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Permanent link (DOI): https://doi.org/10.7939/R3K352

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The Role of Sulfur during the Cracking of n-Hexadecane and Cold Lake Bitumen with alpha-Fe2O3 and Steam Open Access

Descriptions

Other title
Subject/Keyword
Coke
Alpha-Fe2O3
Hexadecane
Liquid phase cracking
Cold Lake Bitumen
Steam
Type of item
Thesis
Degree grantor
University of Alberta
Author or creator
Olson, Blake J
Supervisor and department
De Klerk, Arno (Chemical and Materials Engineering)
McCaffrey, William (Chemical and Materials Engineering)
Examining committee member and department
Stryker, Jeffrey (Chemistry)
Department
Department of Chemical and Materials Engineering
Specialization
Chemical Engineering
Date accepted
2013-01-29T14:08:37Z
Graduation date
2013-06
Degree
Master of Science
Degree level
Master's
Abstract
Coke produced during bitumen upgrading has a high heteroatom content and low economic value. To improve feed efficiency, cracking of hexadecane and bitumen with α-Fe2O3 and water has been studied to decrease coke yield, while increasing sulfur content. Compared to thermal cracking, catalytic cracking of hexadecane with α-Fe2O3 increased the conversion by 11.8% overall. By adding steam, however, the conversion decreased by 5.9%, due to competitive adsorption. The reaction of H2S with α-Fe2O3 was also inhibited by steam that competed for active sites and even oxidized the produced iron sulfides. Conversely, during bitumen cracking, α-Fe2O3 did not affect the coke yield due to fouling of the surface, but did increase the sulfur content of the solid product. On the other hand, the addition of water not only decreased the coke yield by ~3%, but also inhibited the reaction of H2S, indicating that competitive adsorption was still occurring after fouling.
Language
English
DOI
doi:10.7939/R3K352
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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