = "Savez inženjera i tehničara Srbije, Beograd",
journal = "Tehnika",
title = "Effect of tracers molecular weight on the release process from alginate microbeads, Uticaj molekulske mase trejserskih indikatora na kontrolisano otpuštanje iz alginatnih mikročestica",
pages = "405-401",
number = "3",
volume = "70",
doi = "10.5937/tehnika1503401I"
}

Ilić, J. M., Grujić, A., Stijepović, M., Stajić-Trošić, J.,& Bugarski, B.. (2015). Effect of tracers molecular weight on the release process from alginate microbeads. in Tehnika
Savez inženjera i tehničara Srbije, Beograd., 70(3), 401-405.
https://doi.org/10.5937/tehnika1503401I

Ilić JM, Grujić A, Stijepović M, Stajić-Trošić J, Bugarski B. Effect of tracers molecular weight on the release process from alginate microbeads. in Tehnika. 2015;70(3):401-405.
doi:10.5937/tehnika1503401I .

Ilić, Jovana M., Grujić, Aleksandar, Stijepović, Mirko, Stajić-Trošić, Jasna, Bugarski, Branko, "Effect of tracers molecular weight on the release process from alginate microbeads" in Tehnika, 70, no. 3 (2015):401-405,
https://doi.org/10.5937/tehnika1503401I . .

TY  - JOUR
AU  - Nedeljković, Dragutin
AU  - Stevanović, Marija P.
AU  - Stijepović, Mirko
AU  - Stajčić, Aleksandar
AU  - Grujić, Aleksandar
AU  - Stajić-Trošić, Jasna
AU  - Stevanović, Jasmina
PY  - 2015
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/3063
AB  - The aim of this study was to construct a polymer-based mixed matrix membrane that could be used for waste gases treatment. Therefore, high permeability for the carbon dioxide and low permeability for other gases commonly present in the industrial combustion waste gases (nitrogen, oxygen, hydrogen and methane) are essential. These membranes belong to the group of dense composite membranes, whose separation is based on the solutiondiffusion mechanism. In this paper, feasibility of the application of poly(ethylene oxide)-copoly(phtalamide) was tested. In order to enhance the permeability of carbon dioxide, three different zeolites with two-dimensional pores (IHW, NS/ and TER) were incorporated, and in order to improve compatibility between the inorganic particles and polymer chains, n-tetradecyldimethylamonium bromide (NTAB) was added. The best results in carbon dioxide/hydrogen selectivity were obtained with the membrane constructed with PEBAX 1657 and surface treated zeolites, while better results concerning selectivity were gained with membranes based on Polyactive.
PB  - Savez hemijskih inženjera, Beograd
T2  - Chemical Industry & Chemical Engineering Quarterly
T1  - The possibility of application of zeolyte powders for the construction of membranes for carbon dioxide separation
EP  - 284
IS  - 2
SP  - 277
VL  - 21
DO  - 10.2298/CICEQ130924025N
ER  - 

@article{
author = "Nedeljković, Dragutin and Stevanović, Marija P. and Stijepović, Mirko and Stajčić, Aleksandar and Grujić, Aleksandar and Stajić-Trošić, Jasna and Stevanović, Jasmina",
year = "2015",
abstract = "The aim of this study was to construct a polymer-based mixed matrix membrane that could be used for waste gases treatment. Therefore, high permeability for the carbon dioxide and low permeability for other gases commonly present in the industrial combustion waste gases (nitrogen, oxygen, hydrogen and methane) are essential. These membranes belong to the group of dense composite membranes, whose separation is based on the solutiondiffusion mechanism. In this paper, feasibility of the application of poly(ethylene oxide)-copoly(phtalamide) was tested. In order to enhance the permeability of carbon dioxide, three different zeolites with two-dimensional pores (IHW, NS/ and TER) were incorporated, and in order to improve compatibility between the inorganic particles and polymer chains, n-tetradecyldimethylamonium bromide (NTAB) was added. The best results in carbon dioxide/hydrogen selectivity were obtained with the membrane constructed with PEBAX 1657 and surface treated zeolites, while better results concerning selectivity were gained with membranes based on Polyactive.",
publisher = "Savez hemijskih inženjera, Beograd",
journal = "Chemical Industry & Chemical Engineering Quarterly",
title = "The possibility of application of zeolyte powders for the construction of membranes for carbon dioxide separation",
pages = "284-277",
number = "2",
volume = "21",
doi = "10.2298/CICEQ130924025N"
}

Nedeljković, D., Stevanović, M. P., Stijepović, M., Stajčić, A., Grujić, A., Stajić-Trošić, J.,& Stevanović, J.. (2015). The possibility of application of zeolyte powders for the construction of membranes for carbon dioxide separation. in Chemical Industry & Chemical Engineering Quarterly
Savez hemijskih inženjera, Beograd., 21(2), 277-284.
https://doi.org/10.2298/CICEQ130924025N

Nedeljković D, Stevanović MP, Stijepović M, Stajčić A, Grujić A, Stajić-Trošić J, Stevanović J. The possibility of application of zeolyte powders for the construction of membranes for carbon dioxide separation. in Chemical Industry & Chemical Engineering Quarterly. 2015;21(2):277-284.
doi:10.2298/CICEQ130924025N .

Nedeljković, Dragutin, Stevanović, Marija P., Stijepović, Mirko, Stajčić, Aleksandar, Grujić, Aleksandar, Stajić-Trošić, Jasna, Stevanović, Jasmina, "The possibility of application of zeolyte powders for the construction of membranes for carbon dioxide separation" in Chemical Industry & Chemical Engineering Quarterly, 21, no. 2 (2015):277-284,
https://doi.org/10.2298/CICEQ130924025N . .

TY  - JOUR
AU  - El Swie, H.
AU  - Radojević, Vesna
AU  - Brajović, Ljiljana
AU  - Stajić-Trošić, Jasna
AU  - Ćosović, Vladan
AU  - Grujić, Aleksandar
AU  - Aleksić, Radoslav
PY  - 2015
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/3084
AB  - The commercial multi-mode optical fiber was coated with magnetic composite material prepared using Nd-Fe-B permanent magnet powder dispersed in poly (ethylene-co-vinyl acetate)-EVA. Characterization of microstructure, thermal stability and mechanical properties of the composite coatings with different Nd-Fe-B powder content were performed using Scanning Electron Microscope (SEM), Differential Scanning Calorimetry (DSC), and standard tensile tester, respectively. Experimental results show that composites with higher content of Nd-Fe-B powder have improved thermal and mechanical properties. Propagation characteristics of the constructed optical fiber magnetic sensing element (OFMSE) in the external magnetic field were investigated in relation to quality and composition of the applied composite coatings. The attenuation of optical signal with applied external magnetic field intensity was monitored and the results suggest that the sample with 50 wt-% of Nd-Fe-B provides the greatest sensitivity of the sensor element.
PB  - Inst Materials Physics, Bucharest
T2  - Digest Journal of Nanomaterials and Biostructures
T1  - Synthesis and performance of polymer based magnetic composite sensing element
EP  - 1483
IS  - 4
SP  - 1475
VL  - 10
UR  - https://hdl.handle.net/21.15107/rcub_technorep_3084
ER  - 

@article{
author = "El Swie, H. and Radojević, Vesna and Brajović, Ljiljana and Stajić-Trošić, Jasna and Ćosović, Vladan and Grujić, Aleksandar and Aleksić, Radoslav",
year = "2015",
abstract = "The commercial multi-mode optical fiber was coated with magnetic composite material prepared using Nd-Fe-B permanent magnet powder dispersed in poly (ethylene-co-vinyl acetate)-EVA. Characterization of microstructure, thermal stability and mechanical properties of the composite coatings with different Nd-Fe-B powder content were performed using Scanning Electron Microscope (SEM), Differential Scanning Calorimetry (DSC), and standard tensile tester, respectively. Experimental results show that composites with higher content of Nd-Fe-B powder have improved thermal and mechanical properties. Propagation characteristics of the constructed optical fiber magnetic sensing element (OFMSE) in the external magnetic field were investigated in relation to quality and composition of the applied composite coatings. The attenuation of optical signal with applied external magnetic field intensity was monitored and the results suggest that the sample with 50 wt-% of Nd-Fe-B provides the greatest sensitivity of the sensor element.",
publisher = "Inst Materials Physics, Bucharest",
journal = "Digest Journal of Nanomaterials and Biostructures",
title = "Synthesis and performance of polymer based magnetic composite sensing element",
pages = "1483-1475",
number = "4",
volume = "10",
url = "https://hdl.handle.net/21.15107/rcub_technorep_3084"
}

El Swie, H., Radojević, V., Brajović, L., Stajić-Trošić, J., Ćosović, V., Grujić, A.,& Aleksić, R.. (2015). Synthesis and performance of polymer based magnetic composite sensing element. in Digest Journal of Nanomaterials and Biostructures
Inst Materials Physics, Bucharest., 10(4), 1475-1483.
https://hdl.handle.net/21.15107/rcub_technorep_3084

El Swie H, Radojević V, Brajović L, Stajić-Trošić J, Ćosović V, Grujić A, Aleksić R. Synthesis and performance of polymer based magnetic composite sensing element. in Digest Journal of Nanomaterials and Biostructures. 2015;10(4):1475-1483.
https://hdl.handle.net/21.15107/rcub_technorep_3084 .

El Swie, H., Radojević, Vesna, Brajović, Ljiljana, Stajić-Trošić, Jasna, Ćosović, Vladan, Grujić, Aleksandar, Aleksić, Radoslav, "Synthesis and performance of polymer based magnetic composite sensing element" in Digest Journal of Nanomaterials and Biostructures, 10, no. 4 (2015):1475-1483,
https://hdl.handle.net/21.15107/rcub_technorep_3084 .

TY  - JOUR
AU  - Nedeljković, Dragutin
AU  - Stajčić, Aleksandar
AU  - Grujić, Aleksandar
AU  - Stijepović, Mirko
AU  - Stajić-Trošić, Jasna
PY  - 2015
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2865
AB  - The main task of the work is to construct the polymeric membrane that could be used for the waste gases treatment. For this purpose, membrane must have high permeability for the carbon dioxide and low permeability of the other gases commonly present in waste gases (hydrogen, oxygen, nitrogen and methane). The constructed membranes were of a dense type, based on a solubility/diffusivity mechanism. In order to enchase the permeability of carbon dioxide, four different zeolytes were added, and in order to improve mechanical stability two different additives were tested. Three zeolytes were with the 3-dimensional pores (ZSM5; Faujasite Linde type A) and one was with the 1-dimensional pores (Linde type L). As an additive, n-tetradecyldimethylamonium bromide - n-C14TMABr was tested. The aim of an additive was to provide good wetting of a highly electrically charged zeolyte particle by the hydrophobic polymer chains. The other examined additive was dimethylaminopyridine (DMAP) which should improve the solubility of carbon dioxide due to its alkali properties. The best results in carbon dioxide/hydrogen selectivity and permeability were obtained with the membrane constructed with PEBAX 1657 and surface treated zeolyte. The obtained permeability of carbon dioxide was 128 Barrer, and the carbon dioxide/hydrogen selectivity was 9.7.
AB  - Cilj istraživanja prikazanih u ovom radu je izrada polimerne membrane koja bi imala primenu u prečišćavanju otpadnih gasova. Membrana konstruisana za ovu primenu bi morala da ima visoku permeabilnost za ugljen-dioksid i nisku permeabilnost za druge gasove koji su standardno prisutni u otpadnim gasovima (vodonik, kiseonik, azot i metan). Dobijene membrane pripadaju tipu neporoznih membrana čija se permeabilnost bazira na mehanizmu rastvaranja i difuzije. U ovom radu, ispitivana je mogućnost primene poli(etilenoksida) - kopoli(ftalamida) za ovu svrhu. Da bi se povećala permeabilnost ugljen-dioksida, dodate su četiri različite vrste zeolitnih prahova, a u cilju poboljšanja mehaničkih svojstava, ispitivana su dva aditiva. Tri zeolitna praha korišćena u eksperimentu imaju trodimenzionalne pore (ZSM5, Faujasit i Linde zeolit tip A), a jedan prah je sa jednodimenzionalnim porama (Linde zeolit tip L). Kao aditiv je testiran n-tetradeciltrimetilamonijum bromid. Cilj dodavanja ovog aditiva je da omogući dobar kontakt između dugih, hidrofobnih polimernih lanaca i naelektrisanih čestica zeolita. Drugi ispitivani aditiv je dimetilaminopiridin, čija bi bazna svojstva trebalo da poboljšaju rastvorljovost ugljen dioksida. Najbolji rezultati su postignuti korišćenjem membrane konstruisane sa PEBAX 1657 polimerom i zeolitom u prisustvu aditiva.
PB  - Savez inženjera i tehničara Srbije, Beograd
T2  - Tehnika
T1  - The application of the zeolyte powder for the construction of the dense composite membranes for the carbon-dioxide separation
T1  - Primena zeolitnih prahova za izradu kompozitnih polimernih membrana za separaciju ugljen-dioksida
EP  - 222
IS  - 2
SP  - 216
VL  - 70
DO  - 10.5937/tehnika1502216N
ER  - 

@article{
author = "Nedeljković, Dragutin and Stajčić, Aleksandar and Grujić, Aleksandar and Stijepović, Mirko and Stajić-Trošić, Jasna",
year = "2015",
abstract = "The main task of the work is to construct the polymeric membrane that could be used for the waste gases treatment. For this purpose, membrane must have high permeability for the carbon dioxide and low permeability of the other gases commonly present in waste gases (hydrogen, oxygen, nitrogen and methane). The constructed membranes were of a dense type, based on a solubility/diffusivity mechanism. In order to enchase the permeability of carbon dioxide, four different zeolytes were added, and in order to improve mechanical stability two different additives were tested. Three zeolytes were with the 3-dimensional pores (ZSM5; Faujasite Linde type A) and one was with the 1-dimensional pores (Linde type L). As an additive, n-tetradecyldimethylamonium bromide - n-C14TMABr was tested. The aim of an additive was to provide good wetting of a highly electrically charged zeolyte particle by the hydrophobic polymer chains. The other examined additive was dimethylaminopyridine (DMAP) which should improve the solubility of carbon dioxide due to its alkali properties. The best results in carbon dioxide/hydrogen selectivity and permeability were obtained with the membrane constructed with PEBAX 1657 and surface treated zeolyte. The obtained permeability of carbon dioxide was 128 Barrer, and the carbon dioxide/hydrogen selectivity was 9.7., Cilj istraživanja prikazanih u ovom radu je izrada polimerne membrane koja bi imala primenu u prečišćavanju otpadnih gasova. Membrana konstruisana za ovu primenu bi morala da ima visoku permeabilnost za ugljen-dioksid i nisku permeabilnost za druge gasove koji su standardno prisutni u otpadnim gasovima (vodonik, kiseonik, azot i metan). Dobijene membrane pripadaju tipu neporoznih membrana čija se permeabilnost bazira na mehanizmu rastvaranja i difuzije. U ovom radu, ispitivana je mogućnost primene poli(etilenoksida) - kopoli(ftalamida) za ovu svrhu. Da bi se povećala permeabilnost ugljen-dioksida, dodate su četiri različite vrste zeolitnih prahova, a u cilju poboljšanja mehaničkih svojstava, ispitivana su dva aditiva. Tri zeolitna praha korišćena u eksperimentu imaju trodimenzionalne pore (ZSM5, Faujasit i Linde zeolit tip A), a jedan prah je sa jednodimenzionalnim porama (Linde zeolit tip L). Kao aditiv je testiran n-tetradeciltrimetilamonijum bromid. Cilj dodavanja ovog aditiva je da omogući dobar kontakt između dugih, hidrofobnih polimernih lanaca i naelektrisanih čestica zeolita. Drugi ispitivani aditiv je dimetilaminopiridin, čija bi bazna svojstva trebalo da poboljšaju rastvorljovost ugljen dioksida. Najbolji rezultati su postignuti korišćenjem membrane konstruisane sa PEBAX 1657 polimerom i zeolitom u prisustvu aditiva.",
publisher = "Savez inženjera i tehničara Srbije, Beograd",
journal = "Tehnika",
title = "The application of the zeolyte powder for the construction of the dense composite membranes for the carbon-dioxide separation, Primena zeolitnih prahova za izradu kompozitnih polimernih membrana za separaciju ugljen-dioksida",
pages = "222-216",
number = "2",
volume = "70",
doi = "10.5937/tehnika1502216N"
}

Nedeljković, D., Stajčić, A., Grujić, A., Stijepović, M.,& Stajić-Trošić, J.. (2015). The application of the zeolyte powder for the construction of the dense composite membranes for the carbon-dioxide separation. in Tehnika
Savez inženjera i tehničara Srbije, Beograd., 70(2), 216-222.
https://doi.org/10.5937/tehnika1502216N

Nedeljković D, Stajčić A, Grujić A, Stijepović M, Stajić-Trošić J. The application of the zeolyte powder for the construction of the dense composite membranes for the carbon-dioxide separation. in Tehnika. 2015;70(2):216-222.
doi:10.5937/tehnika1502216N .

Nedeljković, Dragutin, Stajčić, Aleksandar, Grujić, Aleksandar, Stijepović, Mirko, Stajić-Trošić, Jasna, "The application of the zeolyte powder for the construction of the dense composite membranes for the carbon-dioxide separation" in Tehnika, 70, no. 2 (2015):216-222,
https://doi.org/10.5937/tehnika1502216N . .

TY  - JOUR
AU  - Grujić, Aleksandar
AU  - Stijepović, Mirko
AU  - Stajić-Trošić, Jasna
AU  - Ilić, J.
AU  - Nedeljković, Dragutin
PY  - 2015
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2868
AB  - In this study, design of lab scale device for determination of separation properties of membranes is presented and analyzed. Device operates with different gas pressure between chambers, whereby gas streams perpendicular to the membrane. Using appropriate acquisition system and applying mathematical formulas, mechanism for gas transfer through the membrane is determinate. Polymer membranes based on zeolite are synthesized and tested by lab scale device. The membranes with various content of zeolite are tested with CO2 gas until optimal composition of membrane components is established. Beside good mechanical and structural properties of applied membrane, suitable values of permeability with good agreement with the literature data are obtained.
AB  - U ovom radu je prikazano i analizirano konstrukcijsko rešenje laboratorijskog uređaja za određivanje separacionih svojstava membrana. Rad uređaja je baziran na razlici pritisaka između komora, pri čemu gas struji normalno na poprečni presek membrana. Odgovarajućim sistemom za akviziciju podataka i primenom odgovarajućih matematičkih formula određen je mehanizam prenosa kroz membranu. Polimerne membrane na bazi zeolita su sintetizovane i testirane na uređaju. Membrane sa različitim udelim zeolita su testirane na CO2 gas, dok nije ustanovljen optimalan sastav komponenti za sintezu membrana.Pored dobrih mehaničkih i strukturnih svojstava testirane membrane, dobijene su zadovoljavajuće vrednosti permeabilnosti koje su u saglasnosti sa drugim autorima.
PB  - Bosnia and Herzegovina : University of East Sarajevo, Faculty of Technology
T2  - Journal of Engineering & Processing Management
T1  - A method for determination of separation properties of membranes
T1  - Metod za određivanje separacionih svojstava membrana
EP  - 54
IS  - 1
SP  - 45
VL  - 7
DO  - 10.7251/JEPMEN1507045G
ER  - 

@article{
author = "Grujić, Aleksandar and Stijepović, Mirko and Stajić-Trošić, Jasna and Ilić, J. and Nedeljković, Dragutin",
year = "2015",
abstract = "In this study, design of lab scale device for determination of separation properties of membranes is presented and analyzed. Device operates with different gas pressure between chambers, whereby gas streams perpendicular to the membrane. Using appropriate acquisition system and applying mathematical formulas, mechanism for gas transfer through the membrane is determinate. Polymer membranes based on zeolite are synthesized and tested by lab scale device. The membranes with various content of zeolite are tested with CO2 gas until optimal composition of membrane components is established. Beside good mechanical and structural properties of applied membrane, suitable values of permeability with good agreement with the literature data are obtained., U ovom radu je prikazano i analizirano konstrukcijsko rešenje laboratorijskog uređaja za određivanje separacionih svojstava membrana. Rad uređaja je baziran na razlici pritisaka između komora, pri čemu gas struji normalno na poprečni presek membrana. Odgovarajućim sistemom za akviziciju podataka i primenom odgovarajućih matematičkih formula određen je mehanizam prenosa kroz membranu. Polimerne membrane na bazi zeolita su sintetizovane i testirane na uređaju. Membrane sa različitim udelim zeolita su testirane na CO2 gas, dok nije ustanovljen optimalan sastav komponenti za sintezu membrana.Pored dobrih mehaničkih i strukturnih svojstava testirane membrane, dobijene su zadovoljavajuće vrednosti permeabilnosti koje su u saglasnosti sa drugim autorima.",
publisher = "Bosnia and Herzegovina : University of East Sarajevo, Faculty of Technology",
journal = "Journal of Engineering & Processing Management",
title = "A method for determination of separation properties of membranes, Metod za određivanje separacionih svojstava membrana",
pages = "54-45",
number = "1",
volume = "7",
doi = "10.7251/JEPMEN1507045G"
}

Grujić, A., Stijepović, M., Stajić-Trošić, J., Ilić, J.,& Nedeljković, D.. (2015). A method for determination of separation properties of membranes. in Journal of Engineering & Processing Management
Bosnia and Herzegovina : University of East Sarajevo, Faculty of Technology., 7(1), 45-54.
https://doi.org/10.7251/JEPMEN1507045G

Grujić A, Stijepović M, Stajić-Trošić J, Ilić J, Nedeljković D. A method for determination of separation properties of membranes. in Journal of Engineering & Processing Management. 2015;7(1):45-54.
doi:10.7251/JEPMEN1507045G .

Grujić, Aleksandar, Stijepović, Mirko, Stajić-Trošić, Jasna, Ilić, J., Nedeljković, Dragutin, "A method for determination of separation properties of membranes" in Journal of Engineering & Processing Management, 7, no. 1 (2015):45-54,
https://doi.org/10.7251/JEPMEN1507045G . .

TY  - CONF
AU  - Stijepović, Mirko
AU  - Papadopoulos, Athanasios I.
AU  - Linke, Patrick
AU  - Grujić, Aleksandar
AU  - Seferlis, Panos
PY  - 2014
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2718
AB  - This work addresses the design of Organic Rankine Cycle (ORC) processes used for power generation from low-grade heat available in site utility systems. The Exergy Composite Curves approach is used within a systemic optimization framework to explore various complex ORC configurations. The method facilitates interconnectivity at several temperature and pressure levels, considering different types and numbers of turbines as design decision parameters simultaneously with other operating ORC features. It is employed to investigate the performance of two generic ORC configurations, namely one considering independent pressure loops with expansion turbines and the other considering pressure loops contacted through induction turbines. To optimize the number of pressure levels, ORC structural configuration, and operating parameters an inclusive objective function is used considering thermodynamic criteria. The application of the method is demonstrated by a case study on waste heat recovery and reuse in a utility plant.
PB  - Elsevier Science Bv, Amsterdam
C3  - 24th European Symposium on Computer Aided Process Engineering, Pts A and B
T1  - Design of Multi-pressure Organic Rankine Cycles for Waste Heat Recovery in Site Utility Systems
EP  - 114
SP  - 109
VL  - 33
UR  - https://hdl.handle.net/21.15107/rcub_technorep_2718
ER  - 

@conference{
author = "Stijepović, Mirko and Papadopoulos, Athanasios I. and Linke, Patrick and Grujić, Aleksandar and Seferlis, Panos",
year = "2014",
abstract = "This work addresses the design of Organic Rankine Cycle (ORC) processes used for power generation from low-grade heat available in site utility systems. The Exergy Composite Curves approach is used within a systemic optimization framework to explore various complex ORC configurations. The method facilitates interconnectivity at several temperature and pressure levels, considering different types and numbers of turbines as design decision parameters simultaneously with other operating ORC features. It is employed to investigate the performance of two generic ORC configurations, namely one considering independent pressure loops with expansion turbines and the other considering pressure loops contacted through induction turbines. To optimize the number of pressure levels, ORC structural configuration, and operating parameters an inclusive objective function is used considering thermodynamic criteria. The application of the method is demonstrated by a case study on waste heat recovery and reuse in a utility plant.",
publisher = "Elsevier Science Bv, Amsterdam",
journal = "24th European Symposium on Computer Aided Process Engineering, Pts A and B",
title = "Design of Multi-pressure Organic Rankine Cycles for Waste Heat Recovery in Site Utility Systems",
pages = "114-109",
volume = "33",
url = "https://hdl.handle.net/21.15107/rcub_technorep_2718"
}

Stijepović, M., Papadopoulos, A. I., Linke, P., Grujić, A.,& Seferlis, P.. (2014). Design of Multi-pressure Organic Rankine Cycles for Waste Heat Recovery in Site Utility Systems. in 24th European Symposium on Computer Aided Process Engineering, Pts A and B
Elsevier Science Bv, Amsterdam., 33, 109-114.
https://hdl.handle.net/21.15107/rcub_technorep_2718

Stijepović M, Papadopoulos AI, Linke P, Grujić A, Seferlis P. Design of Multi-pressure Organic Rankine Cycles for Waste Heat Recovery in Site Utility Systems. in 24th European Symposium on Computer Aided Process Engineering, Pts A and B. 2014;33:109-114.
https://hdl.handle.net/21.15107/rcub_technorep_2718 .

Stijepović, Mirko, Papadopoulos, Athanasios I., Linke, Patrick, Grujić, Aleksandar, Seferlis, Panos, "Design of Multi-pressure Organic Rankine Cycles for Waste Heat Recovery in Site Utility Systems" in 24th European Symposium on Computer Aided Process Engineering, Pts A and B, 33 (2014):109-114,
https://hdl.handle.net/21.15107/rcub_technorep_2718 .

TY  - JOUR
AU  - Stijepović, Mirko
AU  - Papadopoulos, Athanasios I.
AU  - Linke, Patrick
AU  - Grujić, Aleksandar
AU  - Seferlis, Panos
PY  - 2014
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2580
AB  - This work addresses the design of Organic Rankine Cycle (ORC) processes used for power generation from low-grade heat available in site utility systems. The Exergy Composite Curves approach is used within a systemic optimization framework to explore various complex ORC configurations. The method facilitates interconnectivity at several temperature and pressure levels, considering different types and numbers of turbines as design decision parameters simultaneously with other operating ORC features. It is employed to investigate the performance of two generic ORC configurations, namely one considering independent pressure loops with expansion turbines and the other considering pressure loops contacted through induction turbines. To optimize the number of pressure levels, ORC structural configuration, and operating parameters an inclusive objective function is used considering thermodynamic criteria. The application of the method is demonstrated by a case study on waste heat recovery and reuse in a utility plant.
PB  - Elsevier B.V.
T2  - Computer Aided Chemical Engineering
T1  - Design of multi-pressure organic rankine cycles for waste heat recovery in site utility systems
EP  - 114
SP  - 109
VL  - 33
DO  - 10.1016/B978-0-444-63456-6.50019-3
ER  - 

@article{
author = "Stijepović, Mirko and Papadopoulos, Athanasios I. and Linke, Patrick and Grujić, Aleksandar and Seferlis, Panos",
year = "2014",
abstract = "This work addresses the design of Organic Rankine Cycle (ORC) processes used for power generation from low-grade heat available in site utility systems. The Exergy Composite Curves approach is used within a systemic optimization framework to explore various complex ORC configurations. The method facilitates interconnectivity at several temperature and pressure levels, considering different types and numbers of turbines as design decision parameters simultaneously with other operating ORC features. It is employed to investigate the performance of two generic ORC configurations, namely one considering independent pressure loops with expansion turbines and the other considering pressure loops contacted through induction turbines. To optimize the number of pressure levels, ORC structural configuration, and operating parameters an inclusive objective function is used considering thermodynamic criteria. The application of the method is demonstrated by a case study on waste heat recovery and reuse in a utility plant.",
publisher = "Elsevier B.V.",
journal = "Computer Aided Chemical Engineering",
title = "Design of multi-pressure organic rankine cycles for waste heat recovery in site utility systems",
pages = "114-109",
volume = "33",
doi = "10.1016/B978-0-444-63456-6.50019-3"
}

Stijepović, M., Papadopoulos, A. I., Linke, P., Grujić, A.,& Seferlis, P.. (2014). Design of multi-pressure organic rankine cycles for waste heat recovery in site utility systems. in Computer Aided Chemical Engineering
Elsevier B.V.., 33, 109-114.
https://doi.org/10.1016/B978-0-444-63456-6.50019-3

Stijepović M, Papadopoulos AI, Linke P, Grujić A, Seferlis P. Design of multi-pressure organic rankine cycles for waste heat recovery in site utility systems. in Computer Aided Chemical Engineering. 2014;33:109-114.
doi:10.1016/B978-0-444-63456-6.50019-3 .

Stijepović, Mirko, Papadopoulos, Athanasios I., Linke, Patrick, Grujić, Aleksandar, Seferlis, Panos, "Design of multi-pressure organic rankine cycles for waste heat recovery in site utility systems" in Computer Aided Chemical Engineering, 33 (2014):109-114,
https://doi.org/10.1016/B978-0-444-63456-6.50019-3 . .

TY  - JOUR
AU  - Stijepović, Mirko
AU  - Papadopoulos, Athanasios I.
AU  - Linke, Patrick
AU  - Grujić, Aleksandar
AU  - Seferlis, Panos
PY  - 2014
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2833
AB  - This work adopts the (ECCs) under bar (exergy composite curves) approach to explore the potential for ORC (organic Rankine cycle) process improvements. The method is used to explore different ORC configurations supported by a mathematical model representing a generic multi-pressure ORC cascade and developed based on the principles of the ECCs method. The model facilitates interconnectivity at different temperature and pressure levels, also considering two types of turbines, namely an expansion and an induction turbine. It is employed to investigate the performance of two major ORC configurations, namely one considering independent pressure loops with an expansion turbine and the other considering pressure loops contacted through induction turbines. These configurations are updated with new features within an iterative procedure supporting the systematic identification of the optimum number of pressure loops together with several operating optimization parameters. The optimization is performed using an inclusive objective function, while the obtained results indicate ORC systems of high performance.
PB  - Pergamon-Elsevier Science Ltd, Oxford
T2  - Energy
T1  - An exergy composite curves approach for the design of optimum multi-pressure organic Rankine cycle processes
EP  - 298
SP  - 285
VL  - 69
DO  - 10.1016/j.energy.2014.03.006
ER  - 

@article{
author = "Stijepović, Mirko and Papadopoulos, Athanasios I. and Linke, Patrick and Grujić, Aleksandar and Seferlis, Panos",
year = "2014",
abstract = "This work adopts the (ECCs) under bar (exergy composite curves) approach to explore the potential for ORC (organic Rankine cycle) process improvements. The method is used to explore different ORC configurations supported by a mathematical model representing a generic multi-pressure ORC cascade and developed based on the principles of the ECCs method. The model facilitates interconnectivity at different temperature and pressure levels, also considering two types of turbines, namely an expansion and an induction turbine. It is employed to investigate the performance of two major ORC configurations, namely one considering independent pressure loops with an expansion turbine and the other considering pressure loops contacted through induction turbines. These configurations are updated with new features within an iterative procedure supporting the systematic identification of the optimum number of pressure loops together with several operating optimization parameters. The optimization is performed using an inclusive objective function, while the obtained results indicate ORC systems of high performance.",
publisher = "Pergamon-Elsevier Science Ltd, Oxford",
journal = "Energy",
title = "An exergy composite curves approach for the design of optimum multi-pressure organic Rankine cycle processes",
pages = "298-285",
volume = "69",
doi = "10.1016/j.energy.2014.03.006"
}

Stijepović, M., Papadopoulos, A. I., Linke, P., Grujić, A.,& Seferlis, P.. (2014). An exergy composite curves approach for the design of optimum multi-pressure organic Rankine cycle processes. in Energy
Pergamon-Elsevier Science Ltd, Oxford., 69, 285-298.
https://doi.org/10.1016/j.energy.2014.03.006

Stijepović M, Papadopoulos AI, Linke P, Grujić A, Seferlis P. An exergy composite curves approach for the design of optimum multi-pressure organic Rankine cycle processes. in Energy. 2014;69:285-298.
doi:10.1016/j.energy.2014.03.006 .

Stijepović, Mirko, Papadopoulos, Athanasios I., Linke, Patrick, Grujić, Aleksandar, Seferlis, Panos, "An exergy composite curves approach for the design of optimum multi-pressure organic Rankine cycle processes" in Energy, 69 (2014):285-298,
https://doi.org/10.1016/j.energy.2014.03.006 . .

TY  - JOUR
AU  - Stajić-Trošić, Jasna
AU  - Grujić, Aleksandar
AU  - Stijepović, Mirko
AU  - Nedeljković, Dragutin
AU  - Stajčić, Aleksandar
AU  - Žák, Tomáš
PY  - 2014
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2585
AB  - Polymer bonded magnets are contemporary materials with a very large range of applications. The objective of this study is to assess how different content of Nd-Fe-B and/or barium ferrite particles affect on magnetic and morphological properties of bonded composite materials. Interactions between employed magnetic powders and interactions between magnetic powders and polymer binder are considered. For examination of the magnetic behavior Vibrating Sample Magnetometer (VSM) is used. Different shape and size of obtained hysteresis loops are used for comparison and prediction of polymer bonded materials properties.
AB  - Polimerom vezani magneti predstavljaju savremene materijale sa veoma širokim spektrom primene. Cilj ovog rada je da se analizira i prikaže kako različiti udeli čestica Nd-Fe-B i/ili barijum ferita utiču na magnetna i morfološka svojstva bonded kompozitnih materijala. Razmatrane su interakcije između primenjenih magnetnih prahova različitog tipa i interakcije između magnetnih prahova i polimerne matrice. Za merenje magnetnih svojstava kompozita korišćen je vibracioni magnetometar (VSM). Različiti oblici i veličine dobijenih histerezisnih petlji su poređeni i analizirani u cilju predviđanja magnetnog ponašanja kompozita.
PB  - Inženjersko društvo za koroziju, Beograd
T2  - Zaštita materijala
T1  - Magnetic behaviour of hybrid magnetic composite materials
T1  - Magnetno ponašanje hibridnih magnetnih kompozitnih materijala
EP  - 172
IS  - 2
SP  - 170
VL  - 55
DO  - 10.5937/ZasMat1402170S
ER  - 

@article{
author = "Stajić-Trošić, Jasna and Grujić, Aleksandar and Stijepović, Mirko and Nedeljković, Dragutin and Stajčić, Aleksandar and Žák, Tomáš",
year = "2014",
abstract = "Polymer bonded magnets are contemporary materials with a very large range of applications. The objective of this study is to assess how different content of Nd-Fe-B and/or barium ferrite particles affect on magnetic and morphological properties of bonded composite materials. Interactions between employed magnetic powders and interactions between magnetic powders and polymer binder are considered. For examination of the magnetic behavior Vibrating Sample Magnetometer (VSM) is used. Different shape and size of obtained hysteresis loops are used for comparison and prediction of polymer bonded materials properties., Polimerom vezani magneti predstavljaju savremene materijale sa veoma širokim spektrom primene. Cilj ovog rada je da se analizira i prikaže kako različiti udeli čestica Nd-Fe-B i/ili barijum ferita utiču na magnetna i morfološka svojstva bonded kompozitnih materijala. Razmatrane su interakcije između primenjenih magnetnih prahova različitog tipa i interakcije između magnetnih prahova i polimerne matrice. Za merenje magnetnih svojstava kompozita korišćen je vibracioni magnetometar (VSM). Različiti oblici i veličine dobijenih histerezisnih petlji su poređeni i analizirani u cilju predviđanja magnetnog ponašanja kompozita.",
publisher = "Inženjersko društvo za koroziju, Beograd",
journal = "Zaštita materijala",
title = "Magnetic behaviour of hybrid magnetic composite materials, Magnetno ponašanje hibridnih magnetnih kompozitnih materijala",
pages = "172-170",
number = "2",
volume = "55",
doi = "10.5937/ZasMat1402170S"
}

Stajić-Trošić, J., Grujić, A., Stijepović, M., Nedeljković, D., Stajčić, A.,& Žák, T.. (2014). Magnetic behaviour of hybrid magnetic composite materials. in Zaštita materijala
Inženjersko društvo za koroziju, Beograd., 55(2), 170-172.
https://doi.org/10.5937/ZasMat1402170S

Stajić-Trošić J, Grujić A, Stijepović M, Nedeljković D, Stajčić A, Žák T. Magnetic behaviour of hybrid magnetic composite materials. in Zaštita materijala. 2014;55(2):170-172.
doi:10.5937/ZasMat1402170S .

Stajić-Trošić, Jasna, Grujić, Aleksandar, Stijepović, Mirko, Nedeljković, Dragutin, Stajčić, Aleksandar, Žák, Tomáš, "Magnetic behaviour of hybrid magnetic composite materials" in Zaštita materijala, 55, no. 2 (2014):170-172,
https://doi.org/10.5937/ZasMat1402170S . .

TY  - JOUR
AU  - Marković, Radmila
AU  - Stevanović, Jasmina
AU  - Gvozdenović, Milica
AU  - Jugović, Branimir
AU  - Grujić, Aleksandar
AU  - Nedeljković, Dragutin
AU  - Stajić-Trošić, Jasna
PY  - 2013
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2281
AB  - The use of copper anodes with non standard content of impurities for the treatment of waste, sulphur acid solutions that came as a result of the industrial process of electrolytic copper refining was investigated. Those solutions contain the high content of copper, nickel and arsine, and because of that, the copper anodes with high content of Ni, Pb, Sn and Sb were prepared. Examination the effect of high impurities content as well as the influence of the solution temperature on the anodes behaviour during the electrolytic process under the conditions that are the same as the industrial was the aim of this work. Obtained results clearly indicate that tested anodes could be used for the refined during the electrorefining process. Dissolution of copper anodes was not stoppage after the first appearance of the passivation region for A1 and A2 anodes while appearance of passivation for A3 anode, for test duration of 72 h, was not registered. The start time of the first passivation appearance is shorter in the case of the anode with high content of all impurities, anode A1. The first passivation occurrence was detected on higher temperature after about 29 h from the test starts. The change of chemical composition of electrolyte was monitored during electrolysis. Concentration of nickel in the working electrolyte at the end of process is increased and it corresponds to the Ni content in anodes. The copper and arsenic concentrations are decreased during the process. Arsenic passes into the anode slime, while the copper is deposited on the cathode and also passed in the slime. After the process is finished, obtained solution could be used for the nickel recover using the electrochemically or chemically methods.
PB  - Electrochemical Science Group, Beograd
T2  - International Journal of Electrochemical Science
T1  - Treatment of Waste Copper Electrolytes Using Insoluble and Soluble Anodes
EP  - 7370
IS  - 5
SP  - 7357
VL  - 8
UR  - https://hdl.handle.net/21.15107/rcub_technorep_2281
ER  - 

@article{
author = "Marković, Radmila and Stevanović, Jasmina and Gvozdenović, Milica and Jugović, Branimir and Grujić, Aleksandar and Nedeljković, Dragutin and Stajić-Trošić, Jasna",
year = "2013",
abstract = "The use of copper anodes with non standard content of impurities for the treatment of waste, sulphur acid solutions that came as a result of the industrial process of electrolytic copper refining was investigated. Those solutions contain the high content of copper, nickel and arsine, and because of that, the copper anodes with high content of Ni, Pb, Sn and Sb were prepared. Examination the effect of high impurities content as well as the influence of the solution temperature on the anodes behaviour during the electrolytic process under the conditions that are the same as the industrial was the aim of this work. Obtained results clearly indicate that tested anodes could be used for the refined during the electrorefining process. Dissolution of copper anodes was not stoppage after the first appearance of the passivation region for A1 and A2 anodes while appearance of passivation for A3 anode, for test duration of 72 h, was not registered. The start time of the first passivation appearance is shorter in the case of the anode with high content of all impurities, anode A1. The first passivation occurrence was detected on higher temperature after about 29 h from the test starts. The change of chemical composition of electrolyte was monitored during electrolysis. Concentration of nickel in the working electrolyte at the end of process is increased and it corresponds to the Ni content in anodes. The copper and arsenic concentrations are decreased during the process. Arsenic passes into the anode slime, while the copper is deposited on the cathode and also passed in the slime. After the process is finished, obtained solution could be used for the nickel recover using the electrochemically or chemically methods.",
publisher = "Electrochemical Science Group, Beograd",
journal = "International Journal of Electrochemical Science",
title = "Treatment of Waste Copper Electrolytes Using Insoluble and Soluble Anodes",
pages = "7370-7357",
number = "5",
volume = "8",
url = "https://hdl.handle.net/21.15107/rcub_technorep_2281"
}

Marković, R., Stevanović, J., Gvozdenović, M., Jugović, B., Grujić, A., Nedeljković, D.,& Stajić-Trošić, J.. (2013). Treatment of Waste Copper Electrolytes Using Insoluble and Soluble Anodes. in International Journal of Electrochemical Science
Electrochemical Science Group, Beograd., 8(5), 7357-7370.
https://hdl.handle.net/21.15107/rcub_technorep_2281

Marković R, Stevanović J, Gvozdenović M, Jugović B, Grujić A, Nedeljković D, Stajić-Trošić J. Treatment of Waste Copper Electrolytes Using Insoluble and Soluble Anodes. in International Journal of Electrochemical Science. 2013;8(5):7357-7370.
https://hdl.handle.net/21.15107/rcub_technorep_2281 .

Marković, Radmila, Stevanović, Jasmina, Gvozdenović, Milica, Jugović, Branimir, Grujić, Aleksandar, Nedeljković, Dragutin, Stajić-Trošić, Jasna, "Treatment of Waste Copper Electrolytes Using Insoluble and Soluble Anodes" in International Journal of Electrochemical Science, 8, no. 5 (2013):7357-7370,
https://hdl.handle.net/21.15107/rcub_technorep_2281 .

TY  - JOUR
AU  - Grujić, Aleksandar
AU  - Stajić-Trošić, Jasna
AU  - Stijepović, Mirko
AU  - Nedeljković, Dragutin
AU  - Stajčić, Aleksandar
AU  - Stevanović, Jasmina
PY  - 2013
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2278
AB  - Various types and contents of magnetic powder and polymer matrix induce different mechanical, magnetic, electrical and optical properties of final composite material. The strong influence of relatively small amounts of filler particles on the dynamic mechanical properties of polymers has significantly contributed to increased use of polymer materials in many commercial applications. The higher content of magnetic filler has direct influence on magnetic properties of composites, but also may change the rheology of polymer melt during process and, subsequently, impact the mechanical strength of bonded magnets. For better insight into viscoelastic behaviour of composites, beside experiments, a theory that explicitly takes the shape factor, particle distribution, particle-particle interactions as well as particle-polymer matrix interactions into account is required. The mathematical prediction of storage modulus behaviour is examined. The several proposed analytical models are tested versus experimental results. Some of applied models agree very well with experimental data, whilst others deviate significantly.
AB  - Različite vrste primenjenih magnetnih prahova i polimerne matrice, kao i njihovi udeli, utiču na mehanička, magnetna, električna i optička svojstva finalnog kompozitnog materijala. Veliki uticaj relativno malih udela čestica punioca na dinamičko mehanička svojstva polimera značajno doprinosi većoj komercijalnoj upotrebi kompozitnih materijala. Veliki udeli magnetnog praha u mnogome utiču na magnetna svojstva kompozita, ali takođe mogu dovesti do reoloških promena u polimeru tokom procesa topljenja, što ima direktan uticaj na mehanička svojstva polimerom vezanih (bonded) magneta. Radi boljeg uvida u visokoelastična svojstva kompozita, osim eksperimenata, neophodno je uzeti u obzir i teorijska razmatranja koja eksplicitno objašnjavaju uticaj faktora oblika, raspodelu čestica, interakcije između čestica, kao i interakcije između čestica i polimera. U tom smislu vršeno je i matematičko predviđanje ponašanja modula uskladištene energije (E') kompozita. Nekoliko predloženih analitičkih modela su testirani i upoređeni sa eksperimentalnim rezultatima. Neki od primenjenih modela se veoma dobro slažu sa dobijenim eksperimentalnim rezultatima, dok neki značajno odstupaju.
PB  - Inženjersko društvo za koroziju, Beograd
T2  - Zaštita materijala
T1  - Polymer bonded magnetic composites based on Nd-Fe-B
T1  - Polimerni magnetni kompoziti na bazi Nd-Fe-B
EP  - 365
IS  - 4
SP  - 361
VL  - 54
UR  - https://hdl.handle.net/21.15107/rcub_technorep_2278
ER  - 

@article{
author = "Grujić, Aleksandar and Stajić-Trošić, Jasna and Stijepović, Mirko and Nedeljković, Dragutin and Stajčić, Aleksandar and Stevanović, Jasmina",
year = "2013",
abstract = "Various types and contents of magnetic powder and polymer matrix induce different mechanical, magnetic, electrical and optical properties of final composite material. The strong influence of relatively small amounts of filler particles on the dynamic mechanical properties of polymers has significantly contributed to increased use of polymer materials in many commercial applications. The higher content of magnetic filler has direct influence on magnetic properties of composites, but also may change the rheology of polymer melt during process and, subsequently, impact the mechanical strength of bonded magnets. For better insight into viscoelastic behaviour of composites, beside experiments, a theory that explicitly takes the shape factor, particle distribution, particle-particle interactions as well as particle-polymer matrix interactions into account is required. The mathematical prediction of storage modulus behaviour is examined. The several proposed analytical models are tested versus experimental results. Some of applied models agree very well with experimental data, whilst others deviate significantly., Različite vrste primenjenih magnetnih prahova i polimerne matrice, kao i njihovi udeli, utiču na mehanička, magnetna, električna i optička svojstva finalnog kompozitnog materijala. Veliki uticaj relativno malih udela čestica punioca na dinamičko mehanička svojstva polimera značajno doprinosi većoj komercijalnoj upotrebi kompozitnih materijala. Veliki udeli magnetnog praha u mnogome utiču na magnetna svojstva kompozita, ali takođe mogu dovesti do reoloških promena u polimeru tokom procesa topljenja, što ima direktan uticaj na mehanička svojstva polimerom vezanih (bonded) magneta. Radi boljeg uvida u visokoelastična svojstva kompozita, osim eksperimenata, neophodno je uzeti u obzir i teorijska razmatranja koja eksplicitno objašnjavaju uticaj faktora oblika, raspodelu čestica, interakcije između čestica, kao i interakcije između čestica i polimera. U tom smislu vršeno je i matematičko predviđanje ponašanja modula uskladištene energije (E') kompozita. Nekoliko predloženih analitičkih modela su testirani i upoređeni sa eksperimentalnim rezultatima. Neki od primenjenih modela se veoma dobro slažu sa dobijenim eksperimentalnim rezultatima, dok neki značajno odstupaju.",
publisher = "Inženjersko društvo za koroziju, Beograd",
journal = "Zaštita materijala",
title = "Polymer bonded magnetic composites based on Nd-Fe-B, Polimerni magnetni kompoziti na bazi Nd-Fe-B",
pages = "365-361",
number = "4",
volume = "54",
url = "https://hdl.handle.net/21.15107/rcub_technorep_2278"
}

Grujić, A., Stajić-Trošić, J., Stijepović, M., Nedeljković, D., Stajčić, A.,& Stevanović, J.. (2013). Polymer bonded magnetic composites based on Nd-Fe-B. in Zaštita materijala
Inženjersko društvo za koroziju, Beograd., 54(4), 361-365.
https://hdl.handle.net/21.15107/rcub_technorep_2278

Grujić A, Stajić-Trošić J, Stijepović M, Nedeljković D, Stajčić A, Stevanović J. Polymer bonded magnetic composites based on Nd-Fe-B. in Zaštita materijala. 2013;54(4):361-365.
https://hdl.handle.net/21.15107/rcub_technorep_2278 .

Grujić, Aleksandar, Stajić-Trošić, Jasna, Stijepović, Mirko, Nedeljković, Dragutin, Stajčić, Aleksandar, Stevanović, Jasmina, "Polymer bonded magnetic composites based on Nd-Fe-B" in Zaštita materijala, 54, no. 4 (2013):361-365,
https://hdl.handle.net/21.15107/rcub_technorep_2278 .

TY  - JOUR
AU  - Grujić, Aleksandar
AU  - Stijepović, Mirko
AU  - Stajić-Trošić, Jasna
AU  - Putić, Slaviša
AU  - Nedeljković, Dragutin
AU  - Stajčić, Aleksandar
AU  - Aleksić, Radoslav
PY  - 2012
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2208
AB  - Magnetic composite materials with varied content of Nd-Fe-B particles in epoxy matrix are examined from a dynamic mechanical perspective. Structural, viscoelastic and magnetic properties of composites have been observed using Scanning Electron Microscope (SEM), Dynamic Mechanical Analysis (DMA) and Super Quantum Interference Device (SQUID) magnetometer, respectively. Experimental results show that magnetic properties and corresponding dynamic mechanical behaviour depend on packing density. Also, results observed by predictive mathematical models suggest that maximal packing factor has a direct impact on elastic behaviour of composites. [doi:10.2320/matertrans.M2011218]
PB  - Japan Inst Metals, Sendai
T2  - Materials Transactions
T1  - Dynamic Mechanical Behaviour of Polymer Bonded Nd-Fe-B Composite Materials
EP  - 400
IS  - 2
SP  - 395
VL  - 53
DO  - 10.2320/matertrans.M2011218
ER  - 

@article{
author = "Grujić, Aleksandar and Stijepović, Mirko and Stajić-Trošić, Jasna and Putić, Slaviša and Nedeljković, Dragutin and Stajčić, Aleksandar and Aleksić, Radoslav",
year = "2012",
abstract = "Magnetic composite materials with varied content of Nd-Fe-B particles in epoxy matrix are examined from a dynamic mechanical perspective. Structural, viscoelastic and magnetic properties of composites have been observed using Scanning Electron Microscope (SEM), Dynamic Mechanical Analysis (DMA) and Super Quantum Interference Device (SQUID) magnetometer, respectively. Experimental results show that magnetic properties and corresponding dynamic mechanical behaviour depend on packing density. Also, results observed by predictive mathematical models suggest that maximal packing factor has a direct impact on elastic behaviour of composites. [doi:10.2320/matertrans.M2011218]",
publisher = "Japan Inst Metals, Sendai",
journal = "Materials Transactions",
title = "Dynamic Mechanical Behaviour of Polymer Bonded Nd-Fe-B Composite Materials",
pages = "400-395",
number = "2",
volume = "53",
doi = "10.2320/matertrans.M2011218"
}

Grujić, A., Stijepović, M., Stajić-Trošić, J., Putić, S., Nedeljković, D., Stajčić, A.,& Aleksić, R.. (2012). Dynamic Mechanical Behaviour of Polymer Bonded Nd-Fe-B Composite Materials. in Materials Transactions
Japan Inst Metals, Sendai., 53(2), 395-400.
https://doi.org/10.2320/matertrans.M2011218

Grujić A, Stijepović M, Stajić-Trošić J, Putić S, Nedeljković D, Stajčić A, Aleksić R. Dynamic Mechanical Behaviour of Polymer Bonded Nd-Fe-B Composite Materials. in Materials Transactions. 2012;53(2):395-400.
doi:10.2320/matertrans.M2011218 .

Grujić, Aleksandar, Stijepović, Mirko, Stajić-Trošić, Jasna, Putić, Slaviša, Nedeljković, Dragutin, Stajčić, Aleksandar, Aleksić, Radoslav, "Dynamic Mechanical Behaviour of Polymer Bonded Nd-Fe-B Composite Materials" in Materials Transactions, 53, no. 2 (2012):395-400,
https://doi.org/10.2320/matertrans.M2011218 . .

TY  - JOUR
AU  - Stajčić, Aleksandar
AU  - Stajić-Trošić, Jasna
AU  - Grujić, Aleksandar
AU  - Stijepović, Mirko
AU  - Lazić, Nada L.
AU  - Žák, Tomáš
AU  - Aleksić, Radoslav
PY  - 2012
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2100
AB  - Lately, there has been great attention paid to the research of bonded hybrid composites with improved dynamic mechanical capacities capable of replacing bonded Nd-Fe-B magnetic materials, by using cheaper (ferrite) materials instead of the Nd-Fe-B powder while retaining the satisfying values of the maximum magnetic energy. The objective of this study is to assess how different contents of Nd-Fe-B and/or barium ferrite particles can affect morphological, dynamic mechanical and magnetic properties of bonded composite materials. The interactions between employed magnetic powders and the interactions between magnetic powders and polymer binder are considered. For the examination of the magnetic behaviour, a vibrating sample magnetometer (VSM) is used. Different shapes and sizes of the obtained hysteresis loops are used for comparison and prediction of the polymer bonded materials properties. The homogeneous distribution of the magnetic particles in the polymer matrix is validated using scanning electron microscopy (SEM). The elastic and damping behavior examined by dynamic mechanical analysis (DMA) show improved properties for hybrid composite materials.
AB  - Istraživački trend u oblasti polimerom vezanih (bonded) Nd-Fe-B magnetnih materijala se reflektuje kroz razvoj bonded hibridnih kompozita sa poboljšanim dinamičko-mehaničkim svojstvima i primetno nižoj ceni zbog zamene skupe Nd- Fe-B legure jeftinijim magnetnim materijalima (ferit) uz postizanje zadovoljavajućih vrednosti maksimalne magnetne energije. Cilj ovog rada je da ukaže i predvidi uticaj različitog sadržaja Nd-Fe-B i/ili barijum feritnih čestica na morfološka, dinamičko mehanička i magnetna svojstava bonded magneta. Posmatrane su i analizirane interakcije između magnetnih prahova, kao i interakcije između magnetnih prahova i polimernog veziva i njihov uticaj na finalna svojstva bonded magneta. Za ispitivanje magnetnog ponašanja korišćen je vibraconi magnetometar (VSM). Različite veličine i oblici dobijenih histerezisnih krivih su poređeni i korišćeni za predviđanje svojstava ispitivanih kompozitnih materijala. Homogena raspodela magnetnih čestica u polimernoj matrici je potvrđena korišćenjem skenirajućeg elektronskog mikroskopa (SEM). Elastična svojstva i svojstvo prigušenja oscilacija ispitivano je korišćenjem dinamičko mehaničke analize (DMA) koja ukazuje na poboljšana svojstva kod hibridnih kompozita.
PB  - Association of Chemical Engineers of Serbia
T2  - Hemijska industrija
T1  - Hybrid Nd-Fe-B/barium ferrite magnetic materials with epoxy matrix
T1  - Hibdridni Nd-Fe-B/barijum-ferit magnetni materijali sa epoksi matricom
EP  - 308
IS  - 3
SP  - 301
VL  - 66
DO  - 10.2298/HEMIND111104098S
ER  - 

@article{
author = "Stajčić, Aleksandar and Stajić-Trošić, Jasna and Grujić, Aleksandar and Stijepović, Mirko and Lazić, Nada L. and Žák, Tomáš and Aleksić, Radoslav",
year = "2012",
abstract = "Lately, there has been great attention paid to the research of bonded hybrid composites with improved dynamic mechanical capacities capable of replacing bonded Nd-Fe-B magnetic materials, by using cheaper (ferrite) materials instead of the Nd-Fe-B powder while retaining the satisfying values of the maximum magnetic energy. The objective of this study is to assess how different contents of Nd-Fe-B and/or barium ferrite particles can affect morphological, dynamic mechanical and magnetic properties of bonded composite materials. The interactions between employed magnetic powders and the interactions between magnetic powders and polymer binder are considered. For the examination of the magnetic behaviour, a vibrating sample magnetometer (VSM) is used. Different shapes and sizes of the obtained hysteresis loops are used for comparison and prediction of the polymer bonded materials properties. The homogeneous distribution of the magnetic particles in the polymer matrix is validated using scanning electron microscopy (SEM). The elastic and damping behavior examined by dynamic mechanical analysis (DMA) show improved properties for hybrid composite materials., Istraživački trend u oblasti polimerom vezanih (bonded) Nd-Fe-B magnetnih materijala se reflektuje kroz razvoj bonded hibridnih kompozita sa poboljšanim dinamičko-mehaničkim svojstvima i primetno nižoj ceni zbog zamene skupe Nd- Fe-B legure jeftinijim magnetnim materijalima (ferit) uz postizanje zadovoljavajućih vrednosti maksimalne magnetne energije. Cilj ovog rada je da ukaže i predvidi uticaj različitog sadržaja Nd-Fe-B i/ili barijum feritnih čestica na morfološka, dinamičko mehanička i magnetna svojstava bonded magneta. Posmatrane su i analizirane interakcije između magnetnih prahova, kao i interakcije između magnetnih prahova i polimernog veziva i njihov uticaj na finalna svojstva bonded magneta. Za ispitivanje magnetnog ponašanja korišćen je vibraconi magnetometar (VSM). Različite veličine i oblici dobijenih histerezisnih krivih su poređeni i korišćeni za predviđanje svojstava ispitivanih kompozitnih materijala. Homogena raspodela magnetnih čestica u polimernoj matrici je potvrđena korišćenjem skenirajućeg elektronskog mikroskopa (SEM). Elastična svojstva i svojstvo prigušenja oscilacija ispitivano je korišćenjem dinamičko mehaničke analize (DMA) koja ukazuje na poboljšana svojstva kod hibridnih kompozita.",
publisher = "Association of Chemical Engineers of Serbia",
journal = "Hemijska industrija",
title = "Hybrid Nd-Fe-B/barium ferrite magnetic materials with epoxy matrix, Hibdridni Nd-Fe-B/barijum-ferit magnetni materijali sa epoksi matricom",
pages = "308-301",
number = "3",
volume = "66",
doi = "10.2298/HEMIND111104098S"
}

Stajčić, A., Stajić-Trošić, J., Grujić, A., Stijepović, M., Lazić, N. L., Žák, T.,& Aleksić, R.. (2012). Hybrid Nd-Fe-B/barium ferrite magnetic materials with epoxy matrix. in Hemijska industrija
Association of Chemical Engineers of Serbia., 66(3), 301-308.
https://doi.org/10.2298/HEMIND111104098S

Stajčić A, Stajić-Trošić J, Grujić A, Stijepović M, Lazić NL, Žák T, Aleksić R. Hybrid Nd-Fe-B/barium ferrite magnetic materials with epoxy matrix. in Hemijska industrija. 2012;66(3):301-308.
doi:10.2298/HEMIND111104098S .

Stajčić, Aleksandar, Stajić-Trošić, Jasna, Grujić, Aleksandar, Stijepović, Mirko, Lazić, Nada L., Žák, Tomáš, Aleksić, Radoslav, "Hybrid Nd-Fe-B/barium ferrite magnetic materials with epoxy matrix" in Hemijska industrija, 66, no. 3 (2012):301-308,
https://doi.org/10.2298/HEMIND111104098S . .

TY  - JOUR
AU  - Stijepović, Mirko
AU  - Linke, Patrick
AU  - Papadopoulos, Athanasios I.
AU  - Grujić, Aleksandar
PY  - 2012
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2225
AB  - The performance of ORC systems strongly depends on working fluid properties. We explore the relationships between working fluid properties and ORC common economic and thermodynamic performance criteria from a theoretical and an analytical point of view. The mapping of individual properties and performance criteria presented in this paper will provide a basis for the development of efficient and systematic strategies and approaches for ORC working fluid selection in future. Published by Elsevier Ltd.
PB  - Pergamon-Elsevier Science Ltd, Oxford
T2  - Applied Thermal Engineering
T1  - On the role of working fluid properties in Organic Rankine Cycle performance
EP  - 413
SP  - 406
VL  - 36
DO  - 10.1016/j.applthermaleng.2011.10.057
ER  - 

@article{
author = "Stijepović, Mirko and Linke, Patrick and Papadopoulos, Athanasios I. and Grujić, Aleksandar",
year = "2012",
abstract = "The performance of ORC systems strongly depends on working fluid properties. We explore the relationships between working fluid properties and ORC common economic and thermodynamic performance criteria from a theoretical and an analytical point of view. The mapping of individual properties and performance criteria presented in this paper will provide a basis for the development of efficient and systematic strategies and approaches for ORC working fluid selection in future. Published by Elsevier Ltd.",
publisher = "Pergamon-Elsevier Science Ltd, Oxford",
journal = "Applied Thermal Engineering",
title = "On the role of working fluid properties in Organic Rankine Cycle performance",
pages = "413-406",
volume = "36",
doi = "10.1016/j.applthermaleng.2011.10.057"
}

Stijepović, M., Linke, P., Papadopoulos, A. I.,& Grujić, A.. (2012). On the role of working fluid properties in Organic Rankine Cycle performance. in Applied Thermal Engineering
Pergamon-Elsevier Science Ltd, Oxford., 36, 406-413.
https://doi.org/10.1016/j.applthermaleng.2011.10.057

Stijepović M, Linke P, Papadopoulos AI, Grujić A. On the role of working fluid properties in Organic Rankine Cycle performance. in Applied Thermal Engineering. 2012;36:406-413.
doi:10.1016/j.applthermaleng.2011.10.057 .

Stijepović, Mirko, Linke, Patrick, Papadopoulos, Athanasios I., Grujić, Aleksandar, "On the role of working fluid properties in Organic Rankine Cycle performance" in Applied Thermal Engineering, 36 (2012):406-413,
https://doi.org/10.1016/j.applthermaleng.2011.10.057 . .

TY  - JOUR
AU  - Stijepović, Vladimir
AU  - Linke, Patrick
AU  - Alnouri, Sabla
AU  - Kijevčanin, Mirjana
AU  - Grujić, Aleksandar
AU  - Stijepović, Mirko
PY  - 2012
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2105
AB  - Environmental regulations imposed on transport fuels, especially specifications on sulfur and nitrogen content, generally boost hydrogen requirements in refining industries. The catalytic naphtha reformer (CNR) process is one of the major sources of hydrogen in naphtha refinery, thus improving its hydrogen production would be of great importance for refining industries. Close examination of the reaction kinetics of CNR processes has identified temperature, hydrogen concentration and catalyst activity as key variables affecting the process's performance. In this paper, a new reactor concept is developed that better exploits these process variables. The proposed membrane moving-bed reactor promises to significantly outperform the conventional continuous catalyst regenerative (CCR) design. A case study identifies improvements of 23.6 mol% in hydrogen production, 18.8 mol% in aromatics production. Moreover, the reformate yield was found to increase by 10.6 wt%, while the production of light gases decreases to a value of 18.6 wt%.
PB  - Pergamon-Elsevier Science Ltd, Oxford
T2  - International Journal of Hydrogen Energy
T1  - Toward enhanced hydrogen production in a catalytic naphtha reforming process
EP  - 11784
IS  - 16
SP  - 11772
VL  - 37
DO  - 10.1016/j.ijhydene.2012.05.103
ER  - 

@article{
author = "Stijepović, Vladimir and Linke, Patrick and Alnouri, Sabla and Kijevčanin, Mirjana and Grujić, Aleksandar and Stijepović, Mirko",
year = "2012",
abstract = "Environmental regulations imposed on transport fuels, especially specifications on sulfur and nitrogen content, generally boost hydrogen requirements in refining industries. The catalytic naphtha reformer (CNR) process is one of the major sources of hydrogen in naphtha refinery, thus improving its hydrogen production would be of great importance for refining industries. Close examination of the reaction kinetics of CNR processes has identified temperature, hydrogen concentration and catalyst activity as key variables affecting the process's performance. In this paper, a new reactor concept is developed that better exploits these process variables. The proposed membrane moving-bed reactor promises to significantly outperform the conventional continuous catalyst regenerative (CCR) design. A case study identifies improvements of 23.6 mol% in hydrogen production, 18.8 mol% in aromatics production. Moreover, the reformate yield was found to increase by 10.6 wt%, while the production of light gases decreases to a value of 18.6 wt%.",
publisher = "Pergamon-Elsevier Science Ltd, Oxford",
journal = "International Journal of Hydrogen Energy",
title = "Toward enhanced hydrogen production in a catalytic naphtha reforming process",
pages = "11784-11772",
number = "16",
volume = "37",
doi = "10.1016/j.ijhydene.2012.05.103"
}

Stijepović, V., Linke, P., Alnouri, S., Kijevčanin, M., Grujić, A.,& Stijepović, M.. (2012). Toward enhanced hydrogen production in a catalytic naphtha reforming process. in International Journal of Hydrogen Energy
Pergamon-Elsevier Science Ltd, Oxford., 37(16), 11772-11784.
https://doi.org/10.1016/j.ijhydene.2012.05.103

Stijepović V, Linke P, Alnouri S, Kijevčanin M, Grujić A, Stijepović M. Toward enhanced hydrogen production in a catalytic naphtha reforming process. in International Journal of Hydrogen Energy. 2012;37(16):11772-11784.
doi:10.1016/j.ijhydene.2012.05.103 .

Stijepović, Vladimir, Linke, Patrick, Alnouri, Sabla, Kijevčanin, Mirjana, Grujić, Aleksandar, Stijepović, Mirko, "Toward enhanced hydrogen production in a catalytic naphtha reforming process" in International Journal of Hydrogen Energy, 37, no. 16 (2012):11772-11784,
https://doi.org/10.1016/j.ijhydene.2012.05.103 . .

TY  - JOUR
AU  - Nedeljković, Dragutin
AU  - Stajčić, Aleksandar
AU  - Grujić, Aleksandar
AU  - Stajić-Trošić, Jasna
AU  - Zrilić, Milorad
AU  - Stevanović, Jasmina
AU  - Drmanić, Saša
PY  - 2012
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/1983
AB  - The main task of the work is to construct the polymeric membrane that could be used for the waste gases treatment. For this purpose, membrane must have high permeability for the carbon dioxide and low permeability of the other gases commonly present in waste gases (hydrogen, oxygen, nitrogen and methane). The constructed membranes were of a dense type, based on a solubility/diffusivity mechanism. In this paper, feasibility of the application of poly(ethyleneoxid)-copoly(phtalamide) was tested. In order to enchase the permeability of carbon dioxide, four different zeolites were added, and in order to improve mechanical stability two different additives were tested. Three zeolites were with the 3-dimensional pores (ZSM5; Faujasite Linde type A) and one was with the 1-dimensional pores (Linde type L). As an additive, n-tetradecyldimethylamonium bromide - n-C14TMABr was tested. The aim of an additive was to provide good wetting of a highly electrically charged zeolite particle by the hydrophobic polymer chains. The other examined additive was dimethylaminopyridine (DMAP) which should improve the solubility of carbon dioxide due to its alkali properties. The best results in carbon dioxide/hydrogen selectivity and permeability were obtained with the membrane constructed with PEBAX 1657 and surface treated zeolite.
PB  - Inst Materials Physics, Bucharest
T2  - Digest Journal of Nanomaterials and Biostructures
T1  - The application of zeolite nanopowder for the construction of the dense composite polymer membranes for carbon dioxide separation
EP  - 278
IS  - 1
SP  - 269
VL  - 7
UR  - https://hdl.handle.net/21.15107/rcub_technorep_1983
ER  - 

@article{
author = "Nedeljković, Dragutin and Stajčić, Aleksandar and Grujić, Aleksandar and Stajić-Trošić, Jasna and Zrilić, Milorad and Stevanović, Jasmina and Drmanić, Saša",
year = "2012",
abstract = "The main task of the work is to construct the polymeric membrane that could be used for the waste gases treatment. For this purpose, membrane must have high permeability for the carbon dioxide and low permeability of the other gases commonly present in waste gases (hydrogen, oxygen, nitrogen and methane). The constructed membranes were of a dense type, based on a solubility/diffusivity mechanism. In this paper, feasibility of the application of poly(ethyleneoxid)-copoly(phtalamide) was tested. In order to enchase the permeability of carbon dioxide, four different zeolites were added, and in order to improve mechanical stability two different additives were tested. Three zeolites were with the 3-dimensional pores (ZSM5; Faujasite Linde type A) and one was with the 1-dimensional pores (Linde type L). As an additive, n-tetradecyldimethylamonium bromide - n-C14TMABr was tested. The aim of an additive was to provide good wetting of a highly electrically charged zeolite particle by the hydrophobic polymer chains. The other examined additive was dimethylaminopyridine (DMAP) which should improve the solubility of carbon dioxide due to its alkali properties. The best results in carbon dioxide/hydrogen selectivity and permeability were obtained with the membrane constructed with PEBAX 1657 and surface treated zeolite.",
publisher = "Inst Materials Physics, Bucharest",
journal = "Digest Journal of Nanomaterials and Biostructures",
title = "The application of zeolite nanopowder for the construction of the dense composite polymer membranes for carbon dioxide separation",
pages = "278-269",
number = "1",
volume = "7",
url = "https://hdl.handle.net/21.15107/rcub_technorep_1983"
}

Nedeljković, D., Stajčić, A., Grujić, A., Stajić-Trošić, J., Zrilić, M., Stevanović, J.,& Drmanić, S.. (2012). The application of zeolite nanopowder for the construction of the dense composite polymer membranes for carbon dioxide separation. in Digest Journal of Nanomaterials and Biostructures
Inst Materials Physics, Bucharest., 7(1), 269-278.
https://hdl.handle.net/21.15107/rcub_technorep_1983

Nedeljković D, Stajčić A, Grujić A, Stajić-Trošić J, Zrilić M, Stevanović J, Drmanić S. The application of zeolite nanopowder for the construction of the dense composite polymer membranes for carbon dioxide separation. in Digest Journal of Nanomaterials and Biostructures. 2012;7(1):269-278.
https://hdl.handle.net/21.15107/rcub_technorep_1983 .

Nedeljković, Dragutin, Stajčić, Aleksandar, Grujić, Aleksandar, Stajić-Trošić, Jasna, Zrilić, Milorad, Stevanović, Jasmina, Drmanić, Saša, "The application of zeolite nanopowder for the construction of the dense composite polymer membranes for carbon dioxide separation" in Digest Journal of Nanomaterials and Biostructures, 7, no. 1 (2012):269-278,
https://hdl.handle.net/21.15107/rcub_technorep_1983 .