TY  - JOUR
AU  - Grujić, Aleksandar
AU  - Nedeljković, Dragutin
AU  - Stajić-Trošić, Jasna
AU  - Stijepović, Mirko Z.
AU  - Alnouri, Sabla
AU  - Perišić, Srđan
PY  - 2023
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/6371
AB  - Polymer-bonded magnets are a class of composite material that combines the magnetic properties of metal particles and the molding possibility of a polymeric matrix. This class of materials has shown huge potential for various applications in industry and engineering. Traditional research in this field has so far mainly focused on mechanical, electrical or magnetic properties of the composite, or on particle size and distribution. This examination of synthesized Nd-Fe-B-epoxy composite materials includes the mutual comparison of impact toughness, fatigue, and the structural, thermal, dynamic-mechanical, and magnetic behavior of materials with different content of magnetic Nd-Fe-B particles, in a wide range from 5 to 95 wt.%. This paper tests the influence of the Nd-Fe-B content on impacting the toughness of the composite material, as this relationship has not been tested before. The results show that impact toughness decreases, while magnetic properties increase, along with increasing content of Nd-Fe-B. Based on the observed trends, selected samples have been analyzed in terms of crack growth rate behavior. Analysis of the fracture surface morphology reveals the formation of a stable and homogeneous composite material. The synthesis route, the applied methods of characterization and analysis, and the comparison of the obtained results can provide a composite material with optimum properties for a specific purpose.
PB  - MDPI
T2  - Polymers
T1  - Magneto-Mechanical and Thermal Properties of Nd-Fe-B-Epoxy-Bonded Composite Materials
IS  - 8
SP  - 1894
VL  - 15
DO  - 10.3390/polym15081894
ER  - 

@article{
author = "Grujić, Aleksandar and Nedeljković, Dragutin and Stajić-Trošić, Jasna and Stijepović, Mirko Z. and Alnouri, Sabla and Perišić, Srđan",
year = "2023",
abstract = "Polymer-bonded magnets are a class of composite material that combines the magnetic properties of metal particles and the molding possibility of a polymeric matrix. This class of materials has shown huge potential for various applications in industry and engineering. Traditional research in this field has so far mainly focused on mechanical, electrical or magnetic properties of the composite, or on particle size and distribution. This examination of synthesized Nd-Fe-B-epoxy composite materials includes the mutual comparison of impact toughness, fatigue, and the structural, thermal, dynamic-mechanical, and magnetic behavior of materials with different content of magnetic Nd-Fe-B particles, in a wide range from 5 to 95 wt.%. This paper tests the influence of the Nd-Fe-B content on impacting the toughness of the composite material, as this relationship has not been tested before. The results show that impact toughness decreases, while magnetic properties increase, along with increasing content of Nd-Fe-B. Based on the observed trends, selected samples have been analyzed in terms of crack growth rate behavior. Analysis of the fracture surface morphology reveals the formation of a stable and homogeneous composite material. The synthesis route, the applied methods of characterization and analysis, and the comparison of the obtained results can provide a composite material with optimum properties for a specific purpose.",
publisher = "MDPI",
journal = "Polymers",
title = "Magneto-Mechanical and Thermal Properties of Nd-Fe-B-Epoxy-Bonded Composite Materials",
number = "8",
pages = "1894",
volume = "15",
doi = "10.3390/polym15081894"
}

Grujić, A., Nedeljković, D., Stajić-Trošić, J., Stijepović, M. Z., Alnouri, S.,& Perišić, S.. (2023). Magneto-Mechanical and Thermal Properties of Nd-Fe-B-Epoxy-Bonded Composite Materials. in Polymers
MDPI., 15(8), 1894.
https://doi.org/10.3390/polym15081894

Grujić A, Nedeljković D, Stajić-Trošić J, Stijepović MZ, Alnouri S, Perišić S. Magneto-Mechanical and Thermal Properties of Nd-Fe-B-Epoxy-Bonded Composite Materials. in Polymers. 2023;15(8):1894.
doi:10.3390/polym15081894 .

Grujić, Aleksandar, Nedeljković, Dragutin, Stajić-Trošić, Jasna, Stijepović, Mirko Z., Alnouri, Sabla, Perišić, Srđan, "Magneto-Mechanical and Thermal Properties of Nd-Fe-B-Epoxy-Bonded Composite Materials" in Polymers, 15, no. 8 (2023):1894,
https://doi.org/10.3390/polym15081894 . .

TY  - JOUR
AU  - Stijepović, Mirko
AU  - Alnouri, Sabla
AU  - Stijepović, Vladimir
AU  - Stajić-Trošić, Jasna
AU  - Grozdanić, Nikola
AU  - Grujić, Aleksandar
PY  - 2022
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/5108
AB  - This paper introduces solute-solvent interactions onto a universal transport modeling approach that has been recently introduced for predicting RO membrane performance. The mathematical modeling framework utilizes chemical potential calculations rather than concentrations, and is based on the standard solution diffusion theory. Accounting for solute-solvent interactions were all based on a Maxwell-Stefan approach for reduced motion of particles in membrane pores. Overall, the proposed model is very effective in generating all the necessary parameters, especially for estimating the water permeability, as well as the various permeabilities associated with both, monovalent and divalent types of ion in the solution. Moreover, the effects of osmotic pressure on the respective species and water flux can be estimated. The proposed RO model was found to be very efficient in predicting the performance of various types of membranes, and its performance has been validated against available membrane performance data obtained from various sources. Since the attained model predictions are in very good agreement with actual membrane performance data, the proposed model can be considered as a very effective tool for use in commercial process simulator platforms.
PB  - Elsevier Ltd
T2  - Computers and Chemical Engineering
T1  - The development of a process simulator transport model for RO systems
SP  - 107783
VL  - 161
DO  - 10.1016/j.compchemeng.2022.107783
ER  - 

@article{
author = "Stijepović, Mirko and Alnouri, Sabla and Stijepović, Vladimir and Stajić-Trošić, Jasna and Grozdanić, Nikola and Grujić, Aleksandar",
year = "2022",
abstract = "This paper introduces solute-solvent interactions onto a universal transport modeling approach that has been recently introduced for predicting RO membrane performance. The mathematical modeling framework utilizes chemical potential calculations rather than concentrations, and is based on the standard solution diffusion theory. Accounting for solute-solvent interactions were all based on a Maxwell-Stefan approach for reduced motion of particles in membrane pores. Overall, the proposed model is very effective in generating all the necessary parameters, especially for estimating the water permeability, as well as the various permeabilities associated with both, monovalent and divalent types of ion in the solution. Moreover, the effects of osmotic pressure on the respective species and water flux can be estimated. The proposed RO model was found to be very efficient in predicting the performance of various types of membranes, and its performance has been validated against available membrane performance data obtained from various sources. Since the attained model predictions are in very good agreement with actual membrane performance data, the proposed model can be considered as a very effective tool for use in commercial process simulator platforms.",
publisher = "Elsevier Ltd",
journal = "Computers and Chemical Engineering",
title = "The development of a process simulator transport model for RO systems",
pages = "107783",
volume = "161",
doi = "10.1016/j.compchemeng.2022.107783"
}

Stijepović, M., Alnouri, S., Stijepović, V., Stajić-Trošić, J., Grozdanić, N.,& Grujić, A.. (2022). The development of a process simulator transport model for RO systems. in Computers and Chemical Engineering
Elsevier Ltd., 161, 107783.
https://doi.org/10.1016/j.compchemeng.2022.107783

Stijepović M, Alnouri S, Stijepović V, Stajić-Trošić J, Grozdanić N, Grujić A. The development of a process simulator transport model for RO systems. in Computers and Chemical Engineering. 2022;161:107783.
doi:10.1016/j.compchemeng.2022.107783 .

Stijepović, Mirko, Alnouri, Sabla, Stijepović, Vladimir, Stajić-Trošić, Jasna, Grozdanić, Nikola, Grujić, Aleksandar, "The development of a process simulator transport model for RO systems" in Computers and Chemical Engineering, 161 (2022):107783,
https://doi.org/10.1016/j.compchemeng.2022.107783 . .

TY  - JOUR
AU  - Putic, Lana
AU  - Alnouri, Sabla
AU  - Stijepovic, Vladimir
AU  - Stajic-Trosic, Jasna
AU  - Grujic, Aleksandar
AU  - Stijepović, Mirko
PY  - 2021
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/4892
AB  - This paper presents a new transport model for reverse osmosis (RO) systems, which combines irreversible thermodynamics, together with solution-diffusion theory. The simplifications adopted by the classical theory for solution-diffusion mechanisms have been found to be quite lacking when it comes to predicting the separation of multicomponent mixtures. The presented model accounts for multicomponent computations through the application of thermodynamic property models, as a means to predict the various interactions amongst the species that are present in solution. The developed transport model is relatively easy to implement, and can be utilized alongside existing equipment and thermodynamic property models. The applicability of the model presented in this paper has been tested on three different case studies, including a case that investigates single component behavior and a case that investigates multicomponent behavior The proposed model shows very good agreement with experimental results .
T2  - Computers & Chemical Engineering
T1  - A universal transportation model for reverse osmosis systems
VL  - 148
DO  - 10.1016/j.compchemeng.2021.107264
ER  - 

@article{
author = "Putic, Lana and Alnouri, Sabla and Stijepovic, Vladimir and Stajic-Trosic, Jasna and Grujic, Aleksandar and Stijepović, Mirko",
year = "2021",
abstract = "This paper presents a new transport model for reverse osmosis (RO) systems, which combines irreversible thermodynamics, together with solution-diffusion theory. The simplifications adopted by the classical theory for solution-diffusion mechanisms have been found to be quite lacking when it comes to predicting the separation of multicomponent mixtures. The presented model accounts for multicomponent computations through the application of thermodynamic property models, as a means to predict the various interactions amongst the species that are present in solution. The developed transport model is relatively easy to implement, and can be utilized alongside existing equipment and thermodynamic property models. The applicability of the model presented in this paper has been tested on three different case studies, including a case that investigates single component behavior and a case that investigates multicomponent behavior The proposed model shows very good agreement with experimental results .",
journal = "Computers & Chemical Engineering",
title = "A universal transportation model for reverse osmosis systems",
volume = "148",
doi = "10.1016/j.compchemeng.2021.107264"
}

Putic, L., Alnouri, S., Stijepovic, V., Stajic-Trosic, J., Grujic, A.,& Stijepović, M.. (2021). A universal transportation model for reverse osmosis systems. in Computers & Chemical Engineering, 148.
https://doi.org/10.1016/j.compchemeng.2021.107264

Putic L, Alnouri S, Stijepovic V, Stajic-Trosic J, Grujic A, Stijepović M. A universal transportation model for reverse osmosis systems. in Computers & Chemical Engineering. 2021;148.
doi:10.1016/j.compchemeng.2021.107264 .

Putic, Lana, Alnouri, Sabla, Stijepovic, Vladimir, Stajic-Trosic, Jasna, Grujic, Aleksandar, Stijepović, Mirko, "A universal transportation model for reverse osmosis systems" in Computers & Chemical Engineering, 148 (2021),
https://doi.org/10.1016/j.compchemeng.2021.107264 . .

TY  - JOUR
AU  - Alnouri, Sabla
AU  - Linke, Patrick
AU  - Stijepović, Mirko
AU  - El-Halwagi, Mahmoud
PY  - 2016
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/3332
AB  - Studies involving the design of interplant water networks have received significant attention over the past few years. Many methods have been developed to assist in obtaining efficient water reuse network design schemes, mainly using fundamental concepts of water integration. Our recent work has presented the importance of considering spatial constraints in the form of utility corridor availability, when identifying cost-effective interplant water network arrangements in industrial zones (Alnouri et al., [2014]: Clean Technologies and Environmental Policy 16, 1637-1659). This article extends the scope of our previous work by enabling the identification of new corridor locations, which could potentially be used alongside existing utility infrastructure. We present an optimization framework that allows unutilized areas of land within industrial zones to be sectioned off and added as optional transportation channels, together with existing utility corridor regions, in the course of attaining cost-effective interplant water network designs. The methodology entails that identification of optimal wastewater reuse schemes among various processing entities, by exploring options for enhanced utility corridors. As an illustration, several cases that utilize an assumed layout for an industrial zone have been carried out, in which a number of unutilized regions of land were identified to exist. Several opportunities that allow for potential corridor additions onto existing corridor infrastructure, through the exploitation of unutilized regions of land within the plot, were explored. A number of improvements in the water network designs obtained are highlighted for the different case scenarios that have been investigated, using the proposed approach.
PB  - Wiley-Blackwell, Hoboken
T2  - Environmental Progress & Sustainable Energy
T1  - On the identification of optimal utility corridor locations in interplant water network synthesis
EP  - 1511
IS  - 5
SP  - 1492
VL  - 35
DO  - 10.1002/ep.12364
ER  - 

@article{
author = "Alnouri, Sabla and Linke, Patrick and Stijepović, Mirko and El-Halwagi, Mahmoud",
year = "2016",
abstract = "Studies involving the design of interplant water networks have received significant attention over the past few years. Many methods have been developed to assist in obtaining efficient water reuse network design schemes, mainly using fundamental concepts of water integration. Our recent work has presented the importance of considering spatial constraints in the form of utility corridor availability, when identifying cost-effective interplant water network arrangements in industrial zones (Alnouri et al., [2014]: Clean Technologies and Environmental Policy 16, 1637-1659). This article extends the scope of our previous work by enabling the identification of new corridor locations, which could potentially be used alongside existing utility infrastructure. We present an optimization framework that allows unutilized areas of land within industrial zones to be sectioned off and added as optional transportation channels, together with existing utility corridor regions, in the course of attaining cost-effective interplant water network designs. The methodology entails that identification of optimal wastewater reuse schemes among various processing entities, by exploring options for enhanced utility corridors. As an illustration, several cases that utilize an assumed layout for an industrial zone have been carried out, in which a number of unutilized regions of land were identified to exist. Several opportunities that allow for potential corridor additions onto existing corridor infrastructure, through the exploitation of unutilized regions of land within the plot, were explored. A number of improvements in the water network designs obtained are highlighted for the different case scenarios that have been investigated, using the proposed approach.",
publisher = "Wiley-Blackwell, Hoboken",
journal = "Environmental Progress & Sustainable Energy",
title = "On the identification of optimal utility corridor locations in interplant water network synthesis",
pages = "1511-1492",
number = "5",
volume = "35",
doi = "10.1002/ep.12364"
}

Alnouri, S., Linke, P., Stijepović, M.,& El-Halwagi, M.. (2016). On the identification of optimal utility corridor locations in interplant water network synthesis. in Environmental Progress & Sustainable Energy
Wiley-Blackwell, Hoboken., 35(5), 1492-1511.
https://doi.org/10.1002/ep.12364

Alnouri S, Linke P, Stijepović M, El-Halwagi M. On the identification of optimal utility corridor locations in interplant water network synthesis. in Environmental Progress & Sustainable Energy. 2016;35(5):1492-1511.
doi:10.1002/ep.12364 .

Alnouri, Sabla, Linke, Patrick, Stijepović, Mirko, El-Halwagi, Mahmoud, "On the identification of optimal utility corridor locations in interplant water network synthesis" in Environmental Progress & Sustainable Energy, 35, no. 5 (2016):1492-1511,
https://doi.org/10.1002/ep.12364 . .

TY  - JOUR
AU  - Alnouri, Sabla
AU  - Stijepović, Mirko
AU  - Linke, Patrick
AU  - El-Halwagi, Mahmoud
PY  - 2014
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2725
AB  - In this work, an industrial city spatial representation that accounts for different plant layouts and arrangements is utilized for interplant water network synthesis. The problem has been previously tackled using deterministic optimization methods. This work employs a stochastic optimization approach, using genetic algorithms, for the design of spatially constrained interplant water networks using direct recycling techniques. The approach identifies well-performing solutions in an evolutionary manner, by generating populations of candidate solutions, then sampling regions that are associated with the highest performance probabilities. This ensures that only the fittest designs survive, when evaluating the network performance. A fitness objective that accounts for both freshwater and piping costs was utilized in the design evaluation stage. When compared to the results that have been obtained using deterministic optimization, trade-off trends between the optimum cost of the network and fresh/waste targets were manifested by means of stochastic optimization. Enhanced network performance was attained for a reduced total cost, at the expense of a certain deviation from fresh/waste targets.
PB  - Aidic Servizi Srl, Milano
T2  - Pres 2014, 17th Conference on Process Integration, Modelling and Optimisation for Energy Saving and
T1  - Optimal Design of Spatially Constrained Interplant Water Networks with Direct Recycling Techniques using Genetic Algorithms
EP  - +
SP  - 457
VL  - 39
DO  - 10.3303/CET1439077
ER  - 

@article{
author = "Alnouri, Sabla and Stijepović, Mirko and Linke, Patrick and El-Halwagi, Mahmoud",
year = "2014",
abstract = "In this work, an industrial city spatial representation that accounts for different plant layouts and arrangements is utilized for interplant water network synthesis. The problem has been previously tackled using deterministic optimization methods. This work employs a stochastic optimization approach, using genetic algorithms, for the design of spatially constrained interplant water networks using direct recycling techniques. The approach identifies well-performing solutions in an evolutionary manner, by generating populations of candidate solutions, then sampling regions that are associated with the highest performance probabilities. This ensures that only the fittest designs survive, when evaluating the network performance. A fitness objective that accounts for both freshwater and piping costs was utilized in the design evaluation stage. When compared to the results that have been obtained using deterministic optimization, trade-off trends between the optimum cost of the network and fresh/waste targets were manifested by means of stochastic optimization. Enhanced network performance was attained for a reduced total cost, at the expense of a certain deviation from fresh/waste targets.",
publisher = "Aidic Servizi Srl, Milano",
journal = "Pres 2014, 17th Conference on Process Integration, Modelling and Optimisation for Energy Saving and",
title = "Optimal Design of Spatially Constrained Interplant Water Networks with Direct Recycling Techniques using Genetic Algorithms",
pages = "+-457",
volume = "39",
doi = "10.3303/CET1439077"
}

Alnouri, S., Stijepović, M., Linke, P.,& El-Halwagi, M.. (2014). Optimal Design of Spatially Constrained Interplant Water Networks with Direct Recycling Techniques using Genetic Algorithms. in Pres 2014, 17th Conference on Process Integration, Modelling and Optimisation for Energy Saving and
Aidic Servizi Srl, Milano., 39, 457-+.
https://doi.org/10.3303/CET1439077

Alnouri S, Stijepović M, Linke P, El-Halwagi M. Optimal Design of Spatially Constrained Interplant Water Networks with Direct Recycling Techniques using Genetic Algorithms. in Pres 2014, 17th Conference on Process Integration, Modelling and Optimisation for Energy Saving and. 2014;39:457-+.
doi:10.3303/CET1439077 .

Alnouri, Sabla, Stijepović, Mirko, Linke, Patrick, El-Halwagi, Mahmoud, "Optimal Design of Spatially Constrained Interplant Water Networks with Direct Recycling Techniques using Genetic Algorithms" in Pres 2014, 17th Conference on Process Integration, Modelling and Optimisation for Energy Saving and, 39 (2014):457-+,
https://doi.org/10.3303/CET1439077 . .

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 . .