TY  - JOUR
AU  - Grubor, Borislav
AU  - Dakić, Dragoljub V.
AU  - Nemoda, Stevan
AU  - Mladenović, Milica R.
AU  - Paprika, Milijana
AU  - Oka, Simeon N.
PY  - 2019
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8985
AB  - The paper gives a review of the most important results of extensive targeted fundamental research program on fluidized bed combustion in the Laboratory for Thermal Engineering and Energy of the VINCA Institute of Nuclear Sciences. The paper presents a detailed overview of research activities from the beginning in the second half of the 1970'' up to present days. Starting with the motives for initiating the investigations in this field, the paper highlights various phases of research and points out the main results of all research activities, not only the ones that are focused in this paper. Targeted fundamental research topics that are overviewed in this paper are heat and mass transfer, coal particle fragmentation, char particle combustion, sulfur self-retention by coal ash itself, as well as circulating fluidized bed modeling.
T2  - Thermal Science
T1  - Research in the fluidized bed combustion in the Laboratory for thermal engineering and energy - Part A: Achievements in targeted fundamental research
VL  - 23
IS  - Suppl. 5
SP  - 1637
EP  - 1653
DO  - 10.2298/TSCI180725289G
ER  - 

@article{
author = "Grubor, Borislav and Dakić, Dragoljub V. and Nemoda, Stevan and Mladenović, Milica R. and Paprika, Milijana and Oka, Simeon N.",
year = "2019",
abstract = "The paper gives a review of the most important results of extensive targeted fundamental research program on fluidized bed combustion in the Laboratory for Thermal Engineering and Energy of the VINCA Institute of Nuclear Sciences. The paper presents a detailed overview of research activities from the beginning in the second half of the 1970'' up to present days. Starting with the motives for initiating the investigations in this field, the paper highlights various phases of research and points out the main results of all research activities, not only the ones that are focused in this paper. Targeted fundamental research topics that are overviewed in this paper are heat and mass transfer, coal particle fragmentation, char particle combustion, sulfur self-retention by coal ash itself, as well as circulating fluidized bed modeling.",
journal = "Thermal Science",
title = "Research in the fluidized bed combustion in the Laboratory for thermal engineering and energy - Part A: Achievements in targeted fundamental research",
volume = "23",
number = "Suppl. 5",
pages = "1637-1653",
doi = "10.2298/TSCI180725289G"
}

Grubor, B., Dakić, D. V., Nemoda, S., Mladenović, M. R., Paprika, M.,& Oka, S. N.. (2019). Research in the fluidized bed combustion in the Laboratory for thermal engineering and energy - Part A: Achievements in targeted fundamental research. in Thermal Science, 23(Suppl. 5), 1637-1653.
https://doi.org/10.2298/TSCI180725289G

Grubor B, Dakić DV, Nemoda S, Mladenović MR, Paprika M, Oka SN. Research in the fluidized bed combustion in the Laboratory for thermal engineering and energy - Part A: Achievements in targeted fundamental research. in Thermal Science. 2019;23(Suppl. 5):1637-1653.
doi:10.2298/TSCI180725289G .

Grubor, Borislav, Dakić, Dragoljub V., Nemoda, Stevan, Mladenović, Milica R., Paprika, Milijana, Oka, Simeon N., "Research in the fluidized bed combustion in the Laboratory for thermal engineering and energy - Part A: Achievements in targeted fundamental research" in Thermal Science, 23, no. Suppl. 5 (2019):1637-1653,
https://doi.org/10.2298/TSCI180725289G . .

TY  - JOUR
AU  - Grubor, Borislav
AU  - Dakić, Dragoljub V.
AU  - Nemoda, Stevan
AU  - Mladenović, Milica R.
AU  - Paprika, Milijana
AU  - Oka, Simeon N.
PY  - 2019
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8988
AB  - Paper gives a review of the most important results of extensive and wide-ranging research program on R&D of fluidized bed combustion technology in the Laboratory for Thermal Engineering and Energy of the VINCA Institute of Nuclear Sciences. Paper presents detailed overview of R&D activities from the beginning in the second half of the 1970's up to present days. These activities encompass applied research achievements in the field of characterization of limestones and bed agglomeration and sintering and modeling of overall processes during fluidized bed combustion, all of which have facilitated the R&D of the fluidized bed combustion technology. Attention is also given to steady-state combustion testing of a wide-range of fuels (coals, liquid fuels, biomass, waste solid and liquid materials, etc.) in our fluidized bed combustor and development of original methodology for testing the suitability of fuels for fluidized bed combustion, as well as specific achievements in the area of technology application in Serbia.
T2  - Thermal Science
T1  - Research in the fluidized bed combustion in the Laboratory for thermal engineering and energy - Part B: Achievements in technology implementation
VL  - 23
IS  - Suppl. 5
SP  - 1655
EP  - 1667
DO  - 10.2298/TSCI180725290G
ER  - 

@article{
author = "Grubor, Borislav and Dakić, Dragoljub V. and Nemoda, Stevan and Mladenović, Milica R. and Paprika, Milijana and Oka, Simeon N.",
year = "2019",
abstract = "Paper gives a review of the most important results of extensive and wide-ranging research program on R&D of fluidized bed combustion technology in the Laboratory for Thermal Engineering and Energy of the VINCA Institute of Nuclear Sciences. Paper presents detailed overview of R&D activities from the beginning in the second half of the 1970's up to present days. These activities encompass applied research achievements in the field of characterization of limestones and bed agglomeration and sintering and modeling of overall processes during fluidized bed combustion, all of which have facilitated the R&D of the fluidized bed combustion technology. Attention is also given to steady-state combustion testing of a wide-range of fuels (coals, liquid fuels, biomass, waste solid and liquid materials, etc.) in our fluidized bed combustor and development of original methodology for testing the suitability of fuels for fluidized bed combustion, as well as specific achievements in the area of technology application in Serbia.",
journal = "Thermal Science",
title = "Research in the fluidized bed combustion in the Laboratory for thermal engineering and energy - Part B: Achievements in technology implementation",
volume = "23",
number = "Suppl. 5",
pages = "1655-1667",
doi = "10.2298/TSCI180725290G"
}

Grubor, B., Dakić, D. V., Nemoda, S., Mladenović, M. R., Paprika, M.,& Oka, S. N.. (2019). Research in the fluidized bed combustion in the Laboratory for thermal engineering and energy - Part B: Achievements in technology implementation. in Thermal Science, 23(Suppl. 5), 1655-1667.
https://doi.org/10.2298/TSCI180725290G

Grubor B, Dakić DV, Nemoda S, Mladenović MR, Paprika M, Oka SN. Research in the fluidized bed combustion in the Laboratory for thermal engineering and energy - Part B: Achievements in technology implementation. in Thermal Science. 2019;23(Suppl. 5):1655-1667.
doi:10.2298/TSCI180725290G .

Grubor, Borislav, Dakić, Dragoljub V., Nemoda, Stevan, Mladenović, Milica R., Paprika, Milijana, Oka, Simeon N., "Research in the fluidized bed combustion in the Laboratory for thermal engineering and energy - Part B: Achievements in technology implementation" in Thermal Science, 23, no. Suppl. 5 (2019):1655-1667,
https://doi.org/10.2298/TSCI180725290G . .

TY  - JOUR
AU  - Nemoda, Stevan
AU  - Mladenović, Milica R.
AU  - Paprika, Milijana
AU  - Erić, Aleksandar
AU  - Grubor, Borislav
PY  - 2016
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1140
AB  - The paper presents a 2-D CFD model of liquid fuel combustion in bubbling fluidized bed. The numerical procedure is based on the two-fluid Euler-Euler approach, where the velocity field of the gas and particles are modeled in analogy to the kinetic gas theory. The model is taking into account also the third liquid phase, as well as its interaction with the solid and gas phase. The proposed numerical model comprise energy equations for all three phases, as well as the transport equations of chemical components with source terms originated from the component conversion. In the frame of the proposed model, user sub-models were developed for heterogenic fluidized bed combustion of liquid fuels, with or without water. The results of the calculation were compared with experiments on a pilot-facility (power up to 100 kW), combusting, among other fuels, oil. The temperature profiles along the combustion chamber were compared for the two basic cases: combustion with or without water. On the basis of numerical experiments, influence of the fluid-dynamic characteristics of the fluidized bed on the combustion efficiency was analyzed, as well as the influence of the fuel characteristics (reactivity, water content) on the intensive combustion zone.
T2  - Thermal Science
T1  - Three phase eulerian-granular model applied on numerical simulation of non-conventional liquid fuels combustion in a bubbling fluidized bed
VL  - 20
SP  - S133
EP  - S149
DO  - 10.2298/TSCI151025196N
ER  - 

@article{
author = "Nemoda, Stevan and Mladenović, Milica R. and Paprika, Milijana and Erić, Aleksandar and Grubor, Borislav",
year = "2016",
abstract = "The paper presents a 2-D CFD model of liquid fuel combustion in bubbling fluidized bed. The numerical procedure is based on the two-fluid Euler-Euler approach, where the velocity field of the gas and particles are modeled in analogy to the kinetic gas theory. The model is taking into account also the third liquid phase, as well as its interaction with the solid and gas phase. The proposed numerical model comprise energy equations for all three phases, as well as the transport equations of chemical components with source terms originated from the component conversion. In the frame of the proposed model, user sub-models were developed for heterogenic fluidized bed combustion of liquid fuels, with or without water. The results of the calculation were compared with experiments on a pilot-facility (power up to 100 kW), combusting, among other fuels, oil. The temperature profiles along the combustion chamber were compared for the two basic cases: combustion with or without water. On the basis of numerical experiments, influence of the fluid-dynamic characteristics of the fluidized bed on the combustion efficiency was analyzed, as well as the influence of the fuel characteristics (reactivity, water content) on the intensive combustion zone.",
journal = "Thermal Science",
title = "Three phase eulerian-granular model applied on numerical simulation of non-conventional liquid fuels combustion in a bubbling fluidized bed",
volume = "20",
pages = "S133-S149",
doi = "10.2298/TSCI151025196N"
}

Nemoda, S., Mladenović, M. R., Paprika, M., Erić, A.,& Grubor, B.. (2016). Three phase eulerian-granular model applied on numerical simulation of non-conventional liquid fuels combustion in a bubbling fluidized bed. in Thermal Science, 20, S133-S149.
https://doi.org/10.2298/TSCI151025196N

Nemoda S, Mladenović MR, Paprika M, Erić A, Grubor B. Three phase eulerian-granular model applied on numerical simulation of non-conventional liquid fuels combustion in a bubbling fluidized bed. in Thermal Science. 2016;20:S133-S149.
doi:10.2298/TSCI151025196N .

Nemoda, Stevan, Mladenović, Milica R., Paprika, Milijana, Erić, Aleksandar, Grubor, Borislav, "Three phase eulerian-granular model applied on numerical simulation of non-conventional liquid fuels combustion in a bubbling fluidized bed" in Thermal Science, 20 (2016):S133-S149,
https://doi.org/10.2298/TSCI151025196N . .

TY  - JOUR
AU  - Stefanović, Sandra
AU  - Stevanović, Žarko M.
AU  - Grubor, Borislav
AU  - Stevanović, Žana
AU  - Živković, Marija M.
AU  - Djurovic-Petrovic, Maja D.
PY  - 2014
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7035
AB  - Paper presents comparative analysis of residential indoor air pollutant concentration change over future specified time horizon, implementing building physical and thermal retrofit measures, thus creating pollution mitigation scenarios for existing Belgrade and Nis housing stock followed by greenhouse gas emission reduction scenarios up to 2050. Regarding specified mitigation scenarios, the set of typical housing unit models has been generated which define existing housing stock of Belgrade and Nis. Extensive monitoring of physical and thermal parameters as well as detailed socio-technical survey of selected households was performed and used as an initial modeling input. Relationship between environment pollution and building performances was investigated, with respect to indoor-outdoor sources of pollution, thermal and physical properties of the stock samples and occupants behavior. As a final output, indoor pollutant concentrations for each of the modelled cases was obtained and validated against the available data. This housing modelling framework has been created in order to develop an assessment of present and future exposure and health impact quantity regarding single/multiple scenario interventions introduced to the housing stock. This paper provides each strategy guidelines for taking measures towards achieving the healthier indoor environments.
T2  - Thermal Science
T1  - Comparative Analyses of Built Environment Exposures Relevant to Health of Greenhouse Gas Emissions Reduction Strategies in Serbia
VL  - 18
IS  - 3
SP  - 903
EP  - 914
DO  - 10.2298/TSCI1403903S
ER  - 

@article{
author = "Stefanović, Sandra and Stevanović, Žarko M. and Grubor, Borislav and Stevanović, Žana and Živković, Marija M. and Djurovic-Petrovic, Maja D.",
year = "2014",
abstract = "Paper presents comparative analysis of residential indoor air pollutant concentration change over future specified time horizon, implementing building physical and thermal retrofit measures, thus creating pollution mitigation scenarios for existing Belgrade and Nis housing stock followed by greenhouse gas emission reduction scenarios up to 2050. Regarding specified mitigation scenarios, the set of typical housing unit models has been generated which define existing housing stock of Belgrade and Nis. Extensive monitoring of physical and thermal parameters as well as detailed socio-technical survey of selected households was performed and used as an initial modeling input. Relationship between environment pollution and building performances was investigated, with respect to indoor-outdoor sources of pollution, thermal and physical properties of the stock samples and occupants behavior. As a final output, indoor pollutant concentrations for each of the modelled cases was obtained and validated against the available data. This housing modelling framework has been created in order to develop an assessment of present and future exposure and health impact quantity regarding single/multiple scenario interventions introduced to the housing stock. This paper provides each strategy guidelines for taking measures towards achieving the healthier indoor environments.",
journal = "Thermal Science",
title = "Comparative Analyses of Built Environment Exposures Relevant to Health of Greenhouse Gas Emissions Reduction Strategies in Serbia",
volume = "18",
number = "3",
pages = "903-914",
doi = "10.2298/TSCI1403903S"
}

Stefanović, S., Stevanović, Ž. M., Grubor, B., Stevanović, Ž., Živković, M. M.,& Djurovic-Petrovic, M. D.. (2014). Comparative Analyses of Built Environment Exposures Relevant to Health of Greenhouse Gas Emissions Reduction Strategies in Serbia. in Thermal Science, 18(3), 903-914.
https://doi.org/10.2298/TSCI1403903S

Stefanović S, Stevanović ŽM, Grubor B, Stevanović Ž, Živković MM, Djurovic-Petrovic MD. Comparative Analyses of Built Environment Exposures Relevant to Health of Greenhouse Gas Emissions Reduction Strategies in Serbia. in Thermal Science. 2014;18(3):903-914.
doi:10.2298/TSCI1403903S .

Stefanović, Sandra, Stevanović, Žarko M., Grubor, Borislav, Stevanović, Žana, Živković, Marija M., Djurovic-Petrovic, Maja D., "Comparative Analyses of Built Environment Exposures Relevant to Health of Greenhouse Gas Emissions Reduction Strategies in Serbia" in Thermal Science, 18, no. 3 (2014):903-914,
https://doi.org/10.2298/TSCI1403903S . .

TY  - JOUR
AU  - Bakić, Vukman
AU  - Pezo, Milada L.
AU  - Stevanović, Žana
AU  - Živković, Marija M.
AU  - Grubor, Borislav
PY  - 2012
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/5054
AB  - In this paper, a PV/Wind integrated hybrid power energy system is analyzed using the dynamical simulation method. The market for the distributed power generation based on renewable energy is increasing, particularly for the standalone mini-grid applications. The main design components of PV/Wind hybrid system are the PV panels and the wind turbine. The case study is realized using the meteorological data for a Typical Metrological Year (TMY) for the city of Belgrade, in Serbia. The dynamical analysis is based on the transient system simulation program TRNSYS 16. The purpose of the study is to design a realistic energy system that maximizes the use of renewable energy and minimizes the use of fossil fuels. The reduction in the CO2 emissions is also analyzed in the paper. (C) 2011 Elsevier Ltd. All rights reserved.
T2  - Energy
T1  - Dynamical simulation of PV/Wind hybrid energy conversion system
VL  - 45
IS  - 1
SP  - 324
EP  - 328
DO  - 10.1016/j.energy.2011.11.063
ER  - 

@article{
author = "Bakić, Vukman and Pezo, Milada L. and Stevanović, Žana and Živković, Marija M. and Grubor, Borislav",
year = "2012",
abstract = "In this paper, a PV/Wind integrated hybrid power energy system is analyzed using the dynamical simulation method. The market for the distributed power generation based on renewable energy is increasing, particularly for the standalone mini-grid applications. The main design components of PV/Wind hybrid system are the PV panels and the wind turbine. The case study is realized using the meteorological data for a Typical Metrological Year (TMY) for the city of Belgrade, in Serbia. The dynamical analysis is based on the transient system simulation program TRNSYS 16. The purpose of the study is to design a realistic energy system that maximizes the use of renewable energy and minimizes the use of fossil fuels. The reduction in the CO2 emissions is also analyzed in the paper. (C) 2011 Elsevier Ltd. All rights reserved.",
journal = "Energy",
title = "Dynamical simulation of PV/Wind hybrid energy conversion system",
volume = "45",
number = "1",
pages = "324-328",
doi = "10.1016/j.energy.2011.11.063"
}

Bakić, V., Pezo, M. L., Stevanović, Ž., Živković, M. M.,& Grubor, B.. (2012). Dynamical simulation of PV/Wind hybrid energy conversion system. in Energy, 45(1), 324-328.
https://doi.org/10.1016/j.energy.2011.11.063

Bakić V, Pezo ML, Stevanović Ž, Živković MM, Grubor B. Dynamical simulation of PV/Wind hybrid energy conversion system. in Energy. 2012;45(1):324-328.
doi:10.1016/j.energy.2011.11.063 .

Bakić, Vukman, Pezo, Milada L., Stevanović, Žana, Živković, Marija M., Grubor, Borislav, "Dynamical simulation of PV/Wind hybrid energy conversion system" in Energy, 45, no. 1 (2012):324-328,
https://doi.org/10.1016/j.energy.2011.11.063 . .

TY  - JOUR
AU  - Grubor, Borislav
PY  - 2009
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/3859
T2  - Thermal Science
T1  - In memory of Ljubomir Jovanovic (1935-2009)
VL  - 13
IS  - 4
SP  - 7
EP  - 10
UR  - https://hdl.handle.net/21.15107/rcub_vinar_3859
ER  - 

@article{
author = "Grubor, Borislav",
year = "2009",
journal = "Thermal Science",
title = "In memory of Ljubomir Jovanovic (1935-2009)",
volume = "13",
number = "4",
pages = "7-10",
url = "https://hdl.handle.net/21.15107/rcub_vinar_3859"
}

Grubor, B.. (2009). In memory of Ljubomir Jovanovic (1935-2009). in Thermal Science, 13(4), 7-10.
https://hdl.handle.net/21.15107/rcub_vinar_3859

Grubor B. In memory of Ljubomir Jovanovic (1935-2009). in Thermal Science. 2009;13(4):7-10.
https://hdl.handle.net/21.15107/rcub_vinar_3859 .

Grubor, Borislav, "In memory of Ljubomir Jovanovic (1935-2009)" in Thermal Science, 13, no. 4 (2009):7-10,
https://hdl.handle.net/21.15107/rcub_vinar_3859 .

TY  - JOUR
AU  - Nemoda, Stevan
AU  - Belošević, Srđan
AU  - Mladenović, Milica
AU  - Dakić, Dragoljub
AU  - Stefanović, Predrag
AU  - Grubor, Borislav
AU  - Cvetinović, Dejan
AU  - Spasojević, Vuk
PY  - 2008
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/11208
AB  - У раду је предложен флуид - порозни медијум модел нумеричке симулације флуидизованог слоја (ФС), код кога се густа фаза ФС посматра као фиксни порозни медијум, а интеракција између гаса и честица, као и појава мехурасте фазе, се моделира на основу биланса сила трења између гаса и честица у густој фази ФС, узимајући у обзир интеракције између честица и ефекте судара честица. Овакав приступ моделирању ФС погодан је за брзе инжењерске прорачуне стационарног стања флуидизационог медијума у постројењима са ФС. Предложени поступак моделирања ФС је примењен на нумеричку 2-Д симулацију увођења бочног млаза флуида у ложиште са ФС, која је обухватила одређивање дужине продора млаза у ФС, као и анализу ефеката мешања млазно дозираног гасног горива са флуидизационим флуидом - оксидатором. Резултати прорачуна дужине продора бочног млаза у ФС су упоређени и верификовани са резултатима експеримената из литературе. Генерални закључак нумеричких и експерименталних анализа је да на дужину продора млаза у ФС изузетан утицај има брзина флуида на излазу из млазнице, док угао нагиба млаза, као и висина млазнице, имају далеко слабији утицај. Нумерички експерименти са интензитетом мешања компоненти (горива у млазници и оксидатора у основној струји гаса за флуидизацију), показују да утицај брзине на излазу из млазнице, као и угао нагиба млазнице, слично као код анализе дужине продора млаза у ФС, мало утичу на ниво измешаности компоненти. Међутим, приликом анализе утицаја висине увођења горива, показано је да положај млазнице по висини слоја значајно утиче на интензитет мешања хемијских компоненти у ФС, што није било могуће закључити само на основу анализе дужине продора млаза у ФС.
AB  - The paper presents a fluid-porous medium model, developed for the Purpose of fluidized bed (FB) numerical simulation. In the model, a Dense phase is considered to be a fixed porous medium, while gas-particle interactions and the occurrence of bubbling phase are modeled on the basis of a balance of friction forces between gas and particles in the dense phase, taking into account antiparticle collisions. The suggested procedure of FB modeling has been applied to a 2-D numerical simulation of lateral jet injection of fluid into the fluidized combustor. The simulation has included de termination of jet penetration length into the FB, as well as an analysis of the effects of mixing of injected gaseous fuel with fluidizing fluid - oxidizer. A general conclusion of numerical and literature experimental analyses is that jet penetration length into the FB is strongly affected by fluid velocity at the nozzle outlet, while the nozzle inclination angle, as well as the height of the nozzle as placed into the FB furnace, have by far less significant influence. However, during analyzing the impact of fuel intake height, it has been demonstrated that the nozzle vertical position along the FB has a significant influence on the mixing rate of chemical components in the FB, which could not be concluded only from the analysis of the jet penetration length into the FB.
T2  - Termotehnika
T1  - Нумеричка симулација продора гасовитог млаза у флуидизовани слој
T1  - Numerical simulation of gas jet penetration into a fluidized bed
VL  - 34
IS  - 2-3
SP  - 97
EP  - 116
UR  - https://hdl.handle.net/21.15107/rcub_vinar_11208
ER  - 

@article{
author = "Nemoda, Stevan and Belošević, Srđan and Mladenović, Milica and Dakić, Dragoljub and Stefanović, Predrag and Grubor, Borislav and Cvetinović, Dejan and Spasojević, Vuk",
year = "2008",
abstract = "У раду је предложен флуид - порозни медијум модел нумеричке симулације флуидизованог слоја (ФС), код кога се густа фаза ФС посматра као фиксни порозни медијум, а интеракција између гаса и честица, као и појава мехурасте фазе, се моделира на основу биланса сила трења између гаса и честица у густој фази ФС, узимајући у обзир интеракције између честица и ефекте судара честица. Овакав приступ моделирању ФС погодан је за брзе инжењерске прорачуне стационарног стања флуидизационог медијума у постројењима са ФС. Предложени поступак моделирања ФС је примењен на нумеричку 2-Д симулацију увођења бочног млаза флуида у ложиште са ФС, која је обухватила одређивање дужине продора млаза у ФС, као и анализу ефеката мешања млазно дозираног гасног горива са флуидизационим флуидом - оксидатором. Резултати прорачуна дужине продора бочног млаза у ФС су упоређени и верификовани са резултатима експеримената из литературе. Генерални закључак нумеричких и експерименталних анализа је да на дужину продора млаза у ФС изузетан утицај има брзина флуида на излазу из млазнице, док угао нагиба млаза, као и висина млазнице, имају далеко слабији утицај. Нумерички експерименти са интензитетом мешања компоненти (горива у млазници и оксидатора у основној струји гаса за флуидизацију), показују да утицај брзине на излазу из млазнице, као и угао нагиба млазнице, слично као код анализе дужине продора млаза у ФС, мало утичу на ниво измешаности компоненти. Међутим, приликом анализе утицаја висине увођења горива, показано је да положај млазнице по висини слоја значајно утиче на интензитет мешања хемијских компоненти у ФС, што није било могуће закључити само на основу анализе дужине продора млаза у ФС., The paper presents a fluid-porous medium model, developed for the Purpose of fluidized bed (FB) numerical simulation. In the model, a Dense phase is considered to be a fixed porous medium, while gas-particle interactions and the occurrence of bubbling phase are modeled on the basis of a balance of friction forces between gas and particles in the dense phase, taking into account antiparticle collisions. The suggested procedure of FB modeling has been applied to a 2-D numerical simulation of lateral jet injection of fluid into the fluidized combustor. The simulation has included de termination of jet penetration length into the FB, as well as an analysis of the effects of mixing of injected gaseous fuel with fluidizing fluid - oxidizer. A general conclusion of numerical and literature experimental analyses is that jet penetration length into the FB is strongly affected by fluid velocity at the nozzle outlet, while the nozzle inclination angle, as well as the height of the nozzle as placed into the FB furnace, have by far less significant influence. However, during analyzing the impact of fuel intake height, it has been demonstrated that the nozzle vertical position along the FB has a significant influence on the mixing rate of chemical components in the FB, which could not be concluded only from the analysis of the jet penetration length into the FB.",
journal = "Termotehnika",
title = "Нумеричка симулација продора гасовитог млаза у флуидизовани слој, Numerical simulation of gas jet penetration into a fluidized bed",
volume = "34",
number = "2-3",
pages = "97-116",
url = "https://hdl.handle.net/21.15107/rcub_vinar_11208"
}

Nemoda, S., Belošević, S., Mladenović, M., Dakić, D., Stefanović, P., Grubor, B., Cvetinović, D.,& Spasojević, V.. (2008). Нумеричка симулација продора гасовитог млаза у флуидизовани слој. in Termotehnika, 34(2-3), 97-116.
https://hdl.handle.net/21.15107/rcub_vinar_11208

Nemoda S, Belošević S, Mladenović M, Dakić D, Stefanović P, Grubor B, Cvetinović D, Spasojević V. Нумеричка симулација продора гасовитог млаза у флуидизовани слој. in Termotehnika. 2008;34(2-3):97-116.
https://hdl.handle.net/21.15107/rcub_vinar_11208 .

Nemoda, Stevan, Belošević, Srđan, Mladenović, Milica, Dakić, Dragoljub, Stefanović, Predrag, Grubor, Borislav, Cvetinović, Dejan, Spasojević, Vuk, "Нумеричка симулација продора гасовитог млаза у флуидизовани слој" in Termotehnika, 34, no. 2-3 (2008):97-116,
https://hdl.handle.net/21.15107/rcub_vinar_11208 .

TY  - JOUR
AU  - Schneider, Daniel R.
AU  - Duic, Neven
AU  - Raguzin, Igor
AU  - Bogdan, Zeljko
AU  - Ban, Marko
AU  - Grubor, Borislav
AU  - Stefanović, Predrag Lj.
AU  - Dakić, Dragoljub V.
AU  - Repić, Branislav
AU  - Stevanović, Žarko M.
AU  - Zbogar, Ana
AU  - Studovic, Maja
AU  - Nemoda, Stevan
AU  - Oka, Nikola
AU  - Đurović, Dejan M.
AU  - Kadic, Nikola
AU  - Bakić, Vukman
AU  - Belošević, Srđan
AU  - Erić, Aleksandar
AU  - Mladenovic, Rastko
AU  - Paprika, Milijana
AU  - Delalic, Nijaz
AU  - Lekic, Alija
AU  - Bajramovic, Rasim
AU  - Teskeredzic, Armin
AU  - Smajevic, Izet
AU  - Dzaferovic, Ejub
AU  - Begic, Fajik
AU  - Lulic, Haris
AU  - Metovic, Sadjit
AU  - Petrović, Semin
AU  - Djugum, Adnan
AU  - Kadric, Dzana
AU  - Hodzic, Nihad
AU  - Kulic, Fahrudin
AU  - Kazagic, Anes
AU  - Gafic, Admir
PY  - 2007
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/3433
AB  - Although the countries of the Western Balkans are mostly electrified, there are still regions which do not have access to the electricity network or where the network capacity is insufficient. For the most part such areas are under special care of the state (i.e. underdeveloped, devastated by war, depopulated), on islands or in mountainous regions. Since the decentralized energy generation covers a broad range of technologies, including many renewable energy technologies that provide small-scale power at sites close to the users, such concept could be of interest for these locations. This paper identfies the areas in Western Balkans where such systems could be applied Consideration is given to geographical locations as well as possible applications. Wind hydro, solar photovoltaic, and biomass conversion systems were taken into consideration. Since the renewable energy sources data for Western Balkans region are rather scarce, the intention was to give a survey of the present situation and an estimate of future polential for decentralized energy generation based on renewable energy sources. The decentralized energy generation based on renewable energy sources in Western Balkans will find its niche easier for the users that will produce electricity for their own needs and for the users located in remote rural areas (off-grid applications).
T2  - Thermal Science
T1  - Mapping the potential for decentralized energy generation based on RES in Western Balkans
VL  - 11
IS  - 3
SP  - 7
EP  - 26
DO  - 10.2298/TSC10703007S
ER  - 

@article{
author = "Schneider, Daniel R. and Duic, Neven and Raguzin, Igor and Bogdan, Zeljko and Ban, Marko and Grubor, Borislav and Stefanović, Predrag Lj. and Dakić, Dragoljub V. and Repić, Branislav and Stevanović, Žarko M. and Zbogar, Ana and Studovic, Maja and Nemoda, Stevan and Oka, Nikola and Đurović, Dejan M. and Kadic, Nikola and Bakić, Vukman and Belošević, Srđan and Erić, Aleksandar and Mladenovic, Rastko and Paprika, Milijana and Delalic, Nijaz and Lekic, Alija and Bajramovic, Rasim and Teskeredzic, Armin and Smajevic, Izet and Dzaferovic, Ejub and Begic, Fajik and Lulic, Haris and Metovic, Sadjit and Petrović, Semin and Djugum, Adnan and Kadric, Dzana and Hodzic, Nihad and Kulic, Fahrudin and Kazagic, Anes and Gafic, Admir",
year = "2007",
abstract = "Although the countries of the Western Balkans are mostly electrified, there are still regions which do not have access to the electricity network or where the network capacity is insufficient. For the most part such areas are under special care of the state (i.e. underdeveloped, devastated by war, depopulated), on islands or in mountainous regions. Since the decentralized energy generation covers a broad range of technologies, including many renewable energy technologies that provide small-scale power at sites close to the users, such concept could be of interest for these locations. This paper identfies the areas in Western Balkans where such systems could be applied Consideration is given to geographical locations as well as possible applications. Wind hydro, solar photovoltaic, and biomass conversion systems were taken into consideration. Since the renewable energy sources data for Western Balkans region are rather scarce, the intention was to give a survey of the present situation and an estimate of future polential for decentralized energy generation based on renewable energy sources. The decentralized energy generation based on renewable energy sources in Western Balkans will find its niche easier for the users that will produce electricity for their own needs and for the users located in remote rural areas (off-grid applications).",
journal = "Thermal Science",
title = "Mapping the potential for decentralized energy generation based on RES in Western Balkans",
volume = "11",
number = "3",
pages = "7-26",
doi = "10.2298/TSC10703007S"
}

Schneider, D. R., Duic, N., Raguzin, I., Bogdan, Z., Ban, M., Grubor, B., Stefanović, P. Lj., Dakić, D. V., Repić, B., Stevanović, Ž. M., Zbogar, A., Studovic, M., Nemoda, S., Oka, N., Đurović, D. M., Kadic, N., Bakić, V., Belošević, S., Erić, A., Mladenovic, R., Paprika, M., Delalic, N., Lekic, A., Bajramovic, R., Teskeredzic, A., Smajevic, I., Dzaferovic, E., Begic, F., Lulic, H., Metovic, S., Petrović, S., Djugum, A., Kadric, D., Hodzic, N., Kulic, F., Kazagic, A.,& Gafic, A.. (2007). Mapping the potential for decentralized energy generation based on RES in Western Balkans. in Thermal Science, 11(3), 7-26.
https://doi.org/10.2298/TSC10703007S

Schneider DR, Duic N, Raguzin I, Bogdan Z, Ban M, Grubor B, Stefanović PL, Dakić DV, Repić B, Stevanović ŽM, Zbogar A, Studovic M, Nemoda S, Oka N, Đurović DM, Kadic N, Bakić V, Belošević S, Erić A, Mladenovic R, Paprika M, Delalic N, Lekic A, Bajramovic R, Teskeredzic A, Smajevic I, Dzaferovic E, Begic F, Lulic H, Metovic S, Petrović S, Djugum A, Kadric D, Hodzic N, Kulic F, Kazagic A, Gafic A. Mapping the potential for decentralized energy generation based on RES in Western Balkans. in Thermal Science. 2007;11(3):7-26.
doi:10.2298/TSC10703007S .

Schneider, Daniel R., Duic, Neven, Raguzin, Igor, Bogdan, Zeljko, Ban, Marko, Grubor, Borislav, Stefanović, Predrag Lj., Dakić, Dragoljub V., Repić, Branislav, Stevanović, Žarko M., Zbogar, Ana, Studovic, Maja, Nemoda, Stevan, Oka, Nikola, Đurović, Dejan M., Kadic, Nikola, Bakić, Vukman, Belošević, Srđan, Erić, Aleksandar, Mladenovic, Rastko, Paprika, Milijana, Delalic, Nijaz, Lekic, Alija, Bajramovic, Rasim, Teskeredzic, Armin, Smajevic, Izet, Dzaferovic, Ejub, Begic, Fajik, Lulic, Haris, Metovic, Sadjit, Petrović, Semin, Djugum, Adnan, Kadric, Dzana, Hodzic, Nihad, Kulic, Fahrudin, Kazagic, Anes, Gafic, Admir, "Mapping the potential for decentralized energy generation based on RES in Western Balkans" in Thermal Science, 11, no. 3 (2007):7-26,
https://doi.org/10.2298/TSC10703007S . .

TY  - JOUR
AU  - Manovic, V
AU  - Grubor, Borislav
AU  - Lončarević, Davor
PY  - 2006
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/2973
AB  - The process of inherent sulfur capture in coal particles during combustion in fluidized bed was modeled. The significance of the process is in fact that a part of sulfur may be retained in ash, decreasing emission of sulfur oxides. The process, which is also known as sulfur self-retention, is influenced by parameters that depend on coal characteristics and combustion conditions. The interest for this process was increased with the introduction of fluidized bed combustion technology because of its favorable temperatures and other conditions. The presented model is based on a model of porous char particles combustion under fluidized bed conditions, and the changing grain size model of sulfation of the CaO grains dispersed throughout the char particle volume. The phenomena of sintering, reduction of the produced CaSO4 with CO and thermal decomposition of the produced CaSO4 were incorporated in the model, allowing for the different reactivities of various forms of calcium. A temperature-dependent relation for the CaO grain radius takes sintering into account. Reductive and thermal decomposition were taken into account by the corresponding reaction rate constants of the Arrhenius type. The reactivity of the calcium forms in coal was considered by different initial radius of the CaO grains. A comprehensive parametric analysis of the model was done. The model was verified by the experimental results for three low-rank Serbian coals. Samples of different particle size (4.0-7.0, 7.0-10.0 and 10.0-13.0 mm) for each coal were combusted under fluidized bed conditions at three temperatures: 750, 800 and 850 degrees C. The maximal values of inherent sulfur capture at 800 degrees C were obtained. The comparison with the experimentally obtained results showed that the model can adequately predict the levels of the obtained values of sulfur self-retention efficiencies, as well as the influence of temperature, coal type and coal particle size. (c) 2005 Elsevier Ltd. All rights reserved.
T2  - Chemical Engineering Science
T1  - Modeling of inherent SO2 capture in coal particles during combustion in fluidized bed
VL  - 61
IS  - 5
SP  - 1676
EP  - 1685
DO  - 10.1016/j.ces.2005.10.003
ER  - 

@article{
author = "Manovic, V and Grubor, Borislav and Lončarević, Davor",
year = "2006",
abstract = "The process of inherent sulfur capture in coal particles during combustion in fluidized bed was modeled. The significance of the process is in fact that a part of sulfur may be retained in ash, decreasing emission of sulfur oxides. The process, which is also known as sulfur self-retention, is influenced by parameters that depend on coal characteristics and combustion conditions. The interest for this process was increased with the introduction of fluidized bed combustion technology because of its favorable temperatures and other conditions. The presented model is based on a model of porous char particles combustion under fluidized bed conditions, and the changing grain size model of sulfation of the CaO grains dispersed throughout the char particle volume. The phenomena of sintering, reduction of the produced CaSO4 with CO and thermal decomposition of the produced CaSO4 were incorporated in the model, allowing for the different reactivities of various forms of calcium. A temperature-dependent relation for the CaO grain radius takes sintering into account. Reductive and thermal decomposition were taken into account by the corresponding reaction rate constants of the Arrhenius type. The reactivity of the calcium forms in coal was considered by different initial radius of the CaO grains. A comprehensive parametric analysis of the model was done. The model was verified by the experimental results for three low-rank Serbian coals. Samples of different particle size (4.0-7.0, 7.0-10.0 and 10.0-13.0 mm) for each coal were combusted under fluidized bed conditions at three temperatures: 750, 800 and 850 degrees C. The maximal values of inherent sulfur capture at 800 degrees C were obtained. The comparison with the experimentally obtained results showed that the model can adequately predict the levels of the obtained values of sulfur self-retention efficiencies, as well as the influence of temperature, coal type and coal particle size. (c) 2005 Elsevier Ltd. All rights reserved.",
journal = "Chemical Engineering Science",
title = "Modeling of inherent SO2 capture in coal particles during combustion in fluidized bed",
volume = "61",
number = "5",
pages = "1676-1685",
doi = "10.1016/j.ces.2005.10.003"
}

Manovic, V., Grubor, B.,& Lončarević, D.. (2006). Modeling of inherent SO2 capture in coal particles during combustion in fluidized bed. in Chemical Engineering Science, 61(5), 1676-1685.
https://doi.org/10.1016/j.ces.2005.10.003

Manovic V, Grubor B, Lončarević D. Modeling of inherent SO2 capture in coal particles during combustion in fluidized bed. in Chemical Engineering Science. 2006;61(5):1676-1685.
doi:10.1016/j.ces.2005.10.003 .

Manovic, V, Grubor, Borislav, Lončarević, Davor, "Modeling of inherent SO2 capture in coal particles during combustion in fluidized bed" in Chemical Engineering Science, 61, no. 5 (2006):1676-1685,
https://doi.org/10.1016/j.ces.2005.10.003 . .

TY  - JOUR
AU  - Manovic, V
AU  - Grubor, Borislav
PY  - 2006
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/2567
AB  - The overall process of coal combustion takes place in two successive steps: devolatilization and char combustion. The fate of sulfur during the devolatilization of coal of different rank was investigated. The significance of the investigation is in fact that a major part of sulfur release occurs during devolatilization of coal, (i.e., emission of sulfur oxides during combustion of coal largely depends on sulfur release during devolatilization). The experimental investigations were conducted to obtain the data about the quantitative relation between sulfur content in the coal and sulfur content in the char. Standard procedures were used for obtaining the chars in a laboratory oven and determining the sulfur forms in the coal and char samples. The experiments were done with grounded coal samples ( LT 0.2 mm), at the temperatures in the range of 500-1000 degrees C. We showed that the amount of sulfur remaining in the char decreases, but not significantly in the temperature range 600-900 degrees C. On the basis of the theoretical consideration of behavior of sulfur forms during devolatilization, certain simplifying assumptions, and obtained experimental data, we propose two correlations to associate the content of sulfur in the coal and in the char. The correlations are based on the results of the proximate analysis and sulfur forms in coal. Good agreement was found when the proposed correlations were compared with the experimental results obtained for investigated coals. Moreover, the correlations were verified by results found in the literature for numerous Polish, Albanian, and Turkish coals. Significant correlations (P LT 0.05) between observed and calculated data with correlation coefficient, R GT 0.9, were noticed in the case of all coals.
T2  - Energy and Fuels
T1  - Correlation for the total sulfur content in char after devolatilization
VL  - 20
IS  - 1
SP  - 133
EP  - 137
DO  - 10.1021/ef050244a
ER  - 

@article{
author = "Manovic, V and Grubor, Borislav",
year = "2006",
abstract = "The overall process of coal combustion takes place in two successive steps: devolatilization and char combustion. The fate of sulfur during the devolatilization of coal of different rank was investigated. The significance of the investigation is in fact that a major part of sulfur release occurs during devolatilization of coal, (i.e., emission of sulfur oxides during combustion of coal largely depends on sulfur release during devolatilization). The experimental investigations were conducted to obtain the data about the quantitative relation between sulfur content in the coal and sulfur content in the char. Standard procedures were used for obtaining the chars in a laboratory oven and determining the sulfur forms in the coal and char samples. The experiments were done with grounded coal samples ( LT 0.2 mm), at the temperatures in the range of 500-1000 degrees C. We showed that the amount of sulfur remaining in the char decreases, but not significantly in the temperature range 600-900 degrees C. On the basis of the theoretical consideration of behavior of sulfur forms during devolatilization, certain simplifying assumptions, and obtained experimental data, we propose two correlations to associate the content of sulfur in the coal and in the char. The correlations are based on the results of the proximate analysis and sulfur forms in coal. Good agreement was found when the proposed correlations were compared with the experimental results obtained for investigated coals. Moreover, the correlations were verified by results found in the literature for numerous Polish, Albanian, and Turkish coals. Significant correlations (P LT 0.05) between observed and calculated data with correlation coefficient, R GT 0.9, were noticed in the case of all coals.",
journal = "Energy and Fuels",
title = "Correlation for the total sulfur content in char after devolatilization",
volume = "20",
number = "1",
pages = "133-137",
doi = "10.1021/ef050244a"
}

Manovic, V.,& Grubor, B.. (2006). Correlation for the total sulfur content in char after devolatilization. in Energy and Fuels, 20(1), 133-137.
https://doi.org/10.1021/ef050244a

Manovic V, Grubor B. Correlation for the total sulfur content in char after devolatilization. in Energy and Fuels. 2006;20(1):133-137.
doi:10.1021/ef050244a .

Manovic, V, Grubor, Borislav, "Correlation for the total sulfur content in char after devolatilization" in Energy and Fuels, 20, no. 1 (2006):133-137,
https://doi.org/10.1021/ef050244a . .

TY  - CONF
AU  - Oka, Simeon N.
AU  - Grubor, Borislav
AU  - Dakić, Dragoljub V.
AU  - Ilic, M.
AU  - Manovic, V.
AU  - Erić, Milić D.
AU  - Paprika, Milijana
AU  - Oka, Nikola
AU  - Belošević, Srđan
AU  - Mladenovic, R.
AU  - Crnomarković, Nenad Đ.
PY  - 2005
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/6638
AB  - The results of the detailed investigations of behavior of lignites Kolubara and Kovin, in fluidized bed combustion are presented in the paper. Investigation was carried out due to the interest of the Serbian Electric Power Production Company to use CFBC boilers in the process of refurbishment of old pulverized coal combustion boilers. As a part of a feasibility study for CFBC use in power plants in Serbia, investigation of combustion characteristics of lignites was performed using original methodology introduced many years ago by Laboratory for Thermal Engineering and Energy. Methodology was approved by numerous investigations of more than 20 Yugoslav coals for FBC combustion, with the aim to determine design data for bubbling FBC boilers. The main attention in present investigation was paid to the problem of using methodology developed for bubbling FBC in the conditions present in CFBC boilers. Four samples of Kolubara lignite, with heat capacity from 2.5 to 8.5 MJ/kg, and different ash contents were investigated, and also lignite Kovin in the same range of heat capacity. Investigations were performed in three phases: (1) ultimate and proximate analysis, determination of ash sintering temperature by standard method and in fluidized bed laboratory oven, (2) investigations in laboratory fluidized bed furnace and determination of coal particle fragmentation, burning rate, start-up temperature and self-sulfure-capture and (3) investigation of combustion in pilot-plant in stationary combustion conditions. In conclusion, suitability of results obtained in BFBC conditions is approved, and earlier statement that lignites are suitable for BFBC is confirmed by the statement that lignites are even more suitable for burning in CFBC boilers. Considering differences between combustion and flow conditions in bubbling and circulating FBC boilers, behavior of the lignites in CFBC is discussed in details and optimal regime parameters of the CFBC boilers are determined. The results obtained will be used by Serbian Electric Power Production Company for evaluation of bid for CFBC boiler implementation in refurbishment of old thermal power plants.
T1  - Investigation of the suitability of Serbian lignites for burning in CFBC boilers
SP  - 13
EP  - 25
UR  - https://hdl.handle.net/21.15107/rcub_vinar_6638
ER  - 

@conference{
author = "Oka, Simeon N. and Grubor, Borislav and Dakić, Dragoljub V. and Ilic, M. and Manovic, V. and Erić, Milić D. and Paprika, Milijana and Oka, Nikola and Belošević, Srđan and Mladenovic, R. and Crnomarković, Nenad Đ.",
year = "2005",
abstract = "The results of the detailed investigations of behavior of lignites Kolubara and Kovin, in fluidized bed combustion are presented in the paper. Investigation was carried out due to the interest of the Serbian Electric Power Production Company to use CFBC boilers in the process of refurbishment of old pulverized coal combustion boilers. As a part of a feasibility study for CFBC use in power plants in Serbia, investigation of combustion characteristics of lignites was performed using original methodology introduced many years ago by Laboratory for Thermal Engineering and Energy. Methodology was approved by numerous investigations of more than 20 Yugoslav coals for FBC combustion, with the aim to determine design data for bubbling FBC boilers. The main attention in present investigation was paid to the problem of using methodology developed for bubbling FBC in the conditions present in CFBC boilers. Four samples of Kolubara lignite, with heat capacity from 2.5 to 8.5 MJ/kg, and different ash contents were investigated, and also lignite Kovin in the same range of heat capacity. Investigations were performed in three phases: (1) ultimate and proximate analysis, determination of ash sintering temperature by standard method and in fluidized bed laboratory oven, (2) investigations in laboratory fluidized bed furnace and determination of coal particle fragmentation, burning rate, start-up temperature and self-sulfure-capture and (3) investigation of combustion in pilot-plant in stationary combustion conditions. In conclusion, suitability of results obtained in BFBC conditions is approved, and earlier statement that lignites are suitable for BFBC is confirmed by the statement that lignites are even more suitable for burning in CFBC boilers. Considering differences between combustion and flow conditions in bubbling and circulating FBC boilers, behavior of the lignites in CFBC is discussed in details and optimal regime parameters of the CFBC boilers are determined. The results obtained will be used by Serbian Electric Power Production Company for evaluation of bid for CFBC boiler implementation in refurbishment of old thermal power plants.",
title = "Investigation of the suitability of Serbian lignites for burning in CFBC boilers",
pages = "13-25",
url = "https://hdl.handle.net/21.15107/rcub_vinar_6638"
}

Oka, S. N., Grubor, B., Dakić, D. V., Ilic, M., Manovic, V., Erić, M. D., Paprika, M., Oka, N., Belošević, S., Mladenovic, R.,& Crnomarković, N. Đ.. (2005). Investigation of the suitability of Serbian lignites for burning in CFBC boilers. , 13-25.
https://hdl.handle.net/21.15107/rcub_vinar_6638

Oka SN, Grubor B, Dakić DV, Ilic M, Manovic V, Erić MD, Paprika M, Oka N, Belošević S, Mladenovic R, Crnomarković NĐ. Investigation of the suitability of Serbian lignites for burning in CFBC boilers. 2005;:13-25.
https://hdl.handle.net/21.15107/rcub_vinar_6638 .

Oka, Simeon N., Grubor, Borislav, Dakić, Dragoljub V., Ilic, M., Manovic, V., Erić, Milić D., Paprika, Milijana, Oka, Nikola, Belošević, Srđan, Mladenovic, R., Crnomarković, Nenad Đ., "Investigation of the suitability of Serbian lignites for burning in CFBC boilers" (2005):13-25,
https://hdl.handle.net/21.15107/rcub_vinar_6638 .

TY  - JOUR
AU  - Manovic, V
AU  - Grubor, Borislav
PY  - 2004
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/2790
AB  - The purpose of this study was to determine the cause of the experimentally noticed decrease of sulfate sulfur during a thermal treatment of coal. In the case of the pyrolysis of the investigated six coals of different rank and with a widely differing sulfur contents, the decrease of the amount of sulfate sulfur was often GT 50% and, in some cases, GT 80%. The analysis of the obtained results indicates that this effect may be attributed to the overrated values of the sulfate sulfur in coal, which are the result of certain erroneous effects of the hydrochloric acid (HCl) treatment of coal, which is used during the standard procedures for sulfate sulfur determination. It is shown that, because of the HCl treatment, a portion of the organic and/or pyritic sulfur is identified as sulfate sulfur. This effect may be expected to be more pronounced in the case of low-rank coals, as well as in coals that have a relatively large content of pyritic sulfur.
T2  - Energy and Fuels
T1  - A study of misleading effects of HCl treatment in the characterization of sulfur in coal
VL  - 18
IS  - 4
SP  - 1169
EP  - 1174
DO  - 10.1021/ef049964s
ER  - 

@article{
author = "Manovic, V and Grubor, Borislav",
year = "2004",
abstract = "The purpose of this study was to determine the cause of the experimentally noticed decrease of sulfate sulfur during a thermal treatment of coal. In the case of the pyrolysis of the investigated six coals of different rank and with a widely differing sulfur contents, the decrease of the amount of sulfate sulfur was often GT 50% and, in some cases, GT 80%. The analysis of the obtained results indicates that this effect may be attributed to the overrated values of the sulfate sulfur in coal, which are the result of certain erroneous effects of the hydrochloric acid (HCl) treatment of coal, which is used during the standard procedures for sulfate sulfur determination. It is shown that, because of the HCl treatment, a portion of the organic and/or pyritic sulfur is identified as sulfate sulfur. This effect may be expected to be more pronounced in the case of low-rank coals, as well as in coals that have a relatively large content of pyritic sulfur.",
journal = "Energy and Fuels",
title = "A study of misleading effects of HCl treatment in the characterization of sulfur in coal",
volume = "18",
number = "4",
pages = "1169-1174",
doi = "10.1021/ef049964s"
}

Manovic, V.,& Grubor, B.. (2004). A study of misleading effects of HCl treatment in the characterization of sulfur in coal. in Energy and Fuels, 18(4), 1169-1174.
https://doi.org/10.1021/ef049964s

Manovic V, Grubor B. A study of misleading effects of HCl treatment in the characterization of sulfur in coal. in Energy and Fuels. 2004;18(4):1169-1174.
doi:10.1021/ef049964s .

Manovic, V, Grubor, Borislav, "A study of misleading effects of HCl treatment in the characterization of sulfur in coal" in Energy and Fuels, 18, no. 4 (2004):1169-1174,
https://doi.org/10.1021/ef049964s . .

TY  - JOUR
AU  - Manovic, V
AU  - Grubor, Borislav
AU  - Repić, Branislav
AU  - Mladenović, Milica R.
AU  - Jovanović, Marina P.
PY  - 2003
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/2689
AB  - The sulfur release during combustion of six Serbian coals of different rank (from lignite to semi-anthracite) and sulfur content (0.28 - 6.04 %) was determined by analyzing the content of various sulfur forms in coal, char and ash samples. Based on theoretical considerations and behaviour of sulfur compounds during the processes of devolatilization and char combustion, correlations are proposed for estimation of the amount of sulfur released during devolatilization as well as during the overall process of coal combustion. Both correlations take into account the results of the proximate analysis of coal and that of the sulfur forms in the coal, while for the second one the sulfur retention efficiency during char combustion (eta) is needed. The correlations were successfully verified by using the obtained experimental data, as well as the data found in literature. For most of the coals the same value of eta = 0.7 may be used, unless if the molar Ca/S ratio is significantly smaller than 1.
T2  - Fresenius Environmental Bulletin
T1  - Sulfur release during combustion of Serbian coals
VL  - 12
IS  - 11
SP  - 1348
EP  - 1353
UR  - https://hdl.handle.net/21.15107/rcub_vinar_2689
ER  - 

@article{
author = "Manovic, V and Grubor, Borislav and Repić, Branislav and Mladenović, Milica R. and Jovanović, Marina P.",
year = "2003",
abstract = "The sulfur release during combustion of six Serbian coals of different rank (from lignite to semi-anthracite) and sulfur content (0.28 - 6.04 %) was determined by analyzing the content of various sulfur forms in coal, char and ash samples. Based on theoretical considerations and behaviour of sulfur compounds during the processes of devolatilization and char combustion, correlations are proposed for estimation of the amount of sulfur released during devolatilization as well as during the overall process of coal combustion. Both correlations take into account the results of the proximate analysis of coal and that of the sulfur forms in the coal, while for the second one the sulfur retention efficiency during char combustion (eta) is needed. The correlations were successfully verified by using the obtained experimental data, as well as the data found in literature. For most of the coals the same value of eta = 0.7 may be used, unless if the molar Ca/S ratio is significantly smaller than 1.",
journal = "Fresenius Environmental Bulletin",
title = "Sulfur release during combustion of Serbian coals",
volume = "12",
number = "11",
pages = "1348-1353",
url = "https://hdl.handle.net/21.15107/rcub_vinar_2689"
}

Manovic, V., Grubor, B., Repić, B., Mladenović, M. R.,& Jovanović, M. P.. (2003). Sulfur release during combustion of Serbian coals. in Fresenius Environmental Bulletin, 12(11), 1348-1353.
https://hdl.handle.net/21.15107/rcub_vinar_2689

Manovic V, Grubor B, Repić B, Mladenović MR, Jovanović MP. Sulfur release during combustion of Serbian coals. in Fresenius Environmental Bulletin. 2003;12(11):1348-1353.
https://hdl.handle.net/21.15107/rcub_vinar_2689 .

Manovic, V, Grubor, Borislav, Repić, Branislav, Mladenović, Milica R., Jovanović, Marina P., "Sulfur release during combustion of Serbian coals" in Fresenius Environmental Bulletin, 12, no. 11 (2003):1348-1353,
https://hdl.handle.net/21.15107/rcub_vinar_2689 .

TY  - JOUR
AU  - Grubor, Borislav
AU  - Manovic, V
AU  - Oka, Simeon N.
PY  - 2003
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/2688
AB  - The process of sulfur self-retention (SSR) occurs as a result of the reactions between the mineral matter in coal ash and the SO2 evolved during coal combustion. Consequently, the emission of SO2 may be significantly reduced. The results of experimental investigations and modeling of SSR is presented in this work. The transformations of sulfur forms during devolatilization are taken into account via a correlation for the amount of sulfur that remains in the char, after devolatilization. A novel approach has been applied for modeling SSR during char combustion, closely related to the grain model used for SO2 retention by limestone as a sorbent. It is assumed that SSR is a result of the reaction between SO2 and CaO in the form of uniformly distributed micro-grains in char. An unreacted shrinking core model is adopted for the reactions between the CaO micro-grains and SO2. The comparison with the experimentally obtained values in a fluidized bed reactor and in a laboratory oven, using coals of different rank (fixed carbon over volatile matter ratio, C-fix/VM = 0.75-7.40), content of sulfur forms (total 0.84-6.04%, organic 0.71-4.71%, pyritic 0-2.57%) and molar Ca/S ratio (0.34-3.17), has shown that the model can adequately predict the kinetics of the process, the levels of the obtained values of SSR efficiencies, as well as the influence of temperature, coal particle size and the surrounding conditions. (C) 2003 Elsevier B.V. All rights reserved.
T2  - Chemical Engineering Journal
T1  - An experimental and modeling study of the contribution of coal ash to SO2 capture in fluidized bed combustion
VL  - 96
IS  - 1-3
SP  - 157
EP  - 169
DO  - 10.1016/j.cej.2003.08.021
ER  - 

@article{
author = "Grubor, Borislav and Manovic, V and Oka, Simeon N.",
year = "2003",
abstract = "The process of sulfur self-retention (SSR) occurs as a result of the reactions between the mineral matter in coal ash and the SO2 evolved during coal combustion. Consequently, the emission of SO2 may be significantly reduced. The results of experimental investigations and modeling of SSR is presented in this work. The transformations of sulfur forms during devolatilization are taken into account via a correlation for the amount of sulfur that remains in the char, after devolatilization. A novel approach has been applied for modeling SSR during char combustion, closely related to the grain model used for SO2 retention by limestone as a sorbent. It is assumed that SSR is a result of the reaction between SO2 and CaO in the form of uniformly distributed micro-grains in char. An unreacted shrinking core model is adopted for the reactions between the CaO micro-grains and SO2. The comparison with the experimentally obtained values in a fluidized bed reactor and in a laboratory oven, using coals of different rank (fixed carbon over volatile matter ratio, C-fix/VM = 0.75-7.40), content of sulfur forms (total 0.84-6.04%, organic 0.71-4.71%, pyritic 0-2.57%) and molar Ca/S ratio (0.34-3.17), has shown that the model can adequately predict the kinetics of the process, the levels of the obtained values of SSR efficiencies, as well as the influence of temperature, coal particle size and the surrounding conditions. (C) 2003 Elsevier B.V. All rights reserved.",
journal = "Chemical Engineering Journal",
title = "An experimental and modeling study of the contribution of coal ash to SO2 capture in fluidized bed combustion",
volume = "96",
number = "1-3",
pages = "157-169",
doi = "10.1016/j.cej.2003.08.021"
}

Grubor, B., Manovic, V.,& Oka, S. N.. (2003). An experimental and modeling study of the contribution of coal ash to SO2 capture in fluidized bed combustion. in Chemical Engineering Journal, 96(1-3), 157-169.
https://doi.org/10.1016/j.cej.2003.08.021

Grubor B, Manovic V, Oka SN. An experimental and modeling study of the contribution of coal ash to SO2 capture in fluidized bed combustion. in Chemical Engineering Journal. 2003;96(1-3):157-169.
doi:10.1016/j.cej.2003.08.021 .

Grubor, Borislav, Manovic, V, Oka, Simeon N., "An experimental and modeling study of the contribution of coal ash to SO2 capture in fluidized bed combustion" in Chemical Engineering Journal, 96, no. 1-3 (2003):157-169,
https://doi.org/10.1016/j.cej.2003.08.021 . .

TY  - JOUR
AU  - Manovic, V
AU  - Grubor, Borislav
AU  - Ilic, M
AU  - Jovancicevic, B
PY  - 2003
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/2622
AB  - An overall model for sulfur self-retention in ash during coal particle combustion is developed in this paper. It is assumed that sulfur retention during char combustion occurs due to the reaction between SO2 and CaO in the form of uniformly distributed non-porous grains. Parametric analysis shows that the process of sulfur self-retention is limited by solid difussion through the non-porous product layer formed on the CaO grains and that the most important coal characteristics which influence sulfur self-retention are coal rank. content of sulfur forms. molar Ca/S ratio and particle radius. A comparison with the experimentally obtained values in a FB reactor showed that die model can adequately predict the kinetics of the process, the levels of the obtained values of the SSR efficiencies, as well as the influence of temperature and coal particle size.
T2  - Journal of the Serbian Chemical Society
T1  - Sulfur retention by ash during coal combustion. Part II. A model of the process
VL  - 68
IS  - 3
SP  - 171
EP  - 182
DO  - 10.2298/JSC0303171M
ER  - 

@article{
author = "Manovic, V and Grubor, Borislav and Ilic, M and Jovancicevic, B",
year = "2003",
abstract = "An overall model for sulfur self-retention in ash during coal particle combustion is developed in this paper. It is assumed that sulfur retention during char combustion occurs due to the reaction between SO2 and CaO in the form of uniformly distributed non-porous grains. Parametric analysis shows that the process of sulfur self-retention is limited by solid difussion through the non-porous product layer formed on the CaO grains and that the most important coal characteristics which influence sulfur self-retention are coal rank. content of sulfur forms. molar Ca/S ratio and particle radius. A comparison with the experimentally obtained values in a FB reactor showed that die model can adequately predict the kinetics of the process, the levels of the obtained values of the SSR efficiencies, as well as the influence of temperature and coal particle size.",
journal = "Journal of the Serbian Chemical Society",
title = "Sulfur retention by ash during coal combustion. Part II. A model of the process",
volume = "68",
number = "3",
pages = "171-182",
doi = "10.2298/JSC0303171M"
}

Manovic, V., Grubor, B., Ilic, M.,& Jovancicevic, B.. (2003). Sulfur retention by ash during coal combustion. Part II. A model of the process. in Journal of the Serbian Chemical Society, 68(3), 171-182.
https://doi.org/10.2298/JSC0303171M

Manovic V, Grubor B, Ilic M, Jovancicevic B. Sulfur retention by ash during coal combustion. Part II. A model of the process. in Journal of the Serbian Chemical Society. 2003;68(3):171-182.
doi:10.2298/JSC0303171M .

Manovic, V, Grubor, Borislav, Ilic, M, Jovancicevic, B, "Sulfur retention by ash during coal combustion. Part II. A model of the process" in Journal of the Serbian Chemical Society, 68, no. 3 (2003):171-182,
https://doi.org/10.2298/JSC0303171M . .

TY  - JOUR
AU  - Ilic, M
AU  - Grubor, Borislav
AU  - Manovic, V
PY  - 2003
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/2618
AB  - A model for the combustion of porous char particles as a basis for modeling the process of sulfur retention by ash dining coal combustion is developed in this paper. The model belongs to the microscopic intrinsic models and describes the dynamic behavior of a porous char particle during comustion, taking into account temporal and spatial changes of all important physical properties of the char particle and various combustion parameters. The The paramettic analysis of the enhanced model shows that the model represents a good basis for the development of a model for the process of sulfur retention by ash during coal combustion. The model enables die prediction of die values of all parameters necessary for the introduction of reactions between sulfur compounds and mineral components in ash. primarily calcium oxide.
T2  - Journal of the Serbian Chemical Society
T1  - Sulfur retention by ash during coal combustion. Part I. A model of char particle combustion
VL  - 68
IS  - 2
SP  - 137
EP  - 145
DO  - 10.2298/JSC0302137I
ER  - 

@article{
author = "Ilic, M and Grubor, Borislav and Manovic, V",
year = "2003",
abstract = "A model for the combustion of porous char particles as a basis for modeling the process of sulfur retention by ash dining coal combustion is developed in this paper. The model belongs to the microscopic intrinsic models and describes the dynamic behavior of a porous char particle during comustion, taking into account temporal and spatial changes of all important physical properties of the char particle and various combustion parameters. The The paramettic analysis of the enhanced model shows that the model represents a good basis for the development of a model for the process of sulfur retention by ash during coal combustion. The model enables die prediction of die values of all parameters necessary for the introduction of reactions between sulfur compounds and mineral components in ash. primarily calcium oxide.",
journal = "Journal of the Serbian Chemical Society",
title = "Sulfur retention by ash during coal combustion. Part I. A model of char particle combustion",
volume = "68",
number = "2",
pages = "137-145",
doi = "10.2298/JSC0302137I"
}

Ilic, M., Grubor, B.,& Manovic, V.. (2003). Sulfur retention by ash during coal combustion. Part I. A model of char particle combustion. in Journal of the Serbian Chemical Society, 68(2), 137-145.
https://doi.org/10.2298/JSC0302137I

Ilic M, Grubor B, Manovic V. Sulfur retention by ash during coal combustion. Part I. A model of char particle combustion. in Journal of the Serbian Chemical Society. 2003;68(2):137-145.
doi:10.2298/JSC0302137I .

Ilic, M, Grubor, Borislav, Manovic, V, "Sulfur retention by ash during coal combustion. Part I. A model of char particle combustion" in Journal of the Serbian Chemical Society, 68, no. 2 (2003):137-145,
https://doi.org/10.2298/JSC0302137I . .

TY  - JOUR
AU  - Grubor, Borislav
AU  - Manovic, V
PY  - 2002
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/2538
AB  - Self-retention Of SO2 by ash of different grades of Kolubara lignite was experimentally investigated in a laboratory furnace. The peculiarity of this type of coal is that in the open pit there are distinct layers of coal and ballast matter, which complicates the formation of representative samples. Two grades of this coal (differing in ballast matter content) were investigated using 3 sieved fractions: 1-1.6 mm, 2.5-3.15 mm, and 4.76-7 mm. It was found that particle size had no significant effect on the sulfur self-retention efficiency (etaSO(2)). The effect of ballast matter content on etaSO(2) was investigated by classifying two sieved fractions into classes with different density ranging from LT 1000 kg/m(3) to GT 1600 kg/m(3). It was found that most of sulfur self-retention occurs in less dense particles., For this coal only 60% of the total calcium was found to be active in relation to sulfur self-retention capability. Most of the active calcium and sulfur were found to be present in particles of lower density, which explains their dominant contribution to overall sulfur self-retention.
T2  - Energy and Fuels
T1  - Influence of non-uniformity of coal and distribution of active calcium on sulfur self-retention by ash - A case study of lignite Kolubara
VL  - 16
IS  - 4
SP  - 951
EP  - 955
DO  - 10.1021/ef0200119
ER  - 

@article{
author = "Grubor, Borislav and Manovic, V",
year = "2002",
abstract = "Self-retention Of SO2 by ash of different grades of Kolubara lignite was experimentally investigated in a laboratory furnace. The peculiarity of this type of coal is that in the open pit there are distinct layers of coal and ballast matter, which complicates the formation of representative samples. Two grades of this coal (differing in ballast matter content) were investigated using 3 sieved fractions: 1-1.6 mm, 2.5-3.15 mm, and 4.76-7 mm. It was found that particle size had no significant effect on the sulfur self-retention efficiency (etaSO(2)). The effect of ballast matter content on etaSO(2) was investigated by classifying two sieved fractions into classes with different density ranging from LT 1000 kg/m(3) to GT 1600 kg/m(3). It was found that most of sulfur self-retention occurs in less dense particles., For this coal only 60% of the total calcium was found to be active in relation to sulfur self-retention capability. Most of the active calcium and sulfur were found to be present in particles of lower density, which explains their dominant contribution to overall sulfur self-retention.",
journal = "Energy and Fuels",
title = "Influence of non-uniformity of coal and distribution of active calcium on sulfur self-retention by ash - A case study of lignite Kolubara",
volume = "16",
number = "4",
pages = "951-955",
doi = "10.1021/ef0200119"
}

Grubor, B.,& Manovic, V.. (2002). Influence of non-uniformity of coal and distribution of active calcium on sulfur self-retention by ash - A case study of lignite Kolubara. in Energy and Fuels, 16(4), 951-955.
https://doi.org/10.1021/ef0200119

Grubor B, Manovic V. Influence of non-uniformity of coal and distribution of active calcium on sulfur self-retention by ash - A case study of lignite Kolubara. in Energy and Fuels. 2002;16(4):951-955.
doi:10.1021/ef0200119 .

Grubor, Borislav, Manovic, V, "Influence of non-uniformity of coal and distribution of active calcium on sulfur self-retention by ash - A case study of lignite Kolubara" in Energy and Fuels, 16, no. 4 (2002):951-955,
https://doi.org/10.1021/ef0200119 . .