TY  - JOUR
AU  - Aleksić, Bogdan R.
AU  - Ercegovac, Marko D.
AU  - Cvetković, Olga
AU  - Marković, Branislav Ž.
AU  - Aleksić, Bojana D.
AU  - Vitorović, Dragomir
PY  - 1998
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/5858
AB  - The behaviour of the soft brown coal from the Kostolac Mine (Serbia, Yugoslavia) was investigated during hydroliquefaction carried out in a batch reactor by direct catalytic hydrogenation of the pulverized coal (- 160 μm) dispersed in tetralin. The effects of temperature (ranging from 365 to 440°C), pressure (13.5 to 15.0 MPa) and residence time (1 to 8 h) on the yield of individual liquefaction products as well as the petrographic composition of the coal residues were closely followed by separation and analysis of the products. These consisted of liquid products soluble in n-heptane (light oils), n-heptane insoluble products (asphaltenes), the solid coal residue and gaseous products. A good reactivity of this soft brown coal was observed. The yield of liquid products varied from 23 to 64 wt.% (based on dry ash-free coal). A total coal conversion of 80 to 86% was achieved. Petrographic composition and optical properties of the solid coal residues were analyzed microscopically in order to establish the character and intensity of the coal changes. The solid residues were found to consist of 12 various grain categories. The low proportions of unreacted or partly reacted coal grains confirmed the good reactivity of the Kostolac soft brown coal in the applied liquefaction process.
PB  - Elsevier B.V.
T2  - Fuel Processing Technology
T1  - Direct hydroliquefaction of a low rank soft brown coal
VL  - 58
IS  - 1
SP  - 33
SP  - 43
DO  - 10.1016/S0378-3820(98)00079-4
ER  - 

@article{
author = "Aleksić, Bogdan R. and Ercegovac, Marko D. and Cvetković, Olga and Marković, Branislav Ž. and Aleksić, Bojana D. and Vitorović, Dragomir",
year = "1998",
abstract = "The behaviour of the soft brown coal from the Kostolac Mine (Serbia, Yugoslavia) was investigated during hydroliquefaction carried out in a batch reactor by direct catalytic hydrogenation of the pulverized coal (- 160 μm) dispersed in tetralin. The effects of temperature (ranging from 365 to 440°C), pressure (13.5 to 15.0 MPa) and residence time (1 to 8 h) on the yield of individual liquefaction products as well as the petrographic composition of the coal residues were closely followed by separation and analysis of the products. These consisted of liquid products soluble in n-heptane (light oils), n-heptane insoluble products (asphaltenes), the solid coal residue and gaseous products. A good reactivity of this soft brown coal was observed. The yield of liquid products varied from 23 to 64 wt.% (based on dry ash-free coal). A total coal conversion of 80 to 86% was achieved. Petrographic composition and optical properties of the solid coal residues were analyzed microscopically in order to establish the character and intensity of the coal changes. The solid residues were found to consist of 12 various grain categories. The low proportions of unreacted or partly reacted coal grains confirmed the good reactivity of the Kostolac soft brown coal in the applied liquefaction process.",
publisher = "Elsevier B.V.",
journal = "Fuel Processing Technology",
title = "Direct hydroliquefaction of a low rank soft brown coal",
volume = "58",
number = "1",
pages = "33-43",
doi = "10.1016/S0378-3820(98)00079-4"
}

Aleksić, B. R., Ercegovac, M. D., Cvetković, O., Marković, B. Ž., Aleksić, B. D.,& Vitorović, D.. (1998). Direct hydroliquefaction of a low rank soft brown coal. in Fuel Processing Technology
Elsevier B.V.., 58(1), 33.
https://doi.org/10.1016/S0378-3820(98)00079-4

Aleksić BR, Ercegovac MD, Cvetković O, Marković BŽ, Aleksić BD, Vitorović D. Direct hydroliquefaction of a low rank soft brown coal. in Fuel Processing Technology. 1998;58(1):33.
doi:10.1016/S0378-3820(98)00079-4 .

Aleksić, Bogdan R., Ercegovac, Marko D., Cvetković, Olga, Marković, Branislav Ž., Aleksić, Bojana D., Vitorović, Dragomir, "Direct hydroliquefaction of a low rank soft brown coal" in Fuel Processing Technology, 58, no. 1 (1998):33,
https://doi.org/10.1016/S0378-3820(98)00079-4 . .

TY  - JOUR
AU  - Vitorović, Dragomir
AU  - Aleksić, Bogdan R.
AU  - Ercegovac, Marko
AU  - Aleksić, Bojana D.
AU  - Kontorovič, Svetlana I.
AU  - Marković, Branislav Ž.
AU  - Cvetković, Olga
AU  - Mitrovski, Svetlana M.
PY  - 1994
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/5859
AB  - The behaviour of Kolubara soft brown coal during direct liquefaction by catalytic hydrogenation was studied and was compared with the Banovići brown coal investigated previously. A sample of washed and dried coal was ground dry, or was ground in the presence of different liquids. Addition of water during grinding resulted in a somewhat coarser granular composition, while n-heptane did not have a noticeable effect. High reactivity of the soft brown coal, which initially was indicated by thermal analysis, was confirmed by high yields of liquid products, particularly of oils soluble in n-heptane. The solid liquefaction residues did not contain pyrolytic carbon and cenospheres, and contained a low proportion of humoplasts indicating the high liquefaction efficiency of the coal in spite of its high content of xylite.
PB  - Elsevier B.V.
T2  - Fuel
T1  - Liquefaction behaviour of Kolubara soft brown coal
VL  - 73
IS  - 11
SP  - 1757
EP  - 1765
DO  - 10.1016/0016-2361(94)90164-3
ER  - 

@article{
author = "Vitorović, Dragomir and Aleksić, Bogdan R. and Ercegovac, Marko and Aleksić, Bojana D. and Kontorovič, Svetlana I. and Marković, Branislav Ž. and Cvetković, Olga and Mitrovski, Svetlana M.",
year = "1994",
abstract = "The behaviour of Kolubara soft brown coal during direct liquefaction by catalytic hydrogenation was studied and was compared with the Banovići brown coal investigated previously. A sample of washed and dried coal was ground dry, or was ground in the presence of different liquids. Addition of water during grinding resulted in a somewhat coarser granular composition, while n-heptane did not have a noticeable effect. High reactivity of the soft brown coal, which initially was indicated by thermal analysis, was confirmed by high yields of liquid products, particularly of oils soluble in n-heptane. The solid liquefaction residues did not contain pyrolytic carbon and cenospheres, and contained a low proportion of humoplasts indicating the high liquefaction efficiency of the coal in spite of its high content of xylite.",
publisher = "Elsevier B.V.",
journal = "Fuel",
title = "Liquefaction behaviour of Kolubara soft brown coal",
volume = "73",
number = "11",
pages = "1757-1765",
doi = "10.1016/0016-2361(94)90164-3"
}

Vitorović, D., Aleksić, B. R., Ercegovac, M., Aleksić, B. D., Kontorovič, S. I., Marković, B. Ž., Cvetković, O.,& Mitrovski, S. M.. (1994). Liquefaction behaviour of Kolubara soft brown coal. in Fuel
Elsevier B.V.., 73(11), 1757-1765.
https://doi.org/10.1016/0016-2361(94)90164-3

Vitorović D, Aleksić BR, Ercegovac M, Aleksić BD, Kontorovič SI, Marković BŽ, Cvetković O, Mitrovski SM. Liquefaction behaviour of Kolubara soft brown coal. in Fuel. 1994;73(11):1757-1765.
doi:10.1016/0016-2361(94)90164-3 .

Vitorović, Dragomir, Aleksić, Bogdan R., Ercegovac, Marko, Aleksić, Bojana D., Kontorovič, Svetlana I., Marković, Branislav Ž., Cvetković, Olga, Mitrovski, Svetlana M., "Liquefaction behaviour of Kolubara soft brown coal" in Fuel, 73, no. 11 (1994):1757-1765,
https://doi.org/10.1016/0016-2361(94)90164-3 . .