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Permanent link (DOI): https://doi.org/10.7939/R3ZX2M

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Extraction of bitumen from Athabasca oil sand slurry using supercritical carbon Dioxide Open Access

Descriptions

Other title
Subject/Keyword
Supercritical fluid extraction
Bitumen
Athabasca oil sand
Slurry extraction
Supercritical carbon dioxide extraction
Type of item
Thesis
Degree grantor
University of Alberta
Author or creator
La, Helen
Supervisor and department
Guigard, Selma (Department of Civil and Environmental Engineering)
Examining committee member and department
Hashisho, Zaher (Department of Civil and Environmental Engineering)
Saldaña, Marleny D.A. (Department of Agriculture, Food and Nutritional Sciences)
Department
Department of Civil and Environmental Engineering
Specialization

Date accepted
2011-04-14T22:18:41Z
Graduation date
2011-06
Degree
Master of Science
Degree level
Master's
Abstract
Extraction of hydrocarbons from an Athabasca oil sand slurry were conducted using supercritical carbon dioxide (SC-CO2). The oil sand was slurried to a 1:1 ratio with water and experiments were conducted using a laboratory-scale batch supercritical fluid extraction (SFE) system. Preliminary tests revealed the importance of mixing rate on hydrocarbon yields. A 2^3 factorial experiment was then conducted to test the effect of temperature, pressure, and modifier (toluene) addition on hydrocarbon extraction yield. When toluene was absent, hydrocarbon extraction yields were greater at the high temperature (60°C); however, when toluene was present, the combination of low temperature (31°C) and high pressure (24.1MPa) provided greater extraction yields. The experiment that produced the highest cumulative hydrocarbon extraction yield was analyzed by GC-FID for product-quality. Two composite samples and one time series sample revealed a carbon distribution range of the extract centering on C25, corresponding to the light gas oil range as classified in petroleum fractions.
Language
English
DOI
doi:10.7939/R3ZX2M
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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