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Permanent link (DOI): https://doi.org/10.7939/R3QR4NZ8R

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Thermal Analysis and Pyrolysis Pathways of Coal-Related Ether Compounds Open Access

Descriptions

Other title
Subject/Keyword
Ether bond
Coal liquefaction
Thermolysis
Differential scanning calorimetry
Type of item
Thesis
Degree grantor
University of Alberta
Author or creator
Wei, Wei
Supervisor and department
de Klerk, Arno (Chemical and Materials Engineering)
Gupta, Rajender (Chemical and Materials Engineering)
Examining committee member and department
Prasad, Vinay (Chemical and Materials Engineering)
de Klerk, Arno (Chemical and Materials Engineering)
Gupta, Rajender (Chemical and Materials Engineering)
Department
Department of Chemical and Materials Engineering
Specialization
Chemical Engineering
Date accepted
2013-11-12T11:04:28Z
Graduation date
2014-06
Degree
Master of Science
Degree level
Master's
Abstract
The stability of the ether bond affects coal dissolution during direct coal liquefaction and aliphatic ethers are reportedly the most reactive of the oxygenate classes during liquefaction. Some ether compounds are also persistent to high temperature during coal pyrolysis. The thermolysis of ether compounds using high-pressure differential scanning calorimetry (HPDSC) were performed to study the thermal decomposition of aliphatic and aromatic ethers. These results showed that the melting point of each ether sample is quite accurate compared to the literature data, and the high temperature decomposition could be determined. GC-MS results indicated that the ether compounds decomposed to a number of smaller and larger organic molecules. The detailed reaction pathways of the model ether compounds on their own and in the presence of a hydrogen-donor solvent were studied. These results help us to understand the role of autothermolysis of ethers versus induced thermolysis of ethers during coal liquefaction.
Language
English
DOI
doi:10.7939/R3QR4NZ8R
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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