ELEMENTAL COMPOSITION OF ASPHALTENES FROM COAL LIQUEFACTION
作者:
I. de Marco,
V. Rodriguez,
M.J. Chomon,
A. Torres,
期刊:
Fuel Science and Technology International
(Taylor Available online 1995)
卷期:
Volume 13,
issue 10
页码: 1345-1353
ISSN:0884-3759
年代: 1995
DOI:10.1080/08843759508947741
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
The elemental composition (C, H, N, S, O) of asphaltenes isolated from coal liquefaction experiments carried out at different temperatures and tetralin/coal ratios has been determined. The liquefaction experiments were conducted in a 250 ml autoclave, with 10 g of a Spanish subbituminous A coal, for 1 hour, and at 17 ± 1 MPa operating pressure and 400 rpm stirring speed. The liquefaction products were fractionated into oils, asphaltenes and preasphaltenes using pentane, toluene and THF as extractive solvents. The % S and % O are lower in asphaltenes than in coal, while the % C and % N are higher and % H depends on the temperature and tetralin/coal ratio used. On the other hand asphaltenes % C decreases, and % H and % O increase as the tetralin/coal ratio is raised at every temperature except 475 °C, while % S and % N do not have a clear variation.
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