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Permanent link (DOI): https://doi.org/10.7939/R3SB3XB1Q

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Pressure Filtration of Oil Sands Mature Fine Tailings Open Access

Descriptions

Other title
Subject/Keyword
Micro Computed Tomography
Flocculation
Filtration
Kaolinite
Polymer
Bitumen
Mature Fine Tailings
Type of item
Thesis
Degree grantor
University of Alberta
Author or creator
Loerke, Rosalynn S.
Supervisor and department
Liu, Qi (Chemical and Materials Engineering)
Examining committee member and department
Liu, Qi (Chemical and Materials Engineering)
Nikrityuk, Petr (Chemical and Materials Engineering)
Lefsrud, Lianne (Chemical and Materials Engineering)
Department
Department of Chemical and Materials Engineering
Specialization
Chemical Engineering
Date accepted
2016-12-19T14:26:50Z
Graduation date
2017-06:Spring 2017
Degree
Master of Science
Degree level
Master's
Abstract
Dewatering of the oil sands mature fine tailings (MFT) is studied through pressure filtration following treatment by dual polymer flocculants. Polymer pairs consisting of anionic polyacrylamide (A3335) and cationic polyDADMAC (Alcomer 7115), and A3335 and non-ionic polyethylene oxide (PEO) are tested. The effect of the residual bitumen in MFT on dewaterability and filtration is also assessed. Ideal clay systems of kaolinite are compared against kaolinite slurries homogenized with bitumen at the same concentration that exists in the MFT. The dual polymer treatment of MFT is found to be more efficient than the single polymer treatment in terms of shorter capillary suction times (CST), higher filter cake solids content, higher net water release (NWR), faster water release rate, and lower specific resistance to filtration (SRF). Additionally, it is found that the addition of bitumen to pure kaolinite decreases filterability performance, but the kaolinite/bitumen mixture had comparable filterability to dual polymer flocculated MFT if treated with the same dosage of the dual polymers. The porosity of the filter cakes are assessed with micro computed tomography (micro-CT). It is found that the porosity correlates well with solids content data and that pore connectivity increases with dual polymer treatment.
Language
English
DOI
doi:10.7939/R3SB3XB1Q
Rights
This thesis is made available by the University of Alberta Libraries with permission of the copyright owner solely for the purpose of private, scholarly or scientific research. This thesis, or any portion thereof, may not otherwise be copied or reproduced without the written consent of the copyright owner, except to the extent permitted by Canadian copyright law.
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