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DISSOLUTION OF COALS NEAR CRITICAL CONDITIONS

 

作者: Dursun PEHLlVAN,   Melek GÜRKAHRAMAN,   Vecihi PAMUK,  

 

期刊: Fuel Science and Technology International  (Taylor Available online 1996)
卷期: Volume 14, issue 7  

页码: 925-937

 

ISSN:0884-3759

 

年代: 1996

 

DOI:10.1080/08843759608947621

 

出版商: Taylor & Francis Group

 

数据来源: Taylor

 

摘要:

Two lignites and one bituminous coal were extracted with benzene, toluene and pyridine at both sub and overcritical conditions in a specially designed experimental system which enabled easy solid-liquid separation. Extract yields increased somewhat at overcritical conditions due to more thermal decomposition. The differences between the power of the solvents were not apparent for the lignites, whereas the solubility in pyridine of the bituminous coal was very much higher than those in benzene and toluene. The amounts of oils, asphaltenes and preasphaltenes in the extracts depended on the type of coal and the solvent.

 

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