STUDIES ON STEPWISE COAL CONVERSION
作者:
D.K. Sharma,
S.K. Singh,
期刊:
Fuel Science and Technology International
(Taylor Available online 1995)
卷期:
Volume 13,
issue 9
页码: 1185-1198
ISSN:0884-3759
年代: 1995
DOI:10.1080/08843759508947731
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
A two step process of organorefining (successive solvolytic extractions) using anthracene oi1-ethylenediamine-liquid paraffin followed by steam carbonization of coal afforded clean fuels from coal with higher heating values. Effect of heating rate and final temperature of pyrolysis on the pyrolysis of residual coal obtained after organorefining was studied. More than 60% coal was recovered as clean fuels by this process. Pretreatments such as reduction, depolymerization and reductive-depolymerization enhance the devoiati1ization yield through steam pyrolysis. The use of steam in pyrolysis inhibited condensation reactions and promoted the cracking of phenolic and condensed polycyclic aromatic ring structures. Dynamics of the two stage process has been studied. The observation that coal consists of 5 different types of molecules has been supported by the evidence. Behaviour of different types of coal molecules in the stepwise coal conversion is explained. Successive extraction by selected solvents followed by pyrolysis of residual coal obtained can be a useful technique for the studies of organic chemical structure of coal.
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