TY  - JOUR
AU  - Jankes, Goran
AU  - Cvetković, Olga
AU  - Milovanovic, Nebojsa
AU  - Ercegovac, Marko
AU  - Adžić, Miroljub
AU  - Stamenic, Mirjana
PY  - 2009
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/528
AB  - Soft brown coals of the open coal fields of Kolubara and Kostolac are the main domestic energy sources of Serbia. This paper presents the results of investigations on rapid devolatilization of these two coals which have covered kinetics of devolatilization (based on total volatile yield), forms of sulphur and petrographic analysis of coal and char. Experiments of devolatilization were performed in inert gas (N2) at atmospheric pressure and in batch-type hot-wire screen reactor. The mass-loss values of both coals at selected final reaction temperatures (300-900°C) and retention times (3-28 s) were obtained. Anthony and Howard's kinetic model was applied over two temperature ranges (300-500 and 700-900°C). The types of sulphur as monosulphide, sulphate, pyritic, and organic sulphur were determined for chars and original coals. Strong transformation of pyrite was evident even at low temperatures (300°C). Devolatilization of all types of sulphur has started over 600 and at 900°C the content of sulphur in char remained only 66% of total sulphur in original coal. Microscopic investigations were carried out on samples prepared for reflected light measurements. The petrographic analysis included: the ratio of unchanged and changed coal, maceral types, the share of cenosferes, isotropic mixed carbonized grains, mixed grains, small fragments, clay, and pyrite. The change of the structure of devolatilized coal was also observed.
PB  - VINCA Institute of Nuclear Sciences
T2  - Thermal Science
T1  - Rapid pyrolysis of Serbian soft brown coals
VL  - 13
IS  - 1
SP  - 113
EP  - 125
DO  - 10.2298/TSCI0901113J
ER  - 

@article{
author = "Jankes, Goran and Cvetković, Olga and Milovanovic, Nebojsa and Ercegovac, Marko and Adžić, Miroljub and Stamenic, Mirjana",
year = "2009",
abstract = "Soft brown coals of the open coal fields of Kolubara and Kostolac are the main domestic energy sources of Serbia. This paper presents the results of investigations on rapid devolatilization of these two coals which have covered kinetics of devolatilization (based on total volatile yield), forms of sulphur and petrographic analysis of coal and char. Experiments of devolatilization were performed in inert gas (N2) at atmospheric pressure and in batch-type hot-wire screen reactor. The mass-loss values of both coals at selected final reaction temperatures (300-900°C) and retention times (3-28 s) were obtained. Anthony and Howard's kinetic model was applied over two temperature ranges (300-500 and 700-900°C). The types of sulphur as monosulphide, sulphate, pyritic, and organic sulphur were determined for chars and original coals. Strong transformation of pyrite was evident even at low temperatures (300°C). Devolatilization of all types of sulphur has started over 600 and at 900°C the content of sulphur in char remained only 66% of total sulphur in original coal. Microscopic investigations were carried out on samples prepared for reflected light measurements. The petrographic analysis included: the ratio of unchanged and changed coal, maceral types, the share of cenosferes, isotropic mixed carbonized grains, mixed grains, small fragments, clay, and pyrite. The change of the structure of devolatilized coal was also observed.",
publisher = "VINCA Institute of Nuclear Sciences",
journal = "Thermal Science",
title = "Rapid pyrolysis of Serbian soft brown coals",
volume = "13",
number = "1",
pages = "113-125",
doi = "10.2298/TSCI0901113J"
}

Jankes, G., Cvetković, O., Milovanovic, N., Ercegovac, M., Adžić, M.,& Stamenic, M.. (2009). Rapid pyrolysis of Serbian soft brown coals. in Thermal Science
VINCA Institute of Nuclear Sciences., 13(1), 113-125.
https://doi.org/10.2298/TSCI0901113J

Jankes G, Cvetković O, Milovanovic N, Ercegovac M, Adžić M, Stamenic M. Rapid pyrolysis of Serbian soft brown coals. in Thermal Science. 2009;13(1):113-125.
doi:10.2298/TSCI0901113J .

Jankes, Goran, Cvetković, Olga, Milovanovic, Nebojsa, Ercegovac, Marko, Adžić, Miroljub, Stamenic, Mirjana, "Rapid pyrolysis of Serbian soft brown coals" in Thermal Science, 13, no. 1 (2009):113-125,
https://doi.org/10.2298/TSCI0901113J . .