TY  - JOUR
AU  - Prokić-Vidojević, Dragana
AU  - Glišić, Sandra B.
AU  - Pešić, Radojica
AU  - Orlović, Aleksandar M.
PY  - 2022
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/5184
AB  - Re/Pd-TiO2/SiO2 aerogel catalysts were synthesized by using a sol-gel method and supercritical drying in excess solvent and investigated in the reaction of hydrodesulphurisation (HDS) of dibenzothiophene (DBT) and 4,6-dimethyl dibenzothiophene (4,6-DMDBT). Both Re/Pd catalysts, obtained with and without the use of mesitylene in the synthesis step, have shown increased conversions of up to 70 % in the desulphurization of 4,6-DMDBT, when compared to conventional Co/Mo hydroprocessing catalysts. This observation is of importance for conversion of highly refractory 4,6-DMDBT and hydroprocessing to produce ultra-low sulphur diesel fuels, ULSD. In order to quantify the extent of desulphurisation, which proceeds via a hydrogenation route, conversions of DBT and 4,6-DMDBT along with evolution of reaction products characteristic for the direct desulphurisation route and the hydrogenation route were monitored by using a gas chromatography–mass spectrometry (GC-MS) analytical technique. The reaction was performed at 630 K and 6 MPa in a batch catalytic reactor. The experimental results were used in the Hougen-Watson kinetic model describing DBT and 4,6-DMDBT desulphurisation on σ and τ active sites. Kinetic parameters of this complex catalytic kinetics were determined by using a Genetic Algorithm method and minimum deviation function. Values of calculated kinetic parameters and values of the ratio of 3-methylcyclohexyltoluene (MCHT and dimethyl biphenyl (DMBPH) expressed as the MCHT/(MCHT+DMBPH) ratio ranging between 0.66 and 0.94, have confirmed that the hydrogenation route is the dominant route for desulphurisation of 4,6-DMDBT.
PB  - Association of the Chemical Engineers of Serbia
T2  - Hemijska industrija
T1  - Desulphurisation of dibenzothiophene and 4,6 – dimethyl dibenzothio-phene via enhanced hydrogenation reaction route using RePd–TiO2/SiO2 aerogel catalysts: Kinetic parameters estimation and modelling
T1  - Desulfurizacija dibenzotiofena i 4,6 – dimetildibenzotiofena procesom hidrogenovanja uz korišćenje RePd–TiO2/SiO2 aerogel katalizatora: proračun kinetičkih parametara i simulacijaprocesa
EP  - 145
IS  - 3
SP  - 135
VL  - 76
DO  - 10.2298/HEMIND220114008P
ER  - 

@article{
author = "Prokić-Vidojević, Dragana and Glišić, Sandra B. and Pešić, Radojica and Orlović, Aleksandar M.",
year = "2022",
abstract = "Re/Pd-TiO2/SiO2 aerogel catalysts were synthesized by using a sol-gel method and supercritical drying in excess solvent and investigated in the reaction of hydrodesulphurisation (HDS) of dibenzothiophene (DBT) and 4,6-dimethyl dibenzothiophene (4,6-DMDBT). Both Re/Pd catalysts, obtained with and without the use of mesitylene in the synthesis step, have shown increased conversions of up to 70 % in the desulphurization of 4,6-DMDBT, when compared to conventional Co/Mo hydroprocessing catalysts. This observation is of importance for conversion of highly refractory 4,6-DMDBT and hydroprocessing to produce ultra-low sulphur diesel fuels, ULSD. In order to quantify the extent of desulphurisation, which proceeds via a hydrogenation route, conversions of DBT and 4,6-DMDBT along with evolution of reaction products characteristic for the direct desulphurisation route and the hydrogenation route were monitored by using a gas chromatography–mass spectrometry (GC-MS) analytical technique. The reaction was performed at 630 K and 6 MPa in a batch catalytic reactor. The experimental results were used in the Hougen-Watson kinetic model describing DBT and 4,6-DMDBT desulphurisation on σ and τ active sites. Kinetic parameters of this complex catalytic kinetics were determined by using a Genetic Algorithm method and minimum deviation function. Values of calculated kinetic parameters and values of the ratio of 3-methylcyclohexyltoluene (MCHT and dimethyl biphenyl (DMBPH) expressed as the MCHT/(MCHT+DMBPH) ratio ranging between 0.66 and 0.94, have confirmed that the hydrogenation route is the dominant route for desulphurisation of 4,6-DMDBT.",
publisher = "Association of the Chemical Engineers of Serbia",
journal = "Hemijska industrija",
title = "Desulphurisation of dibenzothiophene and 4,6 – dimethyl dibenzothio-phene via enhanced hydrogenation reaction route using RePd–TiO2/SiO2 aerogel catalysts: Kinetic parameters estimation and modelling, Desulfurizacija dibenzotiofena i 4,6 – dimetildibenzotiofena procesom hidrogenovanja uz korišćenje RePd–TiO2/SiO2 aerogel katalizatora: proračun kinetičkih parametara i simulacijaprocesa",
pages = "145-135",
number = "3",
volume = "76",
doi = "10.2298/HEMIND220114008P"
}

Prokić-Vidojević, D., Glišić, S. B., Pešić, R.,& Orlović, A. M.. (2022). Desulphurisation of dibenzothiophene and 4,6 – dimethyl dibenzothio-phene via enhanced hydrogenation reaction route using RePd–TiO2/SiO2 aerogel catalysts: Kinetic parameters estimation and modelling. in Hemijska industrija
Association of the Chemical Engineers of Serbia., 76(3), 135-145.
https://doi.org/10.2298/HEMIND220114008P

Prokić-Vidojević D, Glišić SB, Pešić R, Orlović AM. Desulphurisation of dibenzothiophene and 4,6 – dimethyl dibenzothio-phene via enhanced hydrogenation reaction route using RePd–TiO2/SiO2 aerogel catalysts: Kinetic parameters estimation and modelling. in Hemijska industrija. 2022;76(3):135-145.
doi:10.2298/HEMIND220114008P .

Prokić-Vidojević, Dragana, Glišić, Sandra B., Pešić, Radojica, Orlović, Aleksandar M., "Desulphurisation of dibenzothiophene and 4,6 – dimethyl dibenzothio-phene via enhanced hydrogenation reaction route using RePd–TiO2/SiO2 aerogel catalysts: Kinetic parameters estimation and modelling" in Hemijska industrija, 76, no. 3 (2022):135-145,
https://doi.org/10.2298/HEMIND220114008P . .

TY  - JOUR
AU  - Glišić, Sandra
AU  - Orlović, Aleksandar
PY  - 2021
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/4849
AB  - Over the years, the hydrotreating process has been considerably improved in order to facilitate the production of environmentally friendly diesel fuels by reducing sulphur and aromatics concentrations, as mandated by contemporary emissions regulations. In this study, different kinetic models for the hydrodearomatisation reaction and the influence of reaction rate on performance of the industrial trickle bed reactor for hydrotreating of gas oil and light cycle oil fractions were analysed. The impact on reactor temperature, catalyst wetting efficiency, and conversion of sulphur and aromatics were determined. The results of simulations were compared with experimental data from an industrial test run and the best model for the observed process is proposed. Reactor performance and overall efficiency of the process is strongly dependent on the kinetics of hydrodearomatisaton with respect to aromatics conversion but even more so with respect to the temperature increase in the reactor, which affects all key catalytic reaction parameters, catalyst wetting efficiency, and thus the sulphur conversion. Based on the obtained simulation results, it could be concluded that reactor performance is strongly dependent on the hydrodearomatisation reaction. The best predictions of outlet temperature as well as sulphur and aromatic conversion (deviation from the experimental value 0.87 K, 0.01% and 2.57%, respectively) are achieved with the Langmuir-Hinshelwood kinetic model proposed by Owusu-Boakye.
T2  - Energies
T1  - The Influence of Hydrodearomatisation Reaction Kinetics on the Modelling of Sulphur and Aromatics Removal from Diesel Fuel in an Industrial Hydrotreating Process
IS  - 15
VL  - 14
DO  - 10.3390/en14154616
ER  - 

@article{
author = "Glišić, Sandra and Orlović, Aleksandar",
year = "2021",
abstract = "Over the years, the hydrotreating process has been considerably improved in order to facilitate the production of environmentally friendly diesel fuels by reducing sulphur and aromatics concentrations, as mandated by contemporary emissions regulations. In this study, different kinetic models for the hydrodearomatisation reaction and the influence of reaction rate on performance of the industrial trickle bed reactor for hydrotreating of gas oil and light cycle oil fractions were analysed. The impact on reactor temperature, catalyst wetting efficiency, and conversion of sulphur and aromatics were determined. The results of simulations were compared with experimental data from an industrial test run and the best model for the observed process is proposed. Reactor performance and overall efficiency of the process is strongly dependent on the kinetics of hydrodearomatisaton with respect to aromatics conversion but even more so with respect to the temperature increase in the reactor, which affects all key catalytic reaction parameters, catalyst wetting efficiency, and thus the sulphur conversion. Based on the obtained simulation results, it could be concluded that reactor performance is strongly dependent on the hydrodearomatisation reaction. The best predictions of outlet temperature as well as sulphur and aromatic conversion (deviation from the experimental value 0.87 K, 0.01% and 2.57%, respectively) are achieved with the Langmuir-Hinshelwood kinetic model proposed by Owusu-Boakye.",
journal = "Energies",
title = "The Influence of Hydrodearomatisation Reaction Kinetics on the Modelling of Sulphur and Aromatics Removal from Diesel Fuel in an Industrial Hydrotreating Process",
number = "15",
volume = "14",
doi = "10.3390/en14154616"
}

Glišić, S.,& Orlović, A.. (2021). The Influence of Hydrodearomatisation Reaction Kinetics on the Modelling of Sulphur and Aromatics Removal from Diesel Fuel in an Industrial Hydrotreating Process. in Energies, 14(15).
https://doi.org/10.3390/en14154616

Glišić S, Orlović A. The Influence of Hydrodearomatisation Reaction Kinetics on the Modelling of Sulphur and Aromatics Removal from Diesel Fuel in an Industrial Hydrotreating Process. in Energies. 2021;14(15).
doi:10.3390/en14154616 .

Glišić, Sandra, Orlović, Aleksandar, "The Influence of Hydrodearomatisation Reaction Kinetics on the Modelling of Sulphur and Aromatics Removal from Diesel Fuel in an Industrial Hydrotreating Process" in Energies, 14, no. 15 (2021),
https://doi.org/10.3390/en14154616 . .

TY  - JOUR
AU  - Prokić-Vidojević, Dragana
AU  - Glišić, Sandra
AU  - Krstić, Jugoslav B.
AU  - Orlović, Aleksandar
PY  - 2021
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/4860
AB  - Re/Pd-TiO2/SiO2 and Co/Mo-Al2O3/SiO2 aerogel catalysts were synthesized using sol-gel method and super-critical drying in excess solvent, and investigated in the hydrodesulphurisation (HDS) of dibenzothiophene (DBT) and 4,6-dimethyl dibenzothiophene (4,6-DMDBT). The influence of supercritical drying on the final catalytic properties of the materials was determined by parallel synthesis of aerogels and xerogels for Re/Pd-TiO2/SiO2 catalysts. The sol-gel method and supercritical drying were found to result in amorphous aerogels with relatively high degree of uniformity, of both supports and active phases. Corresponding xerogels were found to be similar to aerogels in terms of composition and structure, but characterized by lower specific surface areas. Catalytic activity of Co/Mo-Al2O3/SiO2 aerogel catalysts in HDS of DBT and 4,6-DMDBT has shown no major improvement in comparison to conventional Co/Mo catalyst. On the other hand, Re/Pd-TiO2/SiO2 aerogels, obtained with the addition of mesitylene or without it, achieved 70 % and 64 % higher conversion of 4,6-DMDBT than conventional Co/Mo catalyst, respectively. Increased catalytic activity can be attributed to well dispersed Re and Pd active phases across the catalyst structure, good incorporation of Ti within silica matrix, increased mesopore volumes and high specific surface areas.
T2  - Catalysis Today
T1  - Aerogel Re/Pd-TiO2/SiO2 and Co/Mo-Al2O3/SiO2 catalysts for hydrodesulphurisation of dibenzothiophene and 4,6-dimethyldibenzothiophene
EP  - 23
SP  - 10
VL  - 378
DO  - 10.1016/j.cattod.2020.11.022
ER  - 

@article{
author = "Prokić-Vidojević, Dragana and Glišić, Sandra and Krstić, Jugoslav B. and Orlović, Aleksandar",
year = "2021",
abstract = "Re/Pd-TiO2/SiO2 and Co/Mo-Al2O3/SiO2 aerogel catalysts were synthesized using sol-gel method and super-critical drying in excess solvent, and investigated in the hydrodesulphurisation (HDS) of dibenzothiophene (DBT) and 4,6-dimethyl dibenzothiophene (4,6-DMDBT). The influence of supercritical drying on the final catalytic properties of the materials was determined by parallel synthesis of aerogels and xerogels for Re/Pd-TiO2/SiO2 catalysts. The sol-gel method and supercritical drying were found to result in amorphous aerogels with relatively high degree of uniformity, of both supports and active phases. Corresponding xerogels were found to be similar to aerogels in terms of composition and structure, but characterized by lower specific surface areas. Catalytic activity of Co/Mo-Al2O3/SiO2 aerogel catalysts in HDS of DBT and 4,6-DMDBT has shown no major improvement in comparison to conventional Co/Mo catalyst. On the other hand, Re/Pd-TiO2/SiO2 aerogels, obtained with the addition of mesitylene or without it, achieved 70 % and 64 % higher conversion of 4,6-DMDBT than conventional Co/Mo catalyst, respectively. Increased catalytic activity can be attributed to well dispersed Re and Pd active phases across the catalyst structure, good incorporation of Ti within silica matrix, increased mesopore volumes and high specific surface areas.",
journal = "Catalysis Today",
title = "Aerogel Re/Pd-TiO2/SiO2 and Co/Mo-Al2O3/SiO2 catalysts for hydrodesulphurisation of dibenzothiophene and 4,6-dimethyldibenzothiophene",
pages = "23-10",
volume = "378",
doi = "10.1016/j.cattod.2020.11.022"
}

Prokić-Vidojević, D., Glišić, S., Krstić, J. B.,& Orlović, A.. (2021). Aerogel Re/Pd-TiO2/SiO2 and Co/Mo-Al2O3/SiO2 catalysts for hydrodesulphurisation of dibenzothiophene and 4,6-dimethyldibenzothiophene. in Catalysis Today, 378, 10-23.
https://doi.org/10.1016/j.cattod.2020.11.022

Prokić-Vidojević D, Glišić S, Krstić JB, Orlović A. Aerogel Re/Pd-TiO2/SiO2 and Co/Mo-Al2O3/SiO2 catalysts for hydrodesulphurisation of dibenzothiophene and 4,6-dimethyldibenzothiophene. in Catalysis Today. 2021;378:10-23.
doi:10.1016/j.cattod.2020.11.022 .

Prokić-Vidojević, Dragana, Glišić, Sandra, Krstić, Jugoslav B., Orlović, Aleksandar, "Aerogel Re/Pd-TiO2/SiO2 and Co/Mo-Al2O3/SiO2 catalysts for hydrodesulphurisation of dibenzothiophene and 4,6-dimethyldibenzothiophene" in Catalysis Today, 378 (2021):10-23,
https://doi.org/10.1016/j.cattod.2020.11.022 . .

TY  - JOUR
AU  - Vasović, Valentina
AU  - Lukić, Jelena
AU  - Mihajlović, Draginja
AU  - Pejović, Branko
AU  - Radaković, Zoran
AU  - Radoman, Uros
AU  - Orlović, Aleksandar
PY  - 2019
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/4110
AB  - The paper presents the results of a comparative study on accelerated aging of specially designed experimental transformers and their corresponding laboratory models. The experimental transformers are 300 kVA, with insulation in line with medium size and large mineral oil immersed power transformers, having different initial water contents in the standard Kraft paper insulation of ca. 1 and 4 %. These transformers were subjected to the rated current and voltage conditions, operating in the irregular parallel operation, whereby the temperature of windings were measured with fiber optics sensors and kept at 105 C for 460 days. Each transformer was equipped with a removable tank which allowed access to the outer surface of the HV windings. Laboratory experiments were simulating experimental transformers and were performed in Erlenmeyer flasks, containing oil, paper materials, copper and iron in the same proportions as in the active part of the experimental transformers. The parameters that were monitored during aging were the following: degree of polymerization of paper, hot-spot temperature of transformers, water content in paper, and water and furans content in the oil. Estimations of water content in solid insulation of experimental transformers using frequency domain spectroscopy and the Perrier-Lukic moisture equilibrium chart were performed. The experimental results show that shortening of the insulation life, defined by the value of degree of polymerization, increased 2.5 times with increasing moisture content in the cellulose from ca. 1 to 4 %. For both experimental transformers and laboratory models, the relationships between the paper degree of polymerization and the furans content for dry and wet insulation was developed and is presented in the paper.
PB  - IEEE-Inst Electrical Electronics Engineers Inc, Piscataway
T2  - IEEE Transactions on Dielectrics and Electrical Insulation
T1  - Aging of transformer insulation - experimental transformers and laboratory models with different moisture contents: Part I - DP and furans aging profiles
EP  - 1846
IS  - 6
SP  - 1840
VL  - 26
DO  - 10.1109/TDEI.2019.008183
ER  - 

@article{
author = "Vasović, Valentina and Lukić, Jelena and Mihajlović, Draginja and Pejović, Branko and Radaković, Zoran and Radoman, Uros and Orlović, Aleksandar",
year = "2019",
abstract = "The paper presents the results of a comparative study on accelerated aging of specially designed experimental transformers and their corresponding laboratory models. The experimental transformers are 300 kVA, with insulation in line with medium size and large mineral oil immersed power transformers, having different initial water contents in the standard Kraft paper insulation of ca. 1 and 4 %. These transformers were subjected to the rated current and voltage conditions, operating in the irregular parallel operation, whereby the temperature of windings were measured with fiber optics sensors and kept at 105 C for 460 days. Each transformer was equipped with a removable tank which allowed access to the outer surface of the HV windings. Laboratory experiments were simulating experimental transformers and were performed in Erlenmeyer flasks, containing oil, paper materials, copper and iron in the same proportions as in the active part of the experimental transformers. The parameters that were monitored during aging were the following: degree of polymerization of paper, hot-spot temperature of transformers, water content in paper, and water and furans content in the oil. Estimations of water content in solid insulation of experimental transformers using frequency domain spectroscopy and the Perrier-Lukic moisture equilibrium chart were performed. The experimental results show that shortening of the insulation life, defined by the value of degree of polymerization, increased 2.5 times with increasing moisture content in the cellulose from ca. 1 to 4 %. For both experimental transformers and laboratory models, the relationships between the paper degree of polymerization and the furans content for dry and wet insulation was developed and is presented in the paper.",
publisher = "IEEE-Inst Electrical Electronics Engineers Inc, Piscataway",
journal = "IEEE Transactions on Dielectrics and Electrical Insulation",
title = "Aging of transformer insulation - experimental transformers and laboratory models with different moisture contents: Part I - DP and furans aging profiles",
pages = "1846-1840",
number = "6",
volume = "26",
doi = "10.1109/TDEI.2019.008183"
}

Vasović, V., Lukić, J., Mihajlović, D., Pejović, B., Radaković, Z., Radoman, U.,& Orlović, A.. (2019). Aging of transformer insulation - experimental transformers and laboratory models with different moisture contents: Part I - DP and furans aging profiles. in IEEE Transactions on Dielectrics and Electrical Insulation
IEEE-Inst Electrical Electronics Engineers Inc, Piscataway., 26(6), 1840-1846.
https://doi.org/10.1109/TDEI.2019.008183

Vasović V, Lukić J, Mihajlović D, Pejović B, Radaković Z, Radoman U, Orlović A. Aging of transformer insulation - experimental transformers and laboratory models with different moisture contents: Part I - DP and furans aging profiles. in IEEE Transactions on Dielectrics and Electrical Insulation. 2019;26(6):1840-1846.
doi:10.1109/TDEI.2019.008183 .

Vasović, Valentina, Lukić, Jelena, Mihajlović, Draginja, Pejović, Branko, Radaković, Zoran, Radoman, Uros, Orlović, Aleksandar, "Aging of transformer insulation - experimental transformers and laboratory models with different moisture contents: Part I - DP and furans aging profiles" in IEEE Transactions on Dielectrics and Electrical Insulation, 26, no. 6 (2019):1840-1846,
https://doi.org/10.1109/TDEI.2019.008183 . .

TY  - JOUR
AU  - Prokić-Vidojević, Dragana
AU  - Glišić, Sandra
AU  - Orlović, Aleksandar
PY  - 2017
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/3533
AB  - Textural characteristics of catalysts and catalysts supports are of a prime importance when it comes to their application in processing of high molecular weight compounds. Drying procedure is a key factor in preservation of wet gel properties. Hexagonal mesoporous silicas (HMS) doped with Ti-ions is finding a promising usage as heterogeneous catalysts support. In this paper, the effect of supercritical drying with excess solvent on the textural characteristics of Ti- HMS is addressed. HMS with Ti ions (Si/Ti atomic ratio of 40) is prepared using the sol-gel method. Dodecylamine is used as the structure directing surfactant (S) and TEOS and Titanium butoxide as the inorganic precursors (I). Specific surface area, mesoporosity and pore volume of the support dried by thermal evaporation of solvent in air and dried in excess of supercritical ethanol are compared. The results indicate that improved specific surface area and almost four times bigger value for mesopore volume are obtained using supercritical drying procedure.
AB  - Teksturalne karakteristike katalizatora i nosača katalizatora su od izuzetne važnosti kad je u pitanju korišćenje katalizatora u procesima u kojima učestvuju jedinjenja velike molekulske mase. Način sušenja vlažnog gela igra značajnu ulogu u očuvanju njegovih karakteristika. Heksagonalna mezoporozna silika (HMS) sa jonima titanijuma sve se vise koristi kao nosač heterogenih katalizatora. U ovom radu je predstavljen uticaj sušenja u višku rastvarača u natkritičnim uslovima na teksturalne karakteristike Ti-HMS. HMS sa jonima Ti (Si/Ti atomskog odnosa 40) sintetisana je primenom sol-gel metode. Kao templejt za formiranje struktura korišćen je dodecilamin (S°), a kao neorganski prekursori (I°) tetraetilortosilikat (TEOS) i titanijum butoksid. Upoređene su specifična površina, mezoporoznost i zapremina pora nosača sušenog termičkom evaporacijom rastvarača u vazduhu i nosača sušenog u višku natkritičnog etanola. Rezultati pokazuju da je korišćenjem natkritičnog sušenja poboljšana vrednost specifične površine nosača i dobijena četiri puta veća vrednost zapremine mezopora.
PB  - Military Technical Institute, Belgrade
T2  - Scientific Technical Review
T1  - Impact of supercritical drying with excess solvent on textural properties of Ti-HMS catalyst support
T1  - Vozdejstvie suški v izbytke sverhkritičeskogo rastvoritelja na teksturnye harakteristiki nositelja katalizatora Ti-HMS / (francuski) Influence du séchage dans l'excès du solvant supercritique sur les caractéristiques texturales du support de catalyseur Ti-HMS)
T1  - Uticaj sušenja u višku natkritičnog rastvarača na teksturalne karakteristike nosača katalizatora Ti-HMS
EP  - 28
IS  - 1
SP  - 21
VL  - 67
DO  - 10.5937/STR1701021P
ER  - 

@article{
author = "Prokić-Vidojević, Dragana and Glišić, Sandra and Orlović, Aleksandar",
year = "2017",
abstract = "Textural characteristics of catalysts and catalysts supports are of a prime importance when it comes to their application in processing of high molecular weight compounds. Drying procedure is a key factor in preservation of wet gel properties. Hexagonal mesoporous silicas (HMS) doped with Ti-ions is finding a promising usage as heterogeneous catalysts support. In this paper, the effect of supercritical drying with excess solvent on the textural characteristics of Ti- HMS is addressed. HMS with Ti ions (Si/Ti atomic ratio of 40) is prepared using the sol-gel method. Dodecylamine is used as the structure directing surfactant (S) and TEOS and Titanium butoxide as the inorganic precursors (I). Specific surface area, mesoporosity and pore volume of the support dried by thermal evaporation of solvent in air and dried in excess of supercritical ethanol are compared. The results indicate that improved specific surface area and almost four times bigger value for mesopore volume are obtained using supercritical drying procedure., Teksturalne karakteristike katalizatora i nosača katalizatora su od izuzetne važnosti kad je u pitanju korišćenje katalizatora u procesima u kojima učestvuju jedinjenja velike molekulske mase. Način sušenja vlažnog gela igra značajnu ulogu u očuvanju njegovih karakteristika. Heksagonalna mezoporozna silika (HMS) sa jonima titanijuma sve se vise koristi kao nosač heterogenih katalizatora. U ovom radu je predstavljen uticaj sušenja u višku rastvarača u natkritičnim uslovima na teksturalne karakteristike Ti-HMS. HMS sa jonima Ti (Si/Ti atomskog odnosa 40) sintetisana je primenom sol-gel metode. Kao templejt za formiranje struktura korišćen je dodecilamin (S°), a kao neorganski prekursori (I°) tetraetilortosilikat (TEOS) i titanijum butoksid. Upoređene su specifična površina, mezoporoznost i zapremina pora nosača sušenog termičkom evaporacijom rastvarača u vazduhu i nosača sušenog u višku natkritičnog etanola. Rezultati pokazuju da je korišćenjem natkritičnog sušenja poboljšana vrednost specifične površine nosača i dobijena četiri puta veća vrednost zapremine mezopora.",
publisher = "Military Technical Institute, Belgrade",
journal = "Scientific Technical Review",
title = "Impact of supercritical drying with excess solvent on textural properties of Ti-HMS catalyst support, Vozdejstvie suški v izbytke sverhkritičeskogo rastvoritelja na teksturnye harakteristiki nositelja katalizatora Ti-HMS / (francuski) Influence du séchage dans l'excès du solvant supercritique sur les caractéristiques texturales du support de catalyseur Ti-HMS), Uticaj sušenja u višku natkritičnog rastvarača na teksturalne karakteristike nosača katalizatora Ti-HMS",
pages = "28-21",
number = "1",
volume = "67",
doi = "10.5937/STR1701021P"
}

Prokić-Vidojević, D., Glišić, S.,& Orlović, A.. (2017). Impact of supercritical drying with excess solvent on textural properties of Ti-HMS catalyst support. in Scientific Technical Review
Military Technical Institute, Belgrade., 67(1), 21-28.
https://doi.org/10.5937/STR1701021P

Prokić-Vidojević D, Glišić S, Orlović A. Impact of supercritical drying with excess solvent on textural properties of Ti-HMS catalyst support. in Scientific Technical Review. 2017;67(1):21-28.
doi:10.5937/STR1701021P .

Prokić-Vidojević, Dragana, Glišić, Sandra, Orlović, Aleksandar, "Impact of supercritical drying with excess solvent on textural properties of Ti-HMS catalyst support" in Scientific Technical Review, 67, no. 1 (2017):21-28,
https://doi.org/10.5937/STR1701021P . .

TY  - JOUR
AU  - Ćosović, Aleksandar
AU  - Žák, Tomáš
AU  - Glišić, Sandra
AU  - Sokić, Miroslav
AU  - Lazarević, Slavica
AU  - Ćosović, Vladan
AU  - Orlović, Aleksandar
PY  - 2016
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/3262
AB  - Nano-crystalline nickel ferrite has a broad range of applications due to its favourable magnetic properties. Those characteristics can be significantly influenced by the synthesis pathway including methods conducted in the presence of supercritical alcohols. Nano-crystalline NiFe2O4 powders were obtained in the reaction under subcritical and supercritical conditions of ethanol. Both high pressure synthesis routes resulted in powders with smaller primary particles and higher mesoporosity than co-precipitation method. Upon the annealing treatment the average crystallite size increased while material structure remained uniform, resulting in significantly enhanced magnetic properties, such as coercivity and remanence. It was found that synthesis under supercritical conditions provides higher conversion but also material with larger average crystallite size upon annealing. The time and temperature of annealing stage significantly influenced the morphology and magnetic properties of the obtained powders.
PB  - Elsevier Science Bv, Amsterdam
T2  - Journal of Supercritical Fluids
T1  - Synthesis of nano-crystalline NiFe2O4 powders in subcritical and supercritical ethanol
EP  - 105
SP  - 96
VL  - 113
DO  - 10.1016/j.supflu.2016.03.014
ER  - 

@article{
author = "Ćosović, Aleksandar and Žák, Tomáš and Glišić, Sandra and Sokić, Miroslav and Lazarević, Slavica and Ćosović, Vladan and Orlović, Aleksandar",
year = "2016",
abstract = "Nano-crystalline nickel ferrite has a broad range of applications due to its favourable magnetic properties. Those characteristics can be significantly influenced by the synthesis pathway including methods conducted in the presence of supercritical alcohols. Nano-crystalline NiFe2O4 powders were obtained in the reaction under subcritical and supercritical conditions of ethanol. Both high pressure synthesis routes resulted in powders with smaller primary particles and higher mesoporosity than co-precipitation method. Upon the annealing treatment the average crystallite size increased while material structure remained uniform, resulting in significantly enhanced magnetic properties, such as coercivity and remanence. It was found that synthesis under supercritical conditions provides higher conversion but also material with larger average crystallite size upon annealing. The time and temperature of annealing stage significantly influenced the morphology and magnetic properties of the obtained powders.",
publisher = "Elsevier Science Bv, Amsterdam",
journal = "Journal of Supercritical Fluids",
title = "Synthesis of nano-crystalline NiFe2O4 powders in subcritical and supercritical ethanol",
pages = "105-96",
volume = "113",
doi = "10.1016/j.supflu.2016.03.014"
}

Ćosović, A., Žák, T., Glišić, S., Sokić, M., Lazarević, S., Ćosović, V.,& Orlović, A.. (2016). Synthesis of nano-crystalline NiFe2O4 powders in subcritical and supercritical ethanol. in Journal of Supercritical Fluids
Elsevier Science Bv, Amsterdam., 113, 96-105.
https://doi.org/10.1016/j.supflu.2016.03.014

Ćosović A, Žák T, Glišić S, Sokić M, Lazarević S, Ćosović V, Orlović A. Synthesis of nano-crystalline NiFe2O4 powders in subcritical and supercritical ethanol. in Journal of Supercritical Fluids. 2016;113:96-105.
doi:10.1016/j.supflu.2016.03.014 .

Ćosović, Aleksandar, Žák, Tomáš, Glišić, Sandra, Sokić, Miroslav, Lazarević, Slavica, Ćosović, Vladan, Orlović, Aleksandar, "Synthesis of nano-crystalline NiFe2O4 powders in subcritical and supercritical ethanol" in Journal of Supercritical Fluids, 113 (2016):96-105,
https://doi.org/10.1016/j.supflu.2016.03.014 . .

TY  - JOUR
AU  - Glišić, Sandra
AU  - Pajnik, Jelena
AU  - Orlović, Aleksandar
PY  - 2016
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/3448
AB  - Like ester type biodiesel fuel, green diesel is a next generation transportation fuel emerging due to the need for a renewable replacement of internal combustion engine fuel, which is also fully compatible with existing automotive powertrain systems. Besides other limitations, the main obstacle for wider application of such renewable fuels is their relatively high production cost, depending mainly on the raw material cost and the application of more efficient processing technology. Green diesel and ester type biodiesel can be produced from waste vegetable oil by catalytic hydrogenation, homogeneous alkali catalysed transesterification and supercritical non-catalytic transesterification. Techno-economic analysis and the sensitivity analysis reveal that economics of these production technologies strongly depend on the process unit capacity and the cost of feedstock. Green diesel production by catalytic hydroprocessing located in a petroleum refinery appears to be the most cost effective option for unit capacity close to and above 200,000 tonnes/year. Conventional ester biodiesel process and non-catalytic ester biodiesel process under supercritical conditions are less profitable at specified capacity. Unit capacities of the investigated processes which are below 100,000 tonnes/year are likely to result in negative net present values after 10 years of project lifetime.
PB  - Elsevier Sci Ltd, Oxford
T2  - Applied Energy
T1  - Process and techno-economic analysis of green diesel production from waste vegetable oil and the comparison with ester type biodiesel production
EP  - 185
SP  - 176
VL  - 170
DO  - 10.1016/j.apenergy.2016.02.102
ER  - 

@article{
author = "Glišić, Sandra and Pajnik, Jelena and Orlović, Aleksandar",
year = "2016",
abstract = "Like ester type biodiesel fuel, green diesel is a next generation transportation fuel emerging due to the need for a renewable replacement of internal combustion engine fuel, which is also fully compatible with existing automotive powertrain systems. Besides other limitations, the main obstacle for wider application of such renewable fuels is their relatively high production cost, depending mainly on the raw material cost and the application of more efficient processing technology. Green diesel and ester type biodiesel can be produced from waste vegetable oil by catalytic hydrogenation, homogeneous alkali catalysed transesterification and supercritical non-catalytic transesterification. Techno-economic analysis and the sensitivity analysis reveal that economics of these production technologies strongly depend on the process unit capacity and the cost of feedstock. Green diesel production by catalytic hydroprocessing located in a petroleum refinery appears to be the most cost effective option for unit capacity close to and above 200,000 tonnes/year. Conventional ester biodiesel process and non-catalytic ester biodiesel process under supercritical conditions are less profitable at specified capacity. Unit capacities of the investigated processes which are below 100,000 tonnes/year are likely to result in negative net present values after 10 years of project lifetime.",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "Applied Energy",
title = "Process and techno-economic analysis of green diesel production from waste vegetable oil and the comparison with ester type biodiesel production",
pages = "185-176",
volume = "170",
doi = "10.1016/j.apenergy.2016.02.102"
}

Glišić, S., Pajnik, J.,& Orlović, A.. (2016). Process and techno-economic analysis of green diesel production from waste vegetable oil and the comparison with ester type biodiesel production. in Applied Energy
Elsevier Sci Ltd, Oxford., 170, 176-185.
https://doi.org/10.1016/j.apenergy.2016.02.102

Glišić S, Pajnik J, Orlović A. Process and techno-economic analysis of green diesel production from waste vegetable oil and the comparison with ester type biodiesel production. in Applied Energy. 2016;170:176-185.
doi:10.1016/j.apenergy.2016.02.102 .

Glišić, Sandra, Pajnik, Jelena, Orlović, Aleksandar, "Process and techno-economic analysis of green diesel production from waste vegetable oil and the comparison with ester type biodiesel production" in Applied Energy, 170 (2016):176-185,
https://doi.org/10.1016/j.apenergy.2016.02.102 . .

TY  - JOUR
AU  - Mijatović, Ivana M.
AU  - Glišić, Sandra
AU  - Orlović, Aleksandar
PY  - 2015
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2905
AB  - Many industrial scale trickle bed reactors (TBR) operate at lower liquid superficial velocities ( lt 0.5 cm/s) at which the catalyst particle are not completely wetted. This phenomenon of incomplete wetting has therefore received significant attention and numerous studies have addressed the influence of wetting on the overall rate, conversion/selectivity behavior, and heat effects in TBR. The incomplete wetting conditions correspond to stagnant liquid pockets due to lower liquid superficial velocity which could cause significant influence on reactor performances. In this paper, several models for wetting efficiency in TBR on industrial level are examined and influence on reaction rate and reactor performance is discussed.
AB  - Mnogi reaktori sa pakovanim slojem katalizatora (TBR) u industrijskim procesima za hidroobradu rade pri malim površinskim brzinama tečne faze ( lt 0,5 cm/s) pri čemu su čestice katalizatora samo delimično ovlažene. Ovaj fenomen delimične ovlaženosti katalizatora detaljno je ispitivan, kao i uticaj stepena ovlaženosti na brzine reakcija koje se odvijaju u procesu, na konverzije, selektivnost, i na porast temperature u reaktoru. U ovom radu upoređeni su rezultati nekoliko različitih modela za izračunavanje ovlaženosti u industrijskom reaktoru sa pakovanim slojem katalizatora, kao i uticaj ovlaženosti na brzine hemijskih reakcija i na rad industrijskog rektora.
PB  - Savez inženjera i tehničara Srbije, Beograd
T2  - Tehnika
T1  - Analysis of catalyst wetting efficiency influence on performances of industrial TBR for hydro desulfurization and hydro de aromatization reactions
T1  - Analiza uticaja ovlaženosti katalizatora u industrijskom TBR reaktoru na reakcije hidrodesulfurizacije i hidrodearomatizacije
EP  - 584
IS  - 4
SP  - 581
VL  - 70
DO  - 10.5937/tehnika1504581M
ER  - 

@article{
author = "Mijatović, Ivana M. and Glišić, Sandra and Orlović, Aleksandar",
year = "2015",
abstract = "Many industrial scale trickle bed reactors (TBR) operate at lower liquid superficial velocities ( lt 0.5 cm/s) at which the catalyst particle are not completely wetted. This phenomenon of incomplete wetting has therefore received significant attention and numerous studies have addressed the influence of wetting on the overall rate, conversion/selectivity behavior, and heat effects in TBR. The incomplete wetting conditions correspond to stagnant liquid pockets due to lower liquid superficial velocity which could cause significant influence on reactor performances. In this paper, several models for wetting efficiency in TBR on industrial level are examined and influence on reaction rate and reactor performance is discussed., Mnogi reaktori sa pakovanim slojem katalizatora (TBR) u industrijskim procesima za hidroobradu rade pri malim površinskim brzinama tečne faze ( lt 0,5 cm/s) pri čemu su čestice katalizatora samo delimično ovlažene. Ovaj fenomen delimične ovlaženosti katalizatora detaljno je ispitivan, kao i uticaj stepena ovlaženosti na brzine reakcija koje se odvijaju u procesu, na konverzije, selektivnost, i na porast temperature u reaktoru. U ovom radu upoređeni su rezultati nekoliko različitih modela za izračunavanje ovlaženosti u industrijskom reaktoru sa pakovanim slojem katalizatora, kao i uticaj ovlaženosti na brzine hemijskih reakcija i na rad industrijskog rektora.",
publisher = "Savez inženjera i tehničara Srbije, Beograd",
journal = "Tehnika",
title = "Analysis of catalyst wetting efficiency influence on performances of industrial TBR for hydro desulfurization and hydro de aromatization reactions, Analiza uticaja ovlaženosti katalizatora u industrijskom TBR reaktoru na reakcije hidrodesulfurizacije i hidrodearomatizacije",
pages = "584-581",
number = "4",
volume = "70",
doi = "10.5937/tehnika1504581M"
}

Mijatović, I. M., Glišić, S.,& Orlović, A.. (2015). Analysis of catalyst wetting efficiency influence on performances of industrial TBR for hydro desulfurization and hydro de aromatization reactions. in Tehnika
Savez inženjera i tehničara Srbije, Beograd., 70(4), 581-584.
https://doi.org/10.5937/tehnika1504581M

Mijatović IM, Glišić S, Orlović A. Analysis of catalyst wetting efficiency influence on performances of industrial TBR for hydro desulfurization and hydro de aromatization reactions. in Tehnika. 2015;70(4):581-584.
doi:10.5937/tehnika1504581M .

Mijatović, Ivana M., Glišić, Sandra, Orlović, Aleksandar, "Analysis of catalyst wetting efficiency influence on performances of industrial TBR for hydro desulfurization and hydro de aromatization reactions" in Tehnika, 70, no. 4 (2015):581-584,
https://doi.org/10.5937/tehnika1504581M . .

TY  - JOUR
AU  - Almagrbi, Abdualnaser Muftah
AU  - Hatami, Tahmasb
AU  - Glišić, Sandra
AU  - Orlović, Aleksandar
PY  - 2014
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2635
AB  - This paper represents a methodology for kinetic parameter estimation based on standard optimization methods. The parameter estimation procedure is applied to the example of modelling of non-catalytic transesterification reaction, based on laboratory experiments performed under elevated pressure. The kinetic model employed in this study consists of three consecutive and parallel reversible reactions of the second order, with six kinetic constants. The influence of the mass transfer effects was considered as well. The best results were obtained by Genetic Algorithm method. The application of this method resulted in kinetic parameters with improved accuracy in predicting concentrations of important reaction intermediates, i.e., diglycerides and monoglycerides. Activation energies of kinetic parameters obtained by the Genetic Algorithm method are in line with theoretical values determined by molecular orbital calculations.
AB  - U ovom radu je predstavljena metodologija i rezultati određivanja kinetičkih parametara za složenu reakciju transesterifikacije korišćenjem standardnih optimizacionih metoda. Određivanje kinetičkih parametara različitim optimizacionim metodama izvedeno je za nekatalizovane reakcije transesterifikacije suncokretovog ulja sa metanolom. Reakcija je ispitivana eksperimentima u šaržnom reaktoru pod uslovima povišenog pritiska i temperature. Ova reakcija predstavlja jedan složen reakcioni sistem, kako sa aspekta kinetike hemijskih reakcija tako i sa aspekta ravnoteže faza i prenosa mase. Sistem je višekomponentni pri čemu se ukupni sastav znatno menja tokom reakcije, a u zavisnosti od temperature i pritiska, reakcioni sistem menja i broj i sastav faza u ravnoteži. Primenjeni kinetički model čini sistem od tri povratne uporedno-uzastopne reakcije drugogog reda. Pod uslovima pritiska i temperature ispitanim u ovom radu (150 °C i 1,1 MPa; 210 °C i 4,5 MPa), ovaj reakcioni sistem u početnoj fazi čine dve tečne faze u termodinamičkoj ravnoteži. Zbog ove činjenice u početnoj fazi reakcije u obzir je uzet i uticaj prenosa mase na kinetičke parametre. Tokom reakcije koju karakteriše nastajanje međuproizvoda, mono i diglicerida, dolazi do stvaranja mikroemulzije što je potvrđeno prethodnim istraživanjima. Stoga se ovakav sistem u naknadnoj fazi može smatrati uniformnim po celoj zapremini. Optimizacione metode primenjene u ovom radu zasnivaju se na primeni Levenberg-Marquardt logaritma, S/mulated Annel/ng i genetskog algoritma. Najbolji rezultati su dobijeni primenom genetskog algoritma, odnosno kinetički parametri dobijeni tim proračunom pokazuju najmanje odstupanje predviđanja koncentracija svih reaktanata i proizvoda u odnosu na eksperimentalne podatke. Primenom optimizacionih metoda na ovako složen sistem moguće je dobiti bolje predviđanje koncentracija intermedijera u odnosu na druge metode koje se mogu naći u literaturi. Takođe, postoje razlike u kvalitetu rešenja dobijenim različitim optimizacionim metodama. Kinetički parametri dobijeni primenom Levenberg-Marquardt algoritma dobro numerički opisuju realni sistem ali vrednosti kinetičkih parametara ne odgovaraju teoretskim vrednostima koje se očekuju na osnovu mehanizma reakcije. Sa druge strane, vrednosti energija aktivacije ove složene reakcije koje su dobijene primenom genetskog algoritma, u veoma su dobrom slaganju sa vrednostima energija aktivacije koje su dobijene proračunom molekulskih orbitala.
PB  - Association of Chemical Engineers of Serbia
T2  - Hemijska industrija
T1  - Determination of kinetic parameters for complex transesterification reaction by standard optimisation methods
T1  - Određivanje kinetičkih parametara složene reakcije transesterifikacije primenom standardnih optimizacionih metoda
EP  - 159
IS  - 2
SP  - 149
VL  - 68
DO  - 10.2298/HEMIND130118037A
ER  - 

@article{
author = "Almagrbi, Abdualnaser Muftah and Hatami, Tahmasb and Glišić, Sandra and Orlović, Aleksandar",
year = "2014",
abstract = "This paper represents a methodology for kinetic parameter estimation based on standard optimization methods. The parameter estimation procedure is applied to the example of modelling of non-catalytic transesterification reaction, based on laboratory experiments performed under elevated pressure. The kinetic model employed in this study consists of three consecutive and parallel reversible reactions of the second order, with six kinetic constants. The influence of the mass transfer effects was considered as well. The best results were obtained by Genetic Algorithm method. The application of this method resulted in kinetic parameters with improved accuracy in predicting concentrations of important reaction intermediates, i.e., diglycerides and monoglycerides. Activation energies of kinetic parameters obtained by the Genetic Algorithm method are in line with theoretical values determined by molecular orbital calculations., U ovom radu je predstavljena metodologija i rezultati određivanja kinetičkih parametara za složenu reakciju transesterifikacije korišćenjem standardnih optimizacionih metoda. Određivanje kinetičkih parametara različitim optimizacionim metodama izvedeno je za nekatalizovane reakcije transesterifikacije suncokretovog ulja sa metanolom. Reakcija je ispitivana eksperimentima u šaržnom reaktoru pod uslovima povišenog pritiska i temperature. Ova reakcija predstavlja jedan složen reakcioni sistem, kako sa aspekta kinetike hemijskih reakcija tako i sa aspekta ravnoteže faza i prenosa mase. Sistem je višekomponentni pri čemu se ukupni sastav znatno menja tokom reakcije, a u zavisnosti od temperature i pritiska, reakcioni sistem menja i broj i sastav faza u ravnoteži. Primenjeni kinetički model čini sistem od tri povratne uporedno-uzastopne reakcije drugogog reda. Pod uslovima pritiska i temperature ispitanim u ovom radu (150 °C i 1,1 MPa; 210 °C i 4,5 MPa), ovaj reakcioni sistem u početnoj fazi čine dve tečne faze u termodinamičkoj ravnoteži. Zbog ove činjenice u početnoj fazi reakcije u obzir je uzet i uticaj prenosa mase na kinetičke parametre. Tokom reakcije koju karakteriše nastajanje međuproizvoda, mono i diglicerida, dolazi do stvaranja mikroemulzije što je potvrđeno prethodnim istraživanjima. Stoga se ovakav sistem u naknadnoj fazi može smatrati uniformnim po celoj zapremini. Optimizacione metode primenjene u ovom radu zasnivaju se na primeni Levenberg-Marquardt logaritma, S/mulated Annel/ng i genetskog algoritma. Najbolji rezultati su dobijeni primenom genetskog algoritma, odnosno kinetički parametri dobijeni tim proračunom pokazuju najmanje odstupanje predviđanja koncentracija svih reaktanata i proizvoda u odnosu na eksperimentalne podatke. Primenom optimizacionih metoda na ovako složen sistem moguće je dobiti bolje predviđanje koncentracija intermedijera u odnosu na druge metode koje se mogu naći u literaturi. Takođe, postoje razlike u kvalitetu rešenja dobijenim različitim optimizacionim metodama. Kinetički parametri dobijeni primenom Levenberg-Marquardt algoritma dobro numerički opisuju realni sistem ali vrednosti kinetičkih parametara ne odgovaraju teoretskim vrednostima koje se očekuju na osnovu mehanizma reakcije. Sa druge strane, vrednosti energija aktivacije ove složene reakcije koje su dobijene primenom genetskog algoritma, u veoma su dobrom slaganju sa vrednostima energija aktivacije koje su dobijene proračunom molekulskih orbitala.",
publisher = "Association of Chemical Engineers of Serbia",
journal = "Hemijska industrija",
title = "Determination of kinetic parameters for complex transesterification reaction by standard optimisation methods, Određivanje kinetičkih parametara složene reakcije transesterifikacije primenom standardnih optimizacionih metoda",
pages = "159-149",
number = "2",
volume = "68",
doi = "10.2298/HEMIND130118037A"
}

Almagrbi, A. M., Hatami, T., Glišić, S.,& Orlović, A.. (2014). Determination of kinetic parameters for complex transesterification reaction by standard optimisation methods. in Hemijska industrija
Association of Chemical Engineers of Serbia., 68(2), 149-159.
https://doi.org/10.2298/HEMIND130118037A

Almagrbi AM, Hatami T, Glišić S, Orlović A. Determination of kinetic parameters for complex transesterification reaction by standard optimisation methods. in Hemijska industrija. 2014;68(2):149-159.
doi:10.2298/HEMIND130118037A .

Almagrbi, Abdualnaser Muftah, Hatami, Tahmasb, Glišić, Sandra, Orlović, Aleksandar, "Determination of kinetic parameters for complex transesterification reaction by standard optimisation methods" in Hemijska industrija, 68, no. 2 (2014):149-159,
https://doi.org/10.2298/HEMIND130118037A . .

TY  - JOUR
AU  - Mijatović, Ivana M.
AU  - Glišić, Sandra
AU  - Orlović, Aleksandar
PY  - 2014
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2722
AB  - Reducing the sulfur content of diesel fuels may require adjusted operation of low-pressure hydrotreater units. A mathematical model for co-hydrotreating of straight run gas oil blended with fluid catalytic cracking naphtha and light cycle oil was developed using an axial distribution of phase equilibrium and effective wetting in the catalytic reactor. The model assumes that hydrodesulfurization (HDS) and hydrodearomatization reactions occur on the catalyst surface which is in contact with the vapor or liquid phase. Kinetic equations of HougenWatson type were used to describe HDS reactions for different classes of sulfur compounds. Model results were validated using the industrial test run data, and very good predictions of overall sulfur conversion and reactor temperature were obtained. Simulations of reactor operation at different pressures, temperatures, and H-2 purities confirm that reaction pressures of around 100 bar and high-purity hydrogen streams are required for almost complete removal of sulfur compounds.
PB  - Amer Chemical Soc, Washington
T2  - Industrial & Engineering Chemistry Research
T1  - Modeling a Catalytic Reactor for Hydrotreating of Straight-Run Gas Oil Blended with Fluid Catalytic Cracking Naphtha and Light Cycle Oil: Influence of Vapor-Liquid Equilibrium
EP  - 19116
IS  - 49
SP  - 19104
VL  - 53
DO  - 10.1021/ie503188p
ER  - 

@article{
author = "Mijatović, Ivana M. and Glišić, Sandra and Orlović, Aleksandar",
year = "2014",
abstract = "Reducing the sulfur content of diesel fuels may require adjusted operation of low-pressure hydrotreater units. A mathematical model for co-hydrotreating of straight run gas oil blended with fluid catalytic cracking naphtha and light cycle oil was developed using an axial distribution of phase equilibrium and effective wetting in the catalytic reactor. The model assumes that hydrodesulfurization (HDS) and hydrodearomatization reactions occur on the catalyst surface which is in contact with the vapor or liquid phase. Kinetic equations of HougenWatson type were used to describe HDS reactions for different classes of sulfur compounds. Model results were validated using the industrial test run data, and very good predictions of overall sulfur conversion and reactor temperature were obtained. Simulations of reactor operation at different pressures, temperatures, and H-2 purities confirm that reaction pressures of around 100 bar and high-purity hydrogen streams are required for almost complete removal of sulfur compounds.",
publisher = "Amer Chemical Soc, Washington",
journal = "Industrial & Engineering Chemistry Research",
title = "Modeling a Catalytic Reactor for Hydrotreating of Straight-Run Gas Oil Blended with Fluid Catalytic Cracking Naphtha and Light Cycle Oil: Influence of Vapor-Liquid Equilibrium",
pages = "19116-19104",
number = "49",
volume = "53",
doi = "10.1021/ie503188p"
}

Mijatović, I. M., Glišić, S.,& Orlović, A.. (2014). Modeling a Catalytic Reactor for Hydrotreating of Straight-Run Gas Oil Blended with Fluid Catalytic Cracking Naphtha and Light Cycle Oil: Influence of Vapor-Liquid Equilibrium. in Industrial & Engineering Chemistry Research
Amer Chemical Soc, Washington., 53(49), 19104-19116.
https://doi.org/10.1021/ie503188p

Mijatović IM, Glišić S, Orlović A. Modeling a Catalytic Reactor for Hydrotreating of Straight-Run Gas Oil Blended with Fluid Catalytic Cracking Naphtha and Light Cycle Oil: Influence of Vapor-Liquid Equilibrium. in Industrial & Engineering Chemistry Research. 2014;53(49):19104-19116.
doi:10.1021/ie503188p .

Mijatović, Ivana M., Glišić, Sandra, Orlović, Aleksandar, "Modeling a Catalytic Reactor for Hydrotreating of Straight-Run Gas Oil Blended with Fluid Catalytic Cracking Naphtha and Light Cycle Oil: Influence of Vapor-Liquid Equilibrium" in Industrial & Engineering Chemistry Research, 53, no. 49 (2014):19104-19116,
https://doi.org/10.1021/ie503188p . .

TY  - JOUR
AU  - Glišić, Sandra
AU  - Orlović, Aleksandar
PY  - 2014
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2776
AB  - The synthesis of biodiesel under elevated pressure and temperature could be promising technology which could result in sustainable biodiesel production, from renewable and waste streams like waste oil or used frying oil, thereby having no impact on biodiversity and the environment. This paper is comprehensive review of biodiesel synthesis from waste oil under elevated pressure and temperature: the supercritical or subcritical conditions of alcohol, with or without the use of heterogeneous catalyst. The review compromises the thermodynamic data, phase equilibria, phase composition and distribution during reaction, kinetic parameters and kinetic modeling, are presented. This type of data is necessary for process design and optimization. Process economics is analyzed and the impact of different production parameters (feedstock type, process parameters as temperature, pressure and alcohol to oil ratio, and different technology) is summarized and discussed.
PB  - Pergamon-Elsevier Science Ltd, Oxford
T2  - Renewable & Sustainable Energy Reviews
T1  - Review of biodiesel synthesis from waste oil under elevated pressure and temperature: Phase equilibrium, reaction kinetics, process design and techno-economic study
EP  - 725
SP  - 708
VL  - 31
DO  - 10.1016/j.rser.2013.12.003
ER  - 

@article{
author = "Glišić, Sandra and Orlović, Aleksandar",
year = "2014",
abstract = "The synthesis of biodiesel under elevated pressure and temperature could be promising technology which could result in sustainable biodiesel production, from renewable and waste streams like waste oil or used frying oil, thereby having no impact on biodiversity and the environment. This paper is comprehensive review of biodiesel synthesis from waste oil under elevated pressure and temperature: the supercritical or subcritical conditions of alcohol, with or without the use of heterogeneous catalyst. The review compromises the thermodynamic data, phase equilibria, phase composition and distribution during reaction, kinetic parameters and kinetic modeling, are presented. This type of data is necessary for process design and optimization. Process economics is analyzed and the impact of different production parameters (feedstock type, process parameters as temperature, pressure and alcohol to oil ratio, and different technology) is summarized and discussed.",
publisher = "Pergamon-Elsevier Science Ltd, Oxford",
journal = "Renewable & Sustainable Energy Reviews",
title = "Review of biodiesel synthesis from waste oil under elevated pressure and temperature: Phase equilibrium, reaction kinetics, process design and techno-economic study",
pages = "725-708",
volume = "31",
doi = "10.1016/j.rser.2013.12.003"
}

Glišić, S.,& Orlović, A.. (2014). Review of biodiesel synthesis from waste oil under elevated pressure and temperature: Phase equilibrium, reaction kinetics, process design and techno-economic study. in Renewable & Sustainable Energy Reviews
Pergamon-Elsevier Science Ltd, Oxford., 31, 708-725.
https://doi.org/10.1016/j.rser.2013.12.003

Glišić S, Orlović A. Review of biodiesel synthesis from waste oil under elevated pressure and temperature: Phase equilibrium, reaction kinetics, process design and techno-economic study. in Renewable & Sustainable Energy Reviews. 2014;31:708-725.
doi:10.1016/j.rser.2013.12.003 .

Glišić, Sandra, Orlović, Aleksandar, "Review of biodiesel synthesis from waste oil under elevated pressure and temperature: Phase equilibrium, reaction kinetics, process design and techno-economic study" in Renewable & Sustainable Energy Reviews, 31 (2014):708-725,
https://doi.org/10.1016/j.rser.2013.12.003 . .

TY  - CHAP
AU  - Glišić, Sandra
AU  - Orlović, Aleksandar
PY  - 2013
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2271
AB  - St. John's Wort (Hypericum perforatum L.) has been widely used as an anti-inflammatory and healing agent in traditional medicine. Some para-pharmaceutical products, prepared from the extract of St. John's Wort, are frequently used because of their anti-depressive and antiviral properties. Moreover, the extract prepared from St. John's Wort (H. perforatum L.) has been also reported to have an antimicrobial, anti-inflammatory, and healing effect. Thus, extraction of a specific component from St. John's Wort which gives a high yield of total extract and high content of desired pharmacological active compounds is obviously in focus of many research activities today. Despite the evident clinical effects, there is still a controversy regarding the active principle of the extracts. Some authors attribute the antidepressant activity to hypericin and its derivatives, whereas, other studies are in the favor of hyperforin. Hyperforin, as a phloroglucinol derivative is a relatively lipophilic compound which is susceptible to rapid thermal, light-induced and oxidative decomposition. Adhyperforin presents its methyl derivative. The supercritical fluid extraction (SFE) is an outstanding method for the extraction of natural agents and valuable components from plant materials, because heat-sensitive compounds can be extracted without any degradation, and in addition, it is an environmentally acceptable technology. Supercritical carbon dioxide (SCCO2) is the most useful supercritical fluid in the food industry, because it is non-toxic, non-explosive, and available in high (food grade) purity and can be removed from the extracted products without leaving any residue. The main goal of this study was oriented to the investigation of process optimization of the best extraction method applicable to intergradient in food and pharmaceutical industry - supercritical fluid extraction as well as the antimicrobial activity of obtained extracts. The first part of study will represent the literature review of St. John's Wort occurrence in nature, their health effects and medical and pharmaceutical use.
T2  - Phytochemicals: Occurrence in Nature, Health Effects and Antioxidant Properties
T1  - Supercritical extraction of phloroglucinols from St. John's wort (Hypericum Perforatum L.) - Process optimization, mathematical modeling and antimicrobial activity
EP  - 146
SP  - 121
UR  - https://hdl.handle.net/21.15107/rcub_technorep_2271
ER  - 

@inbook{
author = "Glišić, Sandra and Orlović, Aleksandar",
year = "2013",
abstract = "St. John's Wort (Hypericum perforatum L.) has been widely used as an anti-inflammatory and healing agent in traditional medicine. Some para-pharmaceutical products, prepared from the extract of St. John's Wort, are frequently used because of their anti-depressive and antiviral properties. Moreover, the extract prepared from St. John's Wort (H. perforatum L.) has been also reported to have an antimicrobial, anti-inflammatory, and healing effect. Thus, extraction of a specific component from St. John's Wort which gives a high yield of total extract and high content of desired pharmacological active compounds is obviously in focus of many research activities today. Despite the evident clinical effects, there is still a controversy regarding the active principle of the extracts. Some authors attribute the antidepressant activity to hypericin and its derivatives, whereas, other studies are in the favor of hyperforin. Hyperforin, as a phloroglucinol derivative is a relatively lipophilic compound which is susceptible to rapid thermal, light-induced and oxidative decomposition. Adhyperforin presents its methyl derivative. The supercritical fluid extraction (SFE) is an outstanding method for the extraction of natural agents and valuable components from plant materials, because heat-sensitive compounds can be extracted without any degradation, and in addition, it is an environmentally acceptable technology. Supercritical carbon dioxide (SCCO2) is the most useful supercritical fluid in the food industry, because it is non-toxic, non-explosive, and available in high (food grade) purity and can be removed from the extracted products without leaving any residue. The main goal of this study was oriented to the investigation of process optimization of the best extraction method applicable to intergradient in food and pharmaceutical industry - supercritical fluid extraction as well as the antimicrobial activity of obtained extracts. The first part of study will represent the literature review of St. John's Wort occurrence in nature, their health effects and medical and pharmaceutical use.",
journal = "Phytochemicals: Occurrence in Nature, Health Effects and Antioxidant Properties",
booktitle = "Supercritical extraction of phloroglucinols from St. John's wort (Hypericum Perforatum L.) - Process optimization, mathematical modeling and antimicrobial activity",
pages = "146-121",
url = "https://hdl.handle.net/21.15107/rcub_technorep_2271"
}

Glišić, S.,& Orlović, A.. (2013). Supercritical extraction of phloroglucinols from St. John's wort (Hypericum Perforatum L.) - Process optimization, mathematical modeling and antimicrobial activity. in Phytochemicals: Occurrence in Nature, Health Effects and Antioxidant Properties, 121-146.
https://hdl.handle.net/21.15107/rcub_technorep_2271

Glišić S, Orlović A. Supercritical extraction of phloroglucinols from St. John's wort (Hypericum Perforatum L.) - Process optimization, mathematical modeling and antimicrobial activity. in Phytochemicals: Occurrence in Nature, Health Effects and Antioxidant Properties. 2013;:121-146.
https://hdl.handle.net/21.15107/rcub_technorep_2271 .

Glišić, Sandra, Orlović, Aleksandar, "Supercritical extraction of phloroglucinols from St. John's wort (Hypericum Perforatum L.) - Process optimization, mathematical modeling and antimicrobial activity" in Phytochemicals: Occurrence in Nature, Health Effects and Antioxidant Properties (2013):121-146,
https://hdl.handle.net/21.15107/rcub_technorep_2271 .

TY  - JOUR
AU  - Stojanović, Dušica
AU  - Orlović, Aleksandar
AU  - Zrilić, Milorad
AU  - Balać, Igor
AU  - Tang, C. Y.
AU  - Uskoković, Petar
AU  - Aleksić, Radoslav
PY  - 2013
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2466
AB  - This article presents research on the influence of a coupling agent -methacryloxypropyltrimethoxysilane (MEMO) and cross-linking agent dicumyl peroxide (DCP) on thermal and nanomechanical properties of neat and waste polyethylene (WPE) as well as their blend. Modification of nanosilica by silanization was performed under supercritical conditions of carbon dioxide-ethanol mixture. Fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA), scanning electron microscopy (SEM), indentation as well as scratch testing at nanoscale were employed for characterization of the polymer matrix with unmodified and modified nano-SiO2 particles. Low amounts of the peroxide and silanized nano-SiO2 particles in the composite formulation significantly improved thermal and tribo-mechanical behavior at nanoscale. POLYM. COMPOS., 34:1710-1719, 2013.
PB  - Wiley, Hoboken
T2  - Polymer Composites
T1  - The Effects of Functionalization on the Thermal and Tribo-Mechanical Behaviors of Neat and Grafted Polyethylene Nanocomposites
EP  - 1719
IS  - 10
SP  - 1710
VL  - 34
DO  - 10.1002/pc.22574
ER  - 

@article{
author = "Stojanović, Dušica and Orlović, Aleksandar and Zrilić, Milorad and Balać, Igor and Tang, C. Y. and Uskoković, Petar and Aleksić, Radoslav",
year = "2013",
abstract = "This article presents research on the influence of a coupling agent -methacryloxypropyltrimethoxysilane (MEMO) and cross-linking agent dicumyl peroxide (DCP) on thermal and nanomechanical properties of neat and waste polyethylene (WPE) as well as their blend. Modification of nanosilica by silanization was performed under supercritical conditions of carbon dioxide-ethanol mixture. Fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA), scanning electron microscopy (SEM), indentation as well as scratch testing at nanoscale were employed for characterization of the polymer matrix with unmodified and modified nano-SiO2 particles. Low amounts of the peroxide and silanized nano-SiO2 particles in the composite formulation significantly improved thermal and tribo-mechanical behavior at nanoscale. POLYM. COMPOS., 34:1710-1719, 2013.",
publisher = "Wiley, Hoboken",
journal = "Polymer Composites",
title = "The Effects of Functionalization on the Thermal and Tribo-Mechanical Behaviors of Neat and Grafted Polyethylene Nanocomposites",
pages = "1719-1710",
number = "10",
volume = "34",
doi = "10.1002/pc.22574"
}

Stojanović, D., Orlović, A., Zrilić, M., Balać, I., Tang, C. Y., Uskoković, P.,& Aleksić, R.. (2013). The Effects of Functionalization on the Thermal and Tribo-Mechanical Behaviors of Neat and Grafted Polyethylene Nanocomposites. in Polymer Composites
Wiley, Hoboken., 34(10), 1710-1719.
https://doi.org/10.1002/pc.22574

Stojanović D, Orlović A, Zrilić M, Balać I, Tang CY, Uskoković P, Aleksić R. The Effects of Functionalization on the Thermal and Tribo-Mechanical Behaviors of Neat and Grafted Polyethylene Nanocomposites. in Polymer Composites. 2013;34(10):1710-1719.
doi:10.1002/pc.22574 .

Stojanović, Dušica, Orlović, Aleksandar, Zrilić, Milorad, Balać, Igor, Tang, C. Y., Uskoković, Petar, Aleksić, Radoslav, "The Effects of Functionalization on the Thermal and Tribo-Mechanical Behaviors of Neat and Grafted Polyethylene Nanocomposites" in Polymer Composites, 34, no. 10 (2013):1710-1719,
https://doi.org/10.1002/pc.22574 . .

TY  - JOUR
AU  - Dukanović, Zoran
AU  - Glišić, Sandra
AU  - Jancić-Cobanin, Vesna
AU  - Niciforović, Miroslav
AU  - Georgiou, Constantinos A.
AU  - Orlović, Aleksandar
PY  - 2013
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2486
AB  - In order to expand diesel fuel processing capacity an option to co-hydrotreat straight run gas oil blended with fraction containing FCC naphtha and light cycle oil was investigated. Industrial test run was performed under pressure of 40 bar in the catalytic reactor with two layers of conventional Co-Mo/gamma-Al2O3 catalyst, by increasing volume content of FCC naphtha and light cycle oil fraction in the reactor inlet to 20%vol. Reactor inlet temperature was also increased during the test run from 327 to 334 degrees C. Liquid hourly space velocities between 1.05 and 1.32 h(-1) have been used with H-2/oil ratios of 908-1135 Nm(3) hydrogen/m(3) oil. Sulphur inlet concentrations of 6500-8200 ppm were reduced to 36-72 ppm in the hydrotreated oil. GC-MS analysis of the sulphur compound's sub-families has shown that most of the sulphur was present in more reactive classes like alkyl substituted benzothiophenes. High conversion of sulphur was achieved by a combination of the following process parameters: high reaction temperature, low space velocity, presence of FCC naphtha in the feed and distribution of inlet sulphur dominantly concentrated in more reactive benzothiophenes. The activation energy of 33.2 kcal/mol was determined for this type of feedstock using power law kinetic expression.
PB  - Elsevier Science Bv, Amsterdam
T2  - Fuel Processing Technology
T1  - Hydrotreating of straight-run gas oil blended with FCC naphtha and light cycle oil
EP  - 165
SP  - 160
VL  - 106
DO  - 10.1016/j.fuproc.2012.07.018
ER  - 

@article{
author = "Dukanović, Zoran and Glišić, Sandra and Jancić-Cobanin, Vesna and Niciforović, Miroslav and Georgiou, Constantinos A. and Orlović, Aleksandar",
year = "2013",
abstract = "In order to expand diesel fuel processing capacity an option to co-hydrotreat straight run gas oil blended with fraction containing FCC naphtha and light cycle oil was investigated. Industrial test run was performed under pressure of 40 bar in the catalytic reactor with two layers of conventional Co-Mo/gamma-Al2O3 catalyst, by increasing volume content of FCC naphtha and light cycle oil fraction in the reactor inlet to 20%vol. Reactor inlet temperature was also increased during the test run from 327 to 334 degrees C. Liquid hourly space velocities between 1.05 and 1.32 h(-1) have been used with H-2/oil ratios of 908-1135 Nm(3) hydrogen/m(3) oil. Sulphur inlet concentrations of 6500-8200 ppm were reduced to 36-72 ppm in the hydrotreated oil. GC-MS analysis of the sulphur compound's sub-families has shown that most of the sulphur was present in more reactive classes like alkyl substituted benzothiophenes. High conversion of sulphur was achieved by a combination of the following process parameters: high reaction temperature, low space velocity, presence of FCC naphtha in the feed and distribution of inlet sulphur dominantly concentrated in more reactive benzothiophenes. The activation energy of 33.2 kcal/mol was determined for this type of feedstock using power law kinetic expression.",
publisher = "Elsevier Science Bv, Amsterdam",
journal = "Fuel Processing Technology",
title = "Hydrotreating of straight-run gas oil blended with FCC naphtha and light cycle oil",
pages = "165-160",
volume = "106",
doi = "10.1016/j.fuproc.2012.07.018"
}

Dukanović, Z., Glišić, S., Jancić-Cobanin, V., Niciforović, M., Georgiou, C. A.,& Orlović, A.. (2013). Hydrotreating of straight-run gas oil blended with FCC naphtha and light cycle oil. in Fuel Processing Technology
Elsevier Science Bv, Amsterdam., 106, 160-165.
https://doi.org/10.1016/j.fuproc.2012.07.018

Dukanović Z, Glišić S, Jancić-Cobanin V, Niciforović M, Georgiou CA, Orlović A. Hydrotreating of straight-run gas oil blended with FCC naphtha and light cycle oil. in Fuel Processing Technology. 2013;106:160-165.
doi:10.1016/j.fuproc.2012.07.018 .

Dukanović, Zoran, Glišić, Sandra, Jancić-Cobanin, Vesna, Niciforović, Miroslav, Georgiou, Constantinos A., Orlović, Aleksandar, "Hydrotreating of straight-run gas oil blended with FCC naphtha and light cycle oil" in Fuel Processing Technology, 106 (2013):160-165,
https://doi.org/10.1016/j.fuproc.2012.07.018 . .

TY  - JOUR
AU  - Stojanović, Dušica
AU  - Brajović, Ljiljana
AU  - Orlović, Aleksandar
AU  - Dramlić, Dragan
AU  - Radmilović, Velimir R.
AU  - Uskoković, Petar
AU  - Aleksić, Radoslav
PY  - 2013
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2547
AB  - This work reports the preparation of PMMA/silica nanocomposites with high optical transparency and enhanced mechanical properties using a melt compounding method. The surface of SiO2 particles was modified with a gamma-methacryloxypropyltrimethoxy silane coupling agent in a supercritical carbon dioxide-ethanol mixture and by conventional procedure. Dispersion of silica nanoparticles in ethanol at low temperatures plays an important role in deagglomeration and dispersion of nanosilica, which leads to the optimal particle-matrix bonding in composites. The optimal mechanical and optical properties were found for composites loaded with 5 wt% silica nanoparticles treated under supercritical coating method.
PB  - Elsevier Science Sa, Lausanne
T2  - Progress in Organic Coatings
T1  - Transparent PMMA/silica nanocomposites containing silica nanoparticles coating under supercritical conditions
EP  - 631
IS  - 4
SP  - 626
VL  - 76
DO  - 10.1016/j.porgcoat.2012.12.002
ER  - 

@article{
author = "Stojanović, Dušica and Brajović, Ljiljana and Orlović, Aleksandar and Dramlić, Dragan and Radmilović, Velimir R. and Uskoković, Petar and Aleksić, Radoslav",
year = "2013",
abstract = "This work reports the preparation of PMMA/silica nanocomposites with high optical transparency and enhanced mechanical properties using a melt compounding method. The surface of SiO2 particles was modified with a gamma-methacryloxypropyltrimethoxy silane coupling agent in a supercritical carbon dioxide-ethanol mixture and by conventional procedure. Dispersion of silica nanoparticles in ethanol at low temperatures plays an important role in deagglomeration and dispersion of nanosilica, which leads to the optimal particle-matrix bonding in composites. The optimal mechanical and optical properties were found for composites loaded with 5 wt% silica nanoparticles treated under supercritical coating method.",
publisher = "Elsevier Science Sa, Lausanne",
journal = "Progress in Organic Coatings",
title = "Transparent PMMA/silica nanocomposites containing silica nanoparticles coating under supercritical conditions",
pages = "631-626",
number = "4",
volume = "76",
doi = "10.1016/j.porgcoat.2012.12.002"
}

Stojanović, D., Brajović, L., Orlović, A., Dramlić, D., Radmilović, V. R., Uskoković, P.,& Aleksić, R.. (2013). Transparent PMMA/silica nanocomposites containing silica nanoparticles coating under supercritical conditions. in Progress in Organic Coatings
Elsevier Science Sa, Lausanne., 76(4), 626-631.
https://doi.org/10.1016/j.porgcoat.2012.12.002

Stojanović D, Brajović L, Orlović A, Dramlić D, Radmilović VR, Uskoković P, Aleksić R. Transparent PMMA/silica nanocomposites containing silica nanoparticles coating under supercritical conditions. in Progress in Organic Coatings. 2013;76(4):626-631.
doi:10.1016/j.porgcoat.2012.12.002 .

Stojanović, Dušica, Brajović, Ljiljana, Orlović, Aleksandar, Dramlić, Dragan, Radmilović, Velimir R., Uskoković, Petar, Aleksić, Radoslav, "Transparent PMMA/silica nanocomposites containing silica nanoparticles coating under supercritical conditions" in Progress in Organic Coatings, 76, no. 4 (2013):626-631,
https://doi.org/10.1016/j.porgcoat.2012.12.002 . .

TY  - JOUR
AU  - Lukić, Jelena M.
AU  - Nikolić, Draginja
AU  - Mandić, Valentina
AU  - Glišić, Sandra
AU  - Antonović, Dušan
AU  - Orlović, Aleksandar
PY  - 2012
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2205
AB  - Copper sulfide deposits in the insulation systems of power transformers decrease the dielectric properties of the insulation and therefore constitute a significant risk for the operation of power transformers. Disulfides, oxidized sulfur compounds, thiols, and elemental sulfur, which could be present in insulating oil, have been recognized as the sources of reactive sulfur responsible for copper sulfide formation. Selective liquid liquid extraction using N-methyl-2-pyrrolidone solvent was investigated for the purification of mineral insulating oils through the removal of compounds and precursors responsible for copper sulfide formation. The efficiency of the extraction process was evaluated using corrosive sulfur test IEC 62535, SEM/EDX measurements of paper before and after the IEC 62535 test, and measurements of the dibenzyl disulfide concentration in the oil using GC-ECD method. The oxidation stability of refined oils was evaluated using the IEC 61125 method. Precursors of copper sulfide deposits were completely removed from different mineral oils as a result of purification by extraction with N-methyl-2-pyrrolidone and 1.0 wt % water as a cosolvent.
PB  - Amer Chemical Soc, Washington
T2  - Industrial & Engineering Chemistry Research
T1  - Removal of Sulfur Compounds from Mineral Insulating Oils by Extractive Refining with N-Methyl-2-pyrrolidone
EP  - 4477
IS  - 12
SP  - 4472
VL  - 51
DO  - 10.1021/ie300450e
ER  - 

@article{
author = "Lukić, Jelena M. and Nikolić, Draginja and Mandić, Valentina and Glišić, Sandra and Antonović, Dušan and Orlović, Aleksandar",
year = "2012",
abstract = "Copper sulfide deposits in the insulation systems of power transformers decrease the dielectric properties of the insulation and therefore constitute a significant risk for the operation of power transformers. Disulfides, oxidized sulfur compounds, thiols, and elemental sulfur, which could be present in insulating oil, have been recognized as the sources of reactive sulfur responsible for copper sulfide formation. Selective liquid liquid extraction using N-methyl-2-pyrrolidone solvent was investigated for the purification of mineral insulating oils through the removal of compounds and precursors responsible for copper sulfide formation. The efficiency of the extraction process was evaluated using corrosive sulfur test IEC 62535, SEM/EDX measurements of paper before and after the IEC 62535 test, and measurements of the dibenzyl disulfide concentration in the oil using GC-ECD method. The oxidation stability of refined oils was evaluated using the IEC 61125 method. Precursors of copper sulfide deposits were completely removed from different mineral oils as a result of purification by extraction with N-methyl-2-pyrrolidone and 1.0 wt % water as a cosolvent.",
publisher = "Amer Chemical Soc, Washington",
journal = "Industrial & Engineering Chemistry Research",
title = "Removal of Sulfur Compounds from Mineral Insulating Oils by Extractive Refining with N-Methyl-2-pyrrolidone",
pages = "4477-4472",
number = "12",
volume = "51",
doi = "10.1021/ie300450e"
}

Lukić, J. M., Nikolić, D., Mandić, V., Glišić, S., Antonović, D.,& Orlović, A.. (2012). Removal of Sulfur Compounds from Mineral Insulating Oils by Extractive Refining with N-Methyl-2-pyrrolidone. in Industrial & Engineering Chemistry Research
Amer Chemical Soc, Washington., 51(12), 4472-4477.
https://doi.org/10.1021/ie300450e

Lukić JM, Nikolić D, Mandić V, Glišić S, Antonović D, Orlović A. Removal of Sulfur Compounds from Mineral Insulating Oils by Extractive Refining with N-Methyl-2-pyrrolidone. in Industrial & Engineering Chemistry Research. 2012;51(12):4472-4477.
doi:10.1021/ie300450e .

Lukić, Jelena M., Nikolić, Draginja, Mandić, Valentina, Glišić, Sandra, Antonović, Dušan, Orlović, Aleksandar, "Removal of Sulfur Compounds from Mineral Insulating Oils by Extractive Refining with N-Methyl-2-pyrrolidone" in Industrial & Engineering Chemistry Research, 51, no. 12 (2012):4472-4477,
https://doi.org/10.1021/ie300450e . .

TY  - JOUR
AU  - Almagrbi, Abdualnaser Muftah
AU  - Glišić, Sandra
AU  - Orlović, Aleksandar
PY  - 2012
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2233
AB  - Biodiesel synthesis by ethanolysis of triglycerides conducted under high pressure and at elevated temperature can lead to high levels of conversion and biodiesel yield over short reaction time. The vapour-liquid or vapour-liquid-liquid equilibrium and phase distribution of ethanol and triolein were investigated in order to determine the range of pressure and temperature required for high oil conversion. The phase equilibrium of the triolein and ethanol mixture (1:40 and 1:26 molar ratio of triolein to ethanol) was monitored in a view cell in order to determine the phase transition during heating of mixture up to 195 degrees C (the corresponding pressure was 25 and 26 bar). The experimental data were simulated using ASPENplus (R) and UniSim (R) software and results obtained using RK-Aspen EOS were found to correlate well with the experimental data. Simulation results show the important influence of the phase equilibrium on the reaction mechanism and overall kinetics under subcritical conditions (T lt  270 degrees C at 200 bar) since the two liquid phases exist at the beginning of reaction, thereby limiting the contact between the reactants. In case of single reaction phase (T gt  270 degrees C at 200 bar) the initially high reaction rate is limited at high conversion levels due to increasing extent of reversible reaction.
PB  - Elsevier Science Bv, Amsterdam
T2  - Journal of Supercritical Fluids
T1  - The phase equilibrium of triglycerides and ethanol at high pressure and temperature: The influence on kinetics of ethanolysis
EP  - 8
SP  - 2
VL  - 61
DO  - 10.1016/j.supflu.2011.10.002
ER  - 

@article{
author = "Almagrbi, Abdualnaser Muftah and Glišić, Sandra and Orlović, Aleksandar",
year = "2012",
abstract = "Biodiesel synthesis by ethanolysis of triglycerides conducted under high pressure and at elevated temperature can lead to high levels of conversion and biodiesel yield over short reaction time. The vapour-liquid or vapour-liquid-liquid equilibrium and phase distribution of ethanol and triolein were investigated in order to determine the range of pressure and temperature required for high oil conversion. The phase equilibrium of the triolein and ethanol mixture (1:40 and 1:26 molar ratio of triolein to ethanol) was monitored in a view cell in order to determine the phase transition during heating of mixture up to 195 degrees C (the corresponding pressure was 25 and 26 bar). The experimental data were simulated using ASPENplus (R) and UniSim (R) software and results obtained using RK-Aspen EOS were found to correlate well with the experimental data. Simulation results show the important influence of the phase equilibrium on the reaction mechanism and overall kinetics under subcritical conditions (T lt  270 degrees C at 200 bar) since the two liquid phases exist at the beginning of reaction, thereby limiting the contact between the reactants. In case of single reaction phase (T gt  270 degrees C at 200 bar) the initially high reaction rate is limited at high conversion levels due to increasing extent of reversible reaction.",
publisher = "Elsevier Science Bv, Amsterdam",
journal = "Journal of Supercritical Fluids",
title = "The phase equilibrium of triglycerides and ethanol at high pressure and temperature: The influence on kinetics of ethanolysis",
pages = "8-2",
volume = "61",
doi = "10.1016/j.supflu.2011.10.002"
}

Almagrbi, A. M., Glišić, S.,& Orlović, A.. (2012). The phase equilibrium of triglycerides and ethanol at high pressure and temperature: The influence on kinetics of ethanolysis. in Journal of Supercritical Fluids
Elsevier Science Bv, Amsterdam., 61, 2-8.
https://doi.org/10.1016/j.supflu.2011.10.002

Almagrbi AM, Glišić S, Orlović A. The phase equilibrium of triglycerides and ethanol at high pressure and temperature: The influence on kinetics of ethanolysis. in Journal of Supercritical Fluids. 2012;61:2-8.
doi:10.1016/j.supflu.2011.10.002 .

Almagrbi, Abdualnaser Muftah, Glišić, Sandra, Orlović, Aleksandar, "The phase equilibrium of triglycerides and ethanol at high pressure and temperature: The influence on kinetics of ethanolysis" in Journal of Supercritical Fluids, 61 (2012):2-8,
https://doi.org/10.1016/j.supflu.2011.10.002 . .

TY  - JOUR
AU  - Marinković, Dalibor
AU  - Popović, Zoran
AU  - Orlović, Aleksandar
AU  - Ristić, Mirjana
PY  - 2012
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2099
AB  - This study is based on the application of mathematical methods of statistical analysis that can be used to predict the development of motor fuel consumption in the Republic of Serbia. It is based on the linear dependence of consumption growth of motor fuel from the development of gross domestic product per capita, which is then corrected by introducing five additional influencing parameters. The model results indicate that the total consumption of motor fuels in Serbia from 2010 to 2025 will be increased by 26.5%. Individual consumption of motor fuels shows different market tendencies. Diesel fuel consumption expects to continue intensive growth to 2025, even though slightly slower than the achievements in the last decade. The current trend of declining demand for gasoline will be stopped from 2015-2016, then followed by slow growth of demand by 2025. Consumption of liquefied petroleum gasses (LPG) will enter the phase of saturation in 2015.
AB  - Ovaj rad se bazira na primeni metoda matematičke statističke analize koji mogu da posluže za predviđanje razvoja potrošnje motornih goriva u Republici Srbiji. Model je baziran na linearnoj zavisnosti rasta obima potrošnje motornih goriva od razvoja bruto domaćeg proizvoda po glavi stanovnika koja je potom korigovana uvođenjem pet dodatnih uticajnih parametara. Svakom od ovih parametara dodeljen je odgovarajući koeficijent koji odmerava specifični uticaj istog na potrošnju motornih goriva. Rezultati modela ukazuju da će ukupna potrošnja motornih goriva u Srbiji od 2010. do 2025. biti uvećana za 26,5%, sa 2,36 Mt/god na 2,99 Mt/god. Potrošnju dizel goriva očekuje nastavak intenzivnog rasta, doduše nešto usporen u odnosu na ostvarenja u prethodnoj dekadi i do 2025. potrošnja će dostići nivo od blizu 2 Mt. Postojeći trend opadanja tražnje motornih benzina biće zaustavljen 2015-2016, nakon toga sledi spori rast tražnje i do 2025. potrošnja će biti oko 550 Kt. Potrošnja tečnog naftnog gasa (TNG) nakon intenzivnog rasta od 2015. ući će u fazu saturacije, tako da će u periodu 2010-2025. godine zabeležiti mali porast potrošnje - sa 377 na 435 Kt/god.
PB  - Association of Chemical Engineers of Serbia
T2  - Hemijska industrija
T1  - Modeling of motor fuel consumption in Serbia with projection to 2025
T1  - Modelovanje potrošnje motornih goriva u Srbiji sa projekcijama do 2025. godine
EP  - 423
IS  - 3
SP  - 413
VL  - 66
DO  - 10.2298/HEMIND110224105M
ER  - 

@article{
author = "Marinković, Dalibor and Popović, Zoran and Orlović, Aleksandar and Ristić, Mirjana",
year = "2012",
abstract = "This study is based on the application of mathematical methods of statistical analysis that can be used to predict the development of motor fuel consumption in the Republic of Serbia. It is based on the linear dependence of consumption growth of motor fuel from the development of gross domestic product per capita, which is then corrected by introducing five additional influencing parameters. The model results indicate that the total consumption of motor fuels in Serbia from 2010 to 2025 will be increased by 26.5%. Individual consumption of motor fuels shows different market tendencies. Diesel fuel consumption expects to continue intensive growth to 2025, even though slightly slower than the achievements in the last decade. The current trend of declining demand for gasoline will be stopped from 2015-2016, then followed by slow growth of demand by 2025. Consumption of liquefied petroleum gasses (LPG) will enter the phase of saturation in 2015., Ovaj rad se bazira na primeni metoda matematičke statističke analize koji mogu da posluže za predviđanje razvoja potrošnje motornih goriva u Republici Srbiji. Model je baziran na linearnoj zavisnosti rasta obima potrošnje motornih goriva od razvoja bruto domaćeg proizvoda po glavi stanovnika koja je potom korigovana uvođenjem pet dodatnih uticajnih parametara. Svakom od ovih parametara dodeljen je odgovarajući koeficijent koji odmerava specifični uticaj istog na potrošnju motornih goriva. Rezultati modela ukazuju da će ukupna potrošnja motornih goriva u Srbiji od 2010. do 2025. biti uvećana za 26,5%, sa 2,36 Mt/god na 2,99 Mt/god. Potrošnju dizel goriva očekuje nastavak intenzivnog rasta, doduše nešto usporen u odnosu na ostvarenja u prethodnoj dekadi i do 2025. potrošnja će dostići nivo od blizu 2 Mt. Postojeći trend opadanja tražnje motornih benzina biće zaustavljen 2015-2016, nakon toga sledi spori rast tražnje i do 2025. potrošnja će biti oko 550 Kt. Potrošnja tečnog naftnog gasa (TNG) nakon intenzivnog rasta od 2015. ući će u fazu saturacije, tako da će u periodu 2010-2025. godine zabeležiti mali porast potrošnje - sa 377 na 435 Kt/god.",
publisher = "Association of Chemical Engineers of Serbia",
journal = "Hemijska industrija",
title = "Modeling of motor fuel consumption in Serbia with projection to 2025, Modelovanje potrošnje motornih goriva u Srbiji sa projekcijama do 2025. godine",
pages = "423-413",
number = "3",
volume = "66",
doi = "10.2298/HEMIND110224105M"
}

Marinković, D., Popović, Z., Orlović, A.,& Ristić, M.. (2012). Modeling of motor fuel consumption in Serbia with projection to 2025. in Hemijska industrija
Association of Chemical Engineers of Serbia., 66(3), 413-423.
https://doi.org/10.2298/HEMIND110224105M

Marinković D, Popović Z, Orlović A, Ristić M. Modeling of motor fuel consumption in Serbia with projection to 2025. in Hemijska industrija. 2012;66(3):413-423.
doi:10.2298/HEMIND110224105M .

Marinković, Dalibor, Popović, Zoran, Orlović, Aleksandar, Ristić, Mirjana, "Modeling of motor fuel consumption in Serbia with projection to 2025" in Hemijska industrija, 66, no. 3 (2012):413-423,
https://doi.org/10.2298/HEMIND110224105M . .

TY  - JOUR
AU  - Hatami, Tahmasb
AU  - Glišić, Sandra
AU  - Orlović, Aleksandar
PY  - 2012
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2195
AB  - Modelling and optimization of the extraction of St. John's Wort using supercritical fluid is the subject of this study. Applying conservation of mass, two partial differential equations were written for solute concentration in both solvent and solid phase. The equilibrium constant of St. John's Wort extract between solid and solvent phase was determined using genetic algorithm optimization technique. The differential equations were solved using numerical techniques simultaneously and were compared with experimental data. The results showed a good agreement between model results and experimental data. Simulation and optimization according to genetic algorithm have shown that 313 K and 20 MPa were the optimum temperature and pressure for supercritical carbon dioxide extraction of St. John's Wort.
PB  - Elsevier Science Bv, Amsterdam
T2  - Journal of Supercritical Fluids
T1  - Modelling and optimization of supercritical CO2 extraction of St. John's Wort (Hypericum perforatum L.) using genetic algorithm
EP  - 108
SP  - 102
VL  - 62
DO  - 10.1016/j.supflu.2011.12.001
ER  - 

@article{
author = "Hatami, Tahmasb and Glišić, Sandra and Orlović, Aleksandar",
year = "2012",
abstract = "Modelling and optimization of the extraction of St. John's Wort using supercritical fluid is the subject of this study. Applying conservation of mass, two partial differential equations were written for solute concentration in both solvent and solid phase. The equilibrium constant of St. John's Wort extract between solid and solvent phase was determined using genetic algorithm optimization technique. The differential equations were solved using numerical techniques simultaneously and were compared with experimental data. The results showed a good agreement between model results and experimental data. Simulation and optimization according to genetic algorithm have shown that 313 K and 20 MPa were the optimum temperature and pressure for supercritical carbon dioxide extraction of St. John's Wort.",
publisher = "Elsevier Science Bv, Amsterdam",
journal = "Journal of Supercritical Fluids",
title = "Modelling and optimization of supercritical CO2 extraction of St. John's Wort (Hypericum perforatum L.) using genetic algorithm",
pages = "108-102",
volume = "62",
doi = "10.1016/j.supflu.2011.12.001"
}

Hatami, T., Glišić, S.,& Orlović, A.. (2012). Modelling and optimization of supercritical CO2 extraction of St. John's Wort (Hypericum perforatum L.) using genetic algorithm. in Journal of Supercritical Fluids
Elsevier Science Bv, Amsterdam., 62, 102-108.
https://doi.org/10.1016/j.supflu.2011.12.001

Hatami T, Glišić S, Orlović A. Modelling and optimization of supercritical CO2 extraction of St. John's Wort (Hypericum perforatum L.) using genetic algorithm. in Journal of Supercritical Fluids. 2012;62:102-108.
doi:10.1016/j.supflu.2011.12.001 .

Hatami, Tahmasb, Glišić, Sandra, Orlović, Aleksandar, "Modelling and optimization of supercritical CO2 extraction of St. John's Wort (Hypericum perforatum L.) using genetic algorithm" in Journal of Supercritical Fluids, 62 (2012):102-108,
https://doi.org/10.1016/j.supflu.2011.12.001 . .

TY  - JOUR
AU  - Glišić, Sandra
AU  - Orlović, Aleksandar
PY  - 2012
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2215
AB  - Biodiesel, a mixture of fatty acid methyl esters, is widely used as renewable bio-based alternative fuel for internal combustion engines. Kinetic model of non-catalytic biodiesel synthesis at elevated temperature and pressure, based on triglycerides conversion, is presented in this study. The model was developed using experimental reaction data of non-catalytic biodiesel synthesis at 150 and 210 degrees C, and under pressures of 1.0 and 4.5 MPa, respectively. The phase transition during transesterification at different conditions (subcritical and supercritical) and limitations of mass transfer between two liquid phases were included in the model. This complex reaction was represented by kinetic model with three consecutive and parallel reversible reactions, while kinetic parameters were calculated using simplified procedure based on triglycerides conversion as the only variable. The developed model was found to fit the experimental data for triglyceride conversion with high accuracy.
PB  - Elsevier, Amsterdam
T2  - Journal of Supercritical Fluids
T1  - Modelling of non-catalytic biodiesel synthesis under sub and supercritical conditions: The influence of phase distribution
EP  - 70
SP  - 61
VL  - 65
DO  - 10.1016/j.supflu.2012.02.025
ER  - 

@article{
author = "Glišić, Sandra and Orlović, Aleksandar",
year = "2012",
abstract = "Biodiesel, a mixture of fatty acid methyl esters, is widely used as renewable bio-based alternative fuel for internal combustion engines. Kinetic model of non-catalytic biodiesel synthesis at elevated temperature and pressure, based on triglycerides conversion, is presented in this study. The model was developed using experimental reaction data of non-catalytic biodiesel synthesis at 150 and 210 degrees C, and under pressures of 1.0 and 4.5 MPa, respectively. The phase transition during transesterification at different conditions (subcritical and supercritical) and limitations of mass transfer between two liquid phases were included in the model. This complex reaction was represented by kinetic model with three consecutive and parallel reversible reactions, while kinetic parameters were calculated using simplified procedure based on triglycerides conversion as the only variable. The developed model was found to fit the experimental data for triglyceride conversion with high accuracy.",
publisher = "Elsevier, Amsterdam",
journal = "Journal of Supercritical Fluids",
title = "Modelling of non-catalytic biodiesel synthesis under sub and supercritical conditions: The influence of phase distribution",
pages = "70-61",
volume = "65",
doi = "10.1016/j.supflu.2012.02.025"
}

Glišić, S.,& Orlović, A.. (2012). Modelling of non-catalytic biodiesel synthesis under sub and supercritical conditions: The influence of phase distribution. in Journal of Supercritical Fluids
Elsevier, Amsterdam., 65, 61-70.
https://doi.org/10.1016/j.supflu.2012.02.025

Glišić S, Orlović A. Modelling of non-catalytic biodiesel synthesis under sub and supercritical conditions: The influence of phase distribution. in Journal of Supercritical Fluids. 2012;65:61-70.
doi:10.1016/j.supflu.2012.02.025 .

Glišić, Sandra, Orlović, Aleksandar, "Modelling of non-catalytic biodiesel synthesis under sub and supercritical conditions: The influence of phase distribution" in Journal of Supercritical Fluids, 65 (2012):61-70,
https://doi.org/10.1016/j.supflu.2012.02.025 . .

TY  - JOUR
AU  - Lukić, Jelena M.
AU  - Milosavljević, Srdjan B.
AU  - Orlović, Aleksandar
PY  - 2010
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/1658
AB  - Deposition of conductive copper sulfide on paper insulation of power transformers was recognized as a serious risk that can result in equipment failure. The aim of this study was to investigate the influence of mineral insulating oil oxidation and the presence of metal passivator on copper sulfide (Cu2S) deposition. Oil oxidation was found to increase deposition of Cu2S on the insulating paper, as confirmed by IEC 61125 B and IEC 62535 tests. The presence of oxygen resulted in an increase of copper dissolution in the oil and facilitated progressive copper sulfide deposition on the insulating paper, as confirmed by ICP, AAS, and EDX measurements. The effectiveness of aminomethyl substituted toluylbenzotriazole (TEA) metal passivator in suppressing copper sulfide formation and deposition was studied using modified IEC 62535 test. The protective role of TTA bonded to the copper plate surface and absorbed in the insulating paper was observed in tests at 140 and 150 degrees C, even for highly oxidized oils.
PB  - Amer Chemical Soc, Washington
T2  - Industrial & Engineering Chemistry Research
T1  - Degradation of the Insulating System of Power Transformers by Copper Sulfide Deposition: Influence of Oil Oxidation and Presence of Metal Passivator
EP  - 9608
IS  - 20
SP  - 9600
VL  - 49
DO  - 10.1021/ie1013458
ER  - 

@article{
author = "Lukić, Jelena M. and Milosavljević, Srdjan B. and Orlović, Aleksandar",
year = "2010",
abstract = "Deposition of conductive copper sulfide on paper insulation of power transformers was recognized as a serious risk that can result in equipment failure. The aim of this study was to investigate the influence of mineral insulating oil oxidation and the presence of metal passivator on copper sulfide (Cu2S) deposition. Oil oxidation was found to increase deposition of Cu2S on the insulating paper, as confirmed by IEC 61125 B and IEC 62535 tests. The presence of oxygen resulted in an increase of copper dissolution in the oil and facilitated progressive copper sulfide deposition on the insulating paper, as confirmed by ICP, AAS, and EDX measurements. The effectiveness of aminomethyl substituted toluylbenzotriazole (TEA) metal passivator in suppressing copper sulfide formation and deposition was studied using modified IEC 62535 test. The protective role of TTA bonded to the copper plate surface and absorbed in the insulating paper was observed in tests at 140 and 150 degrees C, even for highly oxidized oils.",
publisher = "Amer Chemical Soc, Washington",
journal = "Industrial & Engineering Chemistry Research",
title = "Degradation of the Insulating System of Power Transformers by Copper Sulfide Deposition: Influence of Oil Oxidation and Presence of Metal Passivator",
pages = "9608-9600",
number = "20",
volume = "49",
doi = "10.1021/ie1013458"
}

Lukić, J. M., Milosavljević, S. B.,& Orlović, A.. (2010). Degradation of the Insulating System of Power Transformers by Copper Sulfide Deposition: Influence of Oil Oxidation and Presence of Metal Passivator. in Industrial & Engineering Chemistry Research
Amer Chemical Soc, Washington., 49(20), 9600-9608.
https://doi.org/10.1021/ie1013458

Lukić JM, Milosavljević SB, Orlović A. Degradation of the Insulating System of Power Transformers by Copper Sulfide Deposition: Influence of Oil Oxidation and Presence of Metal Passivator. in Industrial & Engineering Chemistry Research. 2010;49(20):9600-9608.
doi:10.1021/ie1013458 .

Lukić, Jelena M., Milosavljević, Srdjan B., Orlović, Aleksandar, "Degradation of the Insulating System of Power Transformers by Copper Sulfide Deposition: Influence of Oil Oxidation and Presence of Metal Passivator" in Industrial & Engineering Chemistry Research, 49, no. 20 (2010):9600-9608,
https://doi.org/10.1021/ie1013458 . .

TY  - CONF
AU  - Kuburović, Nataša
AU  - Golubović, Aleksandar
AU  - Radović, M.
AU  - Dohcević-Mitrović, Zorana
AU  - Orlović, Aleksandar
PY  - 2010
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/1740
PB  - ICT Press, Prague
C3  - Proceedings of the 6th European Meeting on Solar Chemistry & Photocatalysis: Environmental Applicati
T1  - Influence of Fe3+ on Photo catalytic Efficiency of Nanopowder-TiO2 and CeO2 - Comparative Study
EP  - 135
SP  - 135
UR  - https://hdl.handle.net/21.15107/rcub_technorep_1740
ER  - 

@conference{
author = "Kuburović, Nataša and Golubović, Aleksandar and Radović, M. and Dohcević-Mitrović, Zorana and Orlović, Aleksandar",
year = "2010",
publisher = "ICT Press, Prague",
journal = "Proceedings of the 6th European Meeting on Solar Chemistry & Photocatalysis: Environmental Applicati",
title = "Influence of Fe3+ on Photo catalytic Efficiency of Nanopowder-TiO2 and CeO2 - Comparative Study",
pages = "135-135",
url = "https://hdl.handle.net/21.15107/rcub_technorep_1740"
}

Kuburović, N., Golubović, A., Radović, M., Dohcević-Mitrović, Z.,& Orlović, A.. (2010). Influence of Fe3+ on Photo catalytic Efficiency of Nanopowder-TiO2 and CeO2 - Comparative Study. in Proceedings of the 6th European Meeting on Solar Chemistry & Photocatalysis: Environmental Applicati
ICT Press, Prague., 135-135.
https://hdl.handle.net/21.15107/rcub_technorep_1740

Kuburović N, Golubović A, Radović M, Dohcević-Mitrović Z, Orlović A. Influence of Fe3+ on Photo catalytic Efficiency of Nanopowder-TiO2 and CeO2 - Comparative Study. in Proceedings of the 6th European Meeting on Solar Chemistry & Photocatalysis: Environmental Applicati. 2010;:135-135.
https://hdl.handle.net/21.15107/rcub_technorep_1740 .

Kuburović, Nataša, Golubović, Aleksandar, Radović, M., Dohcević-Mitrović, Zorana, Orlović, Aleksandar, "Influence of Fe3+ on Photo catalytic Efficiency of Nanopowder-TiO2 and CeO2 - Comparative Study" in Proceedings of the 6th European Meeting on Solar Chemistry & Photocatalysis: Environmental Applicati (2010):135-135,
https://hdl.handle.net/21.15107/rcub_technorep_1740 .

TY  - CONF
AU  - Dukanović, Z.
AU  - Duričković, I.
AU  - Glišić, Sandra
AU  - Orlović, Aleksandar
PY  - 2010
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/1552
AB  - Hydrotreating of middle distillates is one of the key processes in modern refining technology. Results of hydrotreating of gas oil and LCO blends, obtained in an industrial hydrotreater, are presented. Increasing temperature differences in the reactor with increasing content of LCO in the blend were observed along with substantial decrease of total sulfur in the product. A mathematical model of the industrial hydrotreater was developed to simulate the reactor behavior under different operating conditions. Cubic EOS were applied to model VLE of the reacting fluid for the ternary mixture composed of hydrogen, methane, and n-hexadecane. Validation of the model was performed using the available data obtained during the industrial test run. This is an abstract of a paper presented at the 7th European Congress of Chemical Engineering-7 and the 19th International Congress of Chemical and Process Engineering CHISA (Prague, Czech Republic 8/28/2010-9/1/2010).
PB  - 19th International Congress of Chemical and Process Engineering, CHISA 2010 and 7th European Congress of Chemical Engineering, ECCE-7
C3  - 19th International Congress of Chemical and Process Engineering, CHISA 2010 and 7th European Congres
T1  - Modelling of industrial trickle-bed reactor for hydrotreating of gas oil and light cycle oil blends
UR  - https://hdl.handle.net/21.15107/rcub_technorep_1552
ER  - 

@conference{
author = "Dukanović, Z. and Duričković, I. and Glišić, Sandra and Orlović, Aleksandar",
year = "2010",
abstract = "Hydrotreating of middle distillates is one of the key processes in modern refining technology. Results of hydrotreating of gas oil and LCO blends, obtained in an industrial hydrotreater, are presented. Increasing temperature differences in the reactor with increasing content of LCO in the blend were observed along with substantial decrease of total sulfur in the product. A mathematical model of the industrial hydrotreater was developed to simulate the reactor behavior under different operating conditions. Cubic EOS were applied to model VLE of the reacting fluid for the ternary mixture composed of hydrogen, methane, and n-hexadecane. Validation of the model was performed using the available data obtained during the industrial test run. This is an abstract of a paper presented at the 7th European Congress of Chemical Engineering-7 and the 19th International Congress of Chemical and Process Engineering CHISA (Prague, Czech Republic 8/28/2010-9/1/2010).",
publisher = "19th International Congress of Chemical and Process Engineering, CHISA 2010 and 7th European Congress of Chemical Engineering, ECCE-7",
journal = "19th International Congress of Chemical and Process Engineering, CHISA 2010 and 7th European Congres",
title = "Modelling of industrial trickle-bed reactor for hydrotreating of gas oil and light cycle oil blends",
url = "https://hdl.handle.net/21.15107/rcub_technorep_1552"
}

Dukanović, Z., Duričković, I., Glišić, S.,& Orlović, A.. (2010). Modelling of industrial trickle-bed reactor for hydrotreating of gas oil and light cycle oil blends. in 19th International Congress of Chemical and Process Engineering, CHISA 2010 and 7th European Congres
19th International Congress of Chemical and Process Engineering, CHISA 2010 and 7th European Congress of Chemical Engineering, ECCE-7..
https://hdl.handle.net/21.15107/rcub_technorep_1552

Dukanović Z, Duričković I, Glišić S, Orlović A. Modelling of industrial trickle-bed reactor for hydrotreating of gas oil and light cycle oil blends. in 19th International Congress of Chemical and Process Engineering, CHISA 2010 and 7th European Congres. 2010;.
https://hdl.handle.net/21.15107/rcub_technorep_1552 .

Dukanović, Z., Duričković, I., Glišić, Sandra, Orlović, Aleksandar, "Modelling of industrial trickle-bed reactor for hydrotreating of gas oil and light cycle oil blends" in 19th International Congress of Chemical and Process Engineering, CHISA 2010 and 7th European Congres (2010),
https://hdl.handle.net/21.15107/rcub_technorep_1552 .

TY  - JOUR
AU  - Jokić, Bojan
AU  - Drmanić, Saša
AU  - Radetić, Tamara
AU  - Krstić, Jugoslav
AU  - Petrović, Rada
AU  - Orlović, Aleksandar
AU  - Janaćković, Đorđe
PY  - 2010
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/1661
AB  - Submicron carbon spherical particles were obtained by polycondensation of resorcinol and formaldehyde in a solution and subsequent ultrasonic spray pyrolysis of the prepared sol. Microscopic characterization indicates the regular spherical shape of the obtained particles and sphere diameters in 200-700 nm range. The carbon spheres are amorphous as confirmed by electron diffraction, EELS, XRD and HREM characterization. Activation procedure was performed with H2O in a nitrogen flow for 15 and 30 min at 800 degrees C. The activation procedure preserved the initial spherical shapes of the particles while the particle porosity and specific surface area were increased. The amount of surface oxygen functionalities was also increased by activation procedure as indicated by FTIR analysis.
PB  - Elsevier, Amsterdam
T2  - Materials Letters
T1  - Synthesis of submicron carbon spheres by the ultrasonic spray pyrolysis method
EP  - 2176
IS  - 20
SP  - 2173
VL  - 64
DO  - 10.1016/j.matlet.2010.06.066
ER  - 

@article{
author = "Jokić, Bojan and Drmanić, Saša and Radetić, Tamara and Krstić, Jugoslav and Petrović, Rada and Orlović, Aleksandar and Janaćković, Đorđe",
year = "2010",
abstract = "Submicron carbon spherical particles were obtained by polycondensation of resorcinol and formaldehyde in a solution and subsequent ultrasonic spray pyrolysis of the prepared sol. Microscopic characterization indicates the regular spherical shape of the obtained particles and sphere diameters in 200-700 nm range. The carbon spheres are amorphous as confirmed by electron diffraction, EELS, XRD and HREM characterization. Activation procedure was performed with H2O in a nitrogen flow for 15 and 30 min at 800 degrees C. The activation procedure preserved the initial spherical shapes of the particles while the particle porosity and specific surface area were increased. The amount of surface oxygen functionalities was also increased by activation procedure as indicated by FTIR analysis.",
publisher = "Elsevier, Amsterdam",
journal = "Materials Letters",
title = "Synthesis of submicron carbon spheres by the ultrasonic spray pyrolysis method",
pages = "2176-2173",
number = "20",
volume = "64",
doi = "10.1016/j.matlet.2010.06.066"
}

Jokić, B., Drmanić, S., Radetić, T., Krstić, J., Petrović, R., Orlović, A.,& Janaćković, Đ.. (2010). Synthesis of submicron carbon spheres by the ultrasonic spray pyrolysis method. in Materials Letters
Elsevier, Amsterdam., 64(20), 2173-2176.
https://doi.org/10.1016/j.matlet.2010.06.066

Jokić B, Drmanić S, Radetić T, Krstić J, Petrović R, Orlović A, Janaćković Đ. Synthesis of submicron carbon spheres by the ultrasonic spray pyrolysis method. in Materials Letters. 2010;64(20):2173-2176.
doi:10.1016/j.matlet.2010.06.066 .

Jokić, Bojan, Drmanić, Saša, Radetić, Tamara, Krstić, Jugoslav, Petrović, Rada, Orlović, Aleksandar, Janaćković, Đorđe, "Synthesis of submicron carbon spheres by the ultrasonic spray pyrolysis method" in Materials Letters, 64, no. 20 (2010):2173-2176,
https://doi.org/10.1016/j.matlet.2010.06.066 . .

TY  - JOUR
AU  - Stojanović, Dušica
AU  - Orlović, Aleksandar
AU  - Glišić, Sandra
AU  - Marković, Smilja
AU  - Radmilović, Velimir R.
AU  - Uskoković, Petar
AU  - Aleksić, Radoslav
PY  - 2010
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/1701
AB  - The objective of this study is to investigate and compare methods of nanosilica coating with gamma-methacryloxypropyltrimethoxy (MEMO) silane using supercritical carbon dioxide and carbon dioxide-ethanol mixture. Characterization of grafted silane coupling agent on the nanosilica surface was performed by the infrared spectroscopy (FTIR) and thermogravimetric analysis (TGA). The d(50) value and particle size distribution were determined by laser particle size analyzer (PSA). The operating parameters of silanization process at 40 degrees C, such as the silica/silane weight ratio, the presence of ethanol, and the pressure, were found to be important for the successful coating of silica particles with minimum agglomeration. The results indicate that presence of ethanol in high-pressure carbon dioxide plays an important role in achieving successful deagglomeration of coated nanoparticles. Dynamic mechanical analysis (DMA) and scanning electron microscopy (SEM) revealed that dispersion of the silica particles in the PMMA matrix and interfacial adhesion between silica particles and polymer matrix were enhanced, when silica nanoparticles treated with silane under high pressure of carbon dioxide and ethanol were used for the nanocomposite preparation.
PB  - Elsevier, Amsterdam
T2  - Journal of Supercritical Fluids
T1  - Preparation of MEMO silane-coated SiO2 nanoparticles under high pressure of carbon dioxide and ethanol
EP  - 284
IS  - 3
SP  - 276
VL  - 52
DO  - 10.1016/j.supflu.2010.02.004
ER  - 

@article{
author = "Stojanović, Dušica and Orlović, Aleksandar and Glišić, Sandra and Marković, Smilja and Radmilović, Velimir R. and Uskoković, Petar and Aleksić, Radoslav",
year = "2010",
abstract = "The objective of this study is to investigate and compare methods of nanosilica coating with gamma-methacryloxypropyltrimethoxy (MEMO) silane using supercritical carbon dioxide and carbon dioxide-ethanol mixture. Characterization of grafted silane coupling agent on the nanosilica surface was performed by the infrared spectroscopy (FTIR) and thermogravimetric analysis (TGA). The d(50) value and particle size distribution were determined by laser particle size analyzer (PSA). The operating parameters of silanization process at 40 degrees C, such as the silica/silane weight ratio, the presence of ethanol, and the pressure, were found to be important for the successful coating of silica particles with minimum agglomeration. The results indicate that presence of ethanol in high-pressure carbon dioxide plays an important role in achieving successful deagglomeration of coated nanoparticles. Dynamic mechanical analysis (DMA) and scanning electron microscopy (SEM) revealed that dispersion of the silica particles in the PMMA matrix and interfacial adhesion between silica particles and polymer matrix were enhanced, when silica nanoparticles treated with silane under high pressure of carbon dioxide and ethanol were used for the nanocomposite preparation.",
publisher = "Elsevier, Amsterdam",
journal = "Journal of Supercritical Fluids",
title = "Preparation of MEMO silane-coated SiO2 nanoparticles under high pressure of carbon dioxide and ethanol",
pages = "284-276",
number = "3",
volume = "52",
doi = "10.1016/j.supflu.2010.02.004"
}

Stojanović, D., Orlović, A., Glišić, S., Marković, S., Radmilović, V. R., Uskoković, P.,& Aleksić, R.. (2010). Preparation of MEMO silane-coated SiO2 nanoparticles under high pressure of carbon dioxide and ethanol. in Journal of Supercritical Fluids
Elsevier, Amsterdam., 52(3), 276-284.
https://doi.org/10.1016/j.supflu.2010.02.004

Stojanović D, Orlović A, Glišić S, Marković S, Radmilović VR, Uskoković P, Aleksić R. Preparation of MEMO silane-coated SiO2 nanoparticles under high pressure of carbon dioxide and ethanol. in Journal of Supercritical Fluids. 2010;52(3):276-284.
doi:10.1016/j.supflu.2010.02.004 .

Stojanović, Dušica, Orlović, Aleksandar, Glišić, Sandra, Marković, Smilja, Radmilović, Velimir R., Uskoković, Petar, Aleksić, Radoslav, "Preparation of MEMO silane-coated SiO2 nanoparticles under high pressure of carbon dioxide and ethanol" in Journal of Supercritical Fluids, 52, no. 3 (2010):276-284,
https://doi.org/10.1016/j.supflu.2010.02.004 . .