Possibility of Increased Oil Yield in the NEDOL Process

Autor:	Kenji Inokuchi, Toshimitsu Suzuki, Masumi Itonaga, Mochizuki Michiharu, and Shouichi Ibaragi, Sadao Wasaka, Hirokazu Oda and, Kouji Sakawaki and
Rok vydání:	2002
Předmět:	business.industry General Chemical Engineering Energy Engineering and Power Technology Liquefaction Coal liquefaction Toluene Hexane Residue (chemistry) chemistry.chemical_compound Fuel Technology chemistry Chemical engineering Organic chemistry Coal business Hydrodesulfurization Asphaltene
Zdroj:	Energy & Fuels. 17:172-178
ISSN:	1520-5029 0887-0624
DOI:	10.1021/ef020085k
Popis:	A maximum oil yield in the NEDOL coal liquefaction process was obtained with coal containing 76−78% carbon, while gas and water yields decreased with an increase in the carbon content. On the other hand, residue yield increased with an increase in the carbon content and this was attributed to an increase in asphaltene [(hexane insoluble)−(toluene soluble)] in the residue. From the experimental results, it was inferred that decomposition of the asphaltene is inevitable for improvement of the oil yield and that prolonged residence time in the liquefaction reactors is the most effective and practical measure for decomposing the asphaltene under the operating conditions of the NEDOL process. The average structure of the hexane soluble, asphaltene and preasphaltene [(toluene insoluble)−(THF soluble)] in the liquefaction residue exhibited the similar structural parameters in coals tested in the NEDOL coal liquefaction plants. The asphaltene fraction was then extracted from the residue by commercially applicable...
Databáze:	OpenAIRE
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