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Distributed Activation Energies Modeling of Athabasca Vacuum Residue Pyrolysis Open Access

Descriptions

Other title
Subject/Keyword
Pyrolysis
Athabasca Vacuum Residue
Activation Energy
Type of item
Thesis
Degree grantor
University of Alberta
Author or creator
Ghafelebashi Zarand, Sayid Mohammad
Supervisor and department
McCaffrey, William C. (Department of Chemical and Materials Engineering)
Examining committee member and department
Kuznicki, Steven M. (Department of Chemical and Materials Engineering)
Yeung, Tony (Department of Chemical and Materials Engineering)
Department
Department of Chemical and Materials Engineering
Specialization
Chemical Engineering
Date accepted
2013-11-20T09:49:18Z
Graduation date
2014-06
Degree
Master of Science
Degree level
Master's
Abstract
The kinetics of the thermal decomposition of Athabasca vacuum residue (AVR) has been studied by thermogravimetric analysis. Three heating rates of 0.5, 10 and 25 K/min were used to investigate the consistency of kinetic parameters. The Weibull and Gaussian distribution functions were found to be the best distribution functions for fitting the curve of differential of conversion with respect to time. The effect of pre-oxidation at low temperature with and without goethite α-FeO(OH) as a catalyst for oxidation was investigated in closed reactor. A three lump reaction network modeled the thermal cracking and the kinetics of AVR. Based on the obtained activation energies, it was found that goethite has a negligible effect as a catalyst during pre-oxidation. The difference among the calculated activation energies indicated that pre-oxidation resulted in the polymerization the vacuum residue molecules, The resulting pre-oxidized material was subsequently more resistant to thermal cracking than the unreacted feed.
Language
English
DOI
doi:10.7939/R3PQ3F
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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