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Permanent link (DOI): https://doi.org/10.7939/R31N7XW1P

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Investigation of solvent extraction of coal at low temperatures Open Access

Descriptions

Other title
Subject/Keyword
Coal
Solvent Extraction
Type of item
Thesis
Degree grantor
University of Alberta
Author or creator
Haghighat,Fatemehalsadat
Supervisor and department
De Klerk, Arno (Chemical and materials engineering)
Examining committee member and department
Gupta, Rajender (Chemical and materials engineering)
Prasad, Vinay (Chemical and materials engineering)
Department
Department of Chemical and Materials Engineering
Specialization
Chemical Engineering
Date accepted
2013-09-26T13:34:51Z
Graduation date
2013-11
Degree
Master of Science
Degree level
Master's
Abstract
Solvent extraction of coal is a method to produce low molecular weight products from coal. It also can be used as a pretreatment for Direct Coal Liquefaction to enhance its efficiency. Yield, rate and nature of coal dissolution at low temperatures (25-150°C) and short contact time have been studied, using a flow micro-reactor. The results show it can be done in less than 15 minutes and the yield is about 7-9%, depending on the temperature. Also it has been observed the solvent to coal ratio has no significant effect on yield as it increases. Extraction of Poplar coal with tetralin at 150°C enhances the porosity of the coal. This knowledge about low temperature extraction was applied to liquefaction at 350°C by performing preheating in different ways. The yield increased as the mean temperature of the temperature profile during preheating was increased.
Language
English
DOI
doi:10.7939/R31N7XW1P
Rights
Permission is hereby granted to the University of Alberta Libraries to reproduce single copies of this thesis and to lend or sell such copies for private, scholarly or scientific research purposes only. Where the thesis is converted to, or otherwise made available in digital form, the University of Alberta will advise potential users of the thesis of these terms. The author reserves all other publication and other rights in association with the copyright in the thesis and, except as herein before provided, neither the thesis nor any substantial portion thereof may be printed or otherwise reproduced in any material form whatsoever without the author's prior written permission.
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