@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"
}