TY  - JOUR
AU  - Spasić, Aleksandar
AU  - Manojlović, Vaso
AU  - Jovanović, Mica
PY  - 2020
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/4422
AB  - Applications of solvent extraction operations and processes play one of the most important roles in Hydrometallurgy. Therefore, in this brief review, some general concepts for selected representative applications are discussed. Also, one particular entrainment problem solution is discussed in some more details. At first, the selected general concepts for metal production of copper and uranium from their ores are presented. Then after, the leaching-solvent extraction-electro winning process for copper is shown. Finally, the extraction of uranium from wet phosphoric acid is discussed.
PB  - Association of Metallurgical Engineers of Serbia
T2  - Metallurgical & Materials Engineering
T1  - Solvent extraction and entrainment problem
EP  - 175
IS  - 2
SP  - 163
VL  - 26
DO  - 10.30544/480
ER  - 

@article{
author = "Spasić, Aleksandar and Manojlović, Vaso and Jovanović, Mica",
year = "2020",
abstract = "Applications of solvent extraction operations and processes play one of the most important roles in Hydrometallurgy. Therefore, in this brief review, some general concepts for selected representative applications are discussed. Also, one particular entrainment problem solution is discussed in some more details. At first, the selected general concepts for metal production of copper and uranium from their ores are presented. Then after, the leaching-solvent extraction-electro winning process for copper is shown. Finally, the extraction of uranium from wet phosphoric acid is discussed.",
publisher = "Association of Metallurgical Engineers of Serbia",
journal = "Metallurgical & Materials Engineering",
title = "Solvent extraction and entrainment problem",
pages = "175-163",
number = "2",
volume = "26",
doi = "10.30544/480"
}

Spasić, A., Manojlović, V.,& Jovanović, M.. (2020). Solvent extraction and entrainment problem. in Metallurgical & Materials Engineering
Association of Metallurgical Engineers of Serbia., 26(2), 163-175.
https://doi.org/10.30544/480

Spasić A, Manojlović V, Jovanović M. Solvent extraction and entrainment problem. in Metallurgical & Materials Engineering. 2020;26(2):163-175.
doi:10.30544/480 .

Spasić, Aleksandar, Manojlović, Vaso, Jovanović, Mica, "Solvent extraction and entrainment problem" in Metallurgical & Materials Engineering, 26, no. 2 (2020):163-175,
https://doi.org/10.30544/480 . .

TY  - JOUR
AU  - Spasić, Aleksandar
AU  - Jovanović, Jovan M.
AU  - Manojlović, Vaso
AU  - Jovanović, Mica
PY  - 2016
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/3222
AB  - This research focuses on the modeling of the liquid-liquid dispersed system, including particular insight on the electrocoalescence (EC) process that occurs during the breaking of double emulsions. The representative system, used in this work, was taken from the pilot plant for solvent extraction of uranium from wet phosphoric acid. The chosen framework required for elucidation of the EC process is based on the electrohydrodynamic (EHD) principles. During the model development it was necessary to consider several theoretical concepts for easier understanding and description of the related events. The first is the concept of entities, and corresponding classification of finely dispersed systems. The second concept is an introduction of almost forgotten basic electrodynamics element the memdiode or memristor as a current controlled device, and corresponding memristive systems. Hence, the conclusions that may be withdrawn from the presented results and findings could enable easier designing of the solutions for a breaking of double emulsions problems, that is, the entrainment problems that may arise in some pilot or industrial plants. Finally, the perspectives and the remaining challenges, considering the here discussed concepts and model based on the EHD principles, are mentioned.
PB  - Academic Press Inc Elsevier Science, San Diego
T2  - Journal of Colloid and Interface Science
T1  - Breaking of double emulsions based on electrohydrodynamics principles
EP  - 172
SP  - 165
VL  - 479
DO  - 10.1016/j.jcis.2016.06.061
ER  - 

@article{
author = "Spasić, Aleksandar and Jovanović, Jovan M. and Manojlović, Vaso and Jovanović, Mica",
year = "2016",
abstract = "This research focuses on the modeling of the liquid-liquid dispersed system, including particular insight on the electrocoalescence (EC) process that occurs during the breaking of double emulsions. The representative system, used in this work, was taken from the pilot plant for solvent extraction of uranium from wet phosphoric acid. The chosen framework required for elucidation of the EC process is based on the electrohydrodynamic (EHD) principles. During the model development it was necessary to consider several theoretical concepts for easier understanding and description of the related events. The first is the concept of entities, and corresponding classification of finely dispersed systems. The second concept is an introduction of almost forgotten basic electrodynamics element the memdiode or memristor as a current controlled device, and corresponding memristive systems. Hence, the conclusions that may be withdrawn from the presented results and findings could enable easier designing of the solutions for a breaking of double emulsions problems, that is, the entrainment problems that may arise in some pilot or industrial plants. Finally, the perspectives and the remaining challenges, considering the here discussed concepts and model based on the EHD principles, are mentioned.",
publisher = "Academic Press Inc Elsevier Science, San Diego",
journal = "Journal of Colloid and Interface Science",
title = "Breaking of double emulsions based on electrohydrodynamics principles",
pages = "172-165",
volume = "479",
doi = "10.1016/j.jcis.2016.06.061"
}

Spasić, A., Jovanović, J. M., Manojlović, V.,& Jovanović, M.. (2016). Breaking of double emulsions based on electrohydrodynamics principles. in Journal of Colloid and Interface Science
Academic Press Inc Elsevier Science, San Diego., 479, 165-172.
https://doi.org/10.1016/j.jcis.2016.06.061

Spasić A, Jovanović JM, Manojlović V, Jovanović M. Breaking of double emulsions based on electrohydrodynamics principles. in Journal of Colloid and Interface Science. 2016;479:165-172.
doi:10.1016/j.jcis.2016.06.061 .

Spasić, Aleksandar, Jovanović, Jovan M., Manojlović, Vaso, Jovanović, Mica, "Breaking of double emulsions based on electrohydrodynamics principles" in Journal of Colloid and Interface Science, 479 (2016):165-172,
https://doi.org/10.1016/j.jcis.2016.06.061 . .

TY  - JOUR
AU  - Savić, Marina
AU  - Jovanović, Mića
AU  - Tanasijević, Jelena
AU  - Ocić, Ozren
AU  - Spasić, Aleksandar
AU  - Jovanić, Predrag
AU  - Nikolić, Ivan
PY  - 2011
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/6331
AB  - Algoritam za redukciju otpada (eng. waste reduction algorithm – WAR) jeste metodologija
koja se može koristiti za procenu potencijalnog uticaja tehnoloških procesa na životnu
sredinu. Analizom pojedinačnih stupnjeva procesa proizvodnje dobijaju se podaci koji omogućavaju sagledavanje kritičnih segmenata. Cilj ovog rada je da se sagledaju kritične tačke
procesa proizvodnje bitumena sa stanovišta zaštite životne sredine. Definisanjem osnovnih
parametara algoritma WAR GUI (eng. waste reduction algorithm graphical user interface)
softverskog modela dobijene su kvantifikovane vrednosti potencijalnih uticaja na životnu
sredinu (eng. potential environmental impact – PEI) svakog pojedinačnog stupnja proizvodnog procesa, polazeći od procesa atmosferske destilacije, preko vakuum destilacije, do procesa dobijanja bitumena iz vakuum ostatka u postrojenju bitumena
PB  - Association of the Chemical Engineers of Serbia
T2  - Hemijska industrija
T1  - Waste reduction algorithm used as the case study of simulated bitumen production process
EP  - 204
IS  - 2
SP  - 197
VL  - 65
DO  - 10.2298/HEMIND101108011S
ER  - 

@article{
author = "Savić, Marina and Jovanović, Mića and Tanasijević, Jelena and Ocić, Ozren and Spasić, Aleksandar and Jovanić, Predrag and Nikolić, Ivan",
year = "2011",
abstract = "Algoritam za redukciju otpada (eng. waste reduction algorithm – WAR) jeste metodologija
koja se može koristiti za procenu potencijalnog uticaja tehnoloških procesa na životnu
sredinu. Analizom pojedinačnih stupnjeva procesa proizvodnje dobijaju se podaci koji omogućavaju sagledavanje kritičnih segmenata. Cilj ovog rada je da se sagledaju kritične tačke
procesa proizvodnje bitumena sa stanovišta zaštite životne sredine. Definisanjem osnovnih
parametara algoritma WAR GUI (eng. waste reduction algorithm graphical user interface)
softverskog modela dobijene su kvantifikovane vrednosti potencijalnih uticaja na životnu
sredinu (eng. potential environmental impact – PEI) svakog pojedinačnog stupnja proizvodnog procesa, polazeći od procesa atmosferske destilacije, preko vakuum destilacije, do procesa dobijanja bitumena iz vakuum ostatka u postrojenju bitumena",
publisher = "Association of the Chemical Engineers of Serbia",
journal = "Hemijska industrija",
title = "Waste reduction algorithm used as the case study of simulated bitumen production process",
pages = "204-197",
number = "2",
volume = "65",
doi = "10.2298/HEMIND101108011S"
}

Savić, M., Jovanović, M., Tanasijević, J., Ocić, O., Spasić, A., Jovanić, P.,& Nikolić, I.. (2011). Waste reduction algorithm used as the case study of simulated bitumen production process. in Hemijska industrija
Association of the Chemical Engineers of Serbia., 65(2), 197-204.
https://doi.org/10.2298/HEMIND101108011S

Savić M, Jovanović M, Tanasijević J, Ocić O, Spasić A, Jovanić P, Nikolić I. Waste reduction algorithm used as the case study of simulated bitumen production process. in Hemijska industrija. 2011;65(2):197-204.
doi:10.2298/HEMIND101108011S .

Savić, Marina, Jovanović, Mića, Tanasijević, Jelena, Ocić, Ozren, Spasić, Aleksandar, Jovanić, Predrag, Nikolić, Ivan, "Waste reduction algorithm used as the case study of simulated bitumen production process" in Hemijska industrija, 65, no. 2 (2011):197-204,
https://doi.org/10.2298/HEMIND101108011S . .

TY  - JOUR
AU  - Milivojević, Milan
AU  - Duduković, Aleksandar
AU  - Obradović, Bojana
AU  - Spasić, Aleksandar
AU  - Bugarski, Branko
PY  - 2004
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/653
AB  - In this study we analyzed the effects of the hydrodynamic conditions and properties of the working fluid on the operation of external loop air lift bioreactors. In particular, the effects of design and operating parameters (e.g. reactor geometry, design of the gas sparger, superficial gas velocity, flow regime) as well as the fluid properties (liquid viscosity and addition of surfactants) on the liquid superficial velocity and gas hold-up were defined. Several correlations found in the literature based on theoretical models of fluid flow, as well as several semi-empirical and empirical correlations were tested and the applicability of all the proposed correlations was verified on the available experimental data. The most accurate correlations for the prediction of the gas hold up, liquid circulation velocity and slip velocity in each bioreactor operating regime were identified.
AB  - U ovom radu je izvršena analiza uticaja osnovnih hidrodinamičkih parametara pneumatskog reaktora i procesnog fluida na karakteristike rada pneumatskog reaktora sa spoljašnjom recirkulacijom. Definisan je uticaj projektnih i operativnih parametara (geometrije reaktora, raspodeljivača faza, površinske brzine gasa, režima strujanja i dr.) kao i osobina fluida (viskoziteta tečnosti i prisustva površinski aktivnih materija) na površinsku brzinu tečnosti i udeo gasa. Za predviđanje rada pneumatskog bioreaktora korišćen je veći broj literaturno dostupnih korelacija, kako onih koje su izvedene iz nekog od modela strujanja tako i onih poluempirijskih i empirijskih. Primenljivost korelacija je proverena na širem opsegu eksperimentalnih podataka, a dat je i predlog jednačina pomoću koji se mogu u pojedinim režimima rada najtačnije predvideti hidrodinamičke osobine ovih reaktora.
PB  - Association of Chemical Engineers of Serbia
T2  - Hemijska industrija
T1  - Analysis of the hydrodynamic parameters of external loop air lift bioreactors
T1  - Analiza hidrodinamičkih parametara pneumatskih bioreaktora sa spoljašnjom recirkulacijom
EP  - 18
IS  - 1
SP  - 10
VL  - 58
DO  - 10.2298/HEMIND0401010M
ER  - 

@article{
author = "Milivojević, Milan and Duduković, Aleksandar and Obradović, Bojana and Spasić, Aleksandar and Bugarski, Branko",
year = "2004",
abstract = "In this study we analyzed the effects of the hydrodynamic conditions and properties of the working fluid on the operation of external loop air lift bioreactors. In particular, the effects of design and operating parameters (e.g. reactor geometry, design of the gas sparger, superficial gas velocity, flow regime) as well as the fluid properties (liquid viscosity and addition of surfactants) on the liquid superficial velocity and gas hold-up were defined. Several correlations found in the literature based on theoretical models of fluid flow, as well as several semi-empirical and empirical correlations were tested and the applicability of all the proposed correlations was verified on the available experimental data. The most accurate correlations for the prediction of the gas hold up, liquid circulation velocity and slip velocity in each bioreactor operating regime were identified., U ovom radu je izvršena analiza uticaja osnovnih hidrodinamičkih parametara pneumatskog reaktora i procesnog fluida na karakteristike rada pneumatskog reaktora sa spoljašnjom recirkulacijom. Definisan je uticaj projektnih i operativnih parametara (geometrije reaktora, raspodeljivača faza, površinske brzine gasa, režima strujanja i dr.) kao i osobina fluida (viskoziteta tečnosti i prisustva površinski aktivnih materija) na površinsku brzinu tečnosti i udeo gasa. Za predviđanje rada pneumatskog bioreaktora korišćen je veći broj literaturno dostupnih korelacija, kako onih koje su izvedene iz nekog od modela strujanja tako i onih poluempirijskih i empirijskih. Primenljivost korelacija je proverena na širem opsegu eksperimentalnih podataka, a dat je i predlog jednačina pomoću koji se mogu u pojedinim režimima rada najtačnije predvideti hidrodinamičke osobine ovih reaktora.",
publisher = "Association of Chemical Engineers of Serbia",
journal = "Hemijska industrija",
title = "Analysis of the hydrodynamic parameters of external loop air lift bioreactors, Analiza hidrodinamičkih parametara pneumatskih bioreaktora sa spoljašnjom recirkulacijom",
pages = "18-10",
number = "1",
volume = "58",
doi = "10.2298/HEMIND0401010M"
}

Milivojević, M., Duduković, A., Obradović, B., Spasić, A.,& Bugarski, B.. (2004). Analysis of the hydrodynamic parameters of external loop air lift bioreactors. in Hemijska industrija
Association of Chemical Engineers of Serbia., 58(1), 10-18.
https://doi.org/10.2298/HEMIND0401010M

Milivojević M, Duduković A, Obradović B, Spasić A, Bugarski B. Analysis of the hydrodynamic parameters of external loop air lift bioreactors. in Hemijska industrija. 2004;58(1):10-18.
doi:10.2298/HEMIND0401010M .

Milivojević, Milan, Duduković, Aleksandar, Obradović, Bojana, Spasić, Aleksandar, Bugarski, Branko, "Analysis of the hydrodynamic parameters of external loop air lift bioreactors" in Hemijska industrija, 58, no. 1 (2004):10-18,
https://doi.org/10.2298/HEMIND0401010M . .

TY  - JOUR
AU  - Jokanović, Vukoman
AU  - Janaćković, Đorđe
AU  - Spasić, Aleksandar
AU  - Uskoković, Dragan
PY  - 1996
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/95
AB  - Synthesis of high-purity submicrometer spherical particles of oc-alumina is performed by ultrasonic spray pyrolysis. As precursors, 0.5 M water solutions of both AlCl3 . 6H(2)O and Al(NO3)(3) . 9H(2)O have been used. The influence of aerosol droplet genesis on the particle size distribution of alpha-alumina is regarded as a main control parameter. In the case of very fine droplets (smaller than 0.3 mu m), regardless of the precursor, the precipitation of dissolved compound inside the droplet occurs by the volume precipitation mechanism. Morphology of the particles corresponds to that of the realized aerosol droplets. An increased activity of produced powders enables the phase transformation of gamma- to alpha-alumina in the temperature range 1073 similar to 1173 K, while at 1273 K the transformation process is complete.
PB  - Japan Inst Metals & Materials, Sendai
T2  - Materials Transactions Jim
T1  - Synthesis and formation mechanism of ultrafine spherical Al2O3 powders by ultrasonic spray pyrolysis
EP  - 635
IS  - 4
SP  - 627
VL  - 37
DO  - 10.2320/matertrans1989.37.627
ER  - 

@article{
author = "Jokanović, Vukoman and Janaćković, Đorđe and Spasić, Aleksandar and Uskoković, Dragan",
year = "1996",
abstract = "Synthesis of high-purity submicrometer spherical particles of oc-alumina is performed by ultrasonic spray pyrolysis. As precursors, 0.5 M water solutions of both AlCl3 . 6H(2)O and Al(NO3)(3) . 9H(2)O have been used. The influence of aerosol droplet genesis on the particle size distribution of alpha-alumina is regarded as a main control parameter. In the case of very fine droplets (smaller than 0.3 mu m), regardless of the precursor, the precipitation of dissolved compound inside the droplet occurs by the volume precipitation mechanism. Morphology of the particles corresponds to that of the realized aerosol droplets. An increased activity of produced powders enables the phase transformation of gamma- to alpha-alumina in the temperature range 1073 similar to 1173 K, while at 1273 K the transformation process is complete.",
publisher = "Japan Inst Metals & Materials, Sendai",
journal = "Materials Transactions Jim",
title = "Synthesis and formation mechanism of ultrafine spherical Al2O3 powders by ultrasonic spray pyrolysis",
pages = "635-627",
number = "4",
volume = "37",
doi = "10.2320/matertrans1989.37.627"
}

Jokanović, V., Janaćković, Đ., Spasić, A.,& Uskoković, D.. (1996). Synthesis and formation mechanism of ultrafine spherical Al2O3 powders by ultrasonic spray pyrolysis. in Materials Transactions Jim
Japan Inst Metals & Materials, Sendai., 37(4), 627-635.
https://doi.org/10.2320/matertrans1989.37.627

Jokanović V, Janaćković Đ, Spasić A, Uskoković D. Synthesis and formation mechanism of ultrafine spherical Al2O3 powders by ultrasonic spray pyrolysis. in Materials Transactions Jim. 1996;37(4):627-635.
doi:10.2320/matertrans1989.37.627 .

Jokanović, Vukoman, Janaćković, Đorđe, Spasić, Aleksandar, Uskoković, Dragan, "Synthesis and formation mechanism of ultrafine spherical Al2O3 powders by ultrasonic spray pyrolysis" in Materials Transactions Jim, 37, no. 4 (1996):627-635,
https://doi.org/10.2320/matertrans1989.37.627 . .