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Permanent link (DOI): https://doi.org/10.7939/R36D0V

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Chromatographic separation of asphaltenes on silica materials Open Access

Descriptions

Other title
Subject/Keyword
asphaltenes
adsorption
chromatography
fluorescence
silica materials
Type of item
Thesis
Degree grantor
University of Alberta
Author or creator
Razavilar, Negin
Supervisor and department
Murray R.Gray, Chemical and Materials Engineering
Steven M.Kuznicki, Chemical and Materials Engineering
Examining committee member and department
Mark McDermott, Chemistry, University of Alberta
Department
Department of Chemical and Materials Engineering
Specialization

Date accepted
2009-10-01T20:35:38Z
Graduation date
2009-11
Degree
Master of Science
Degree level
Master's
Abstract
In this study, we describe the use of different silica materials to separate vanadium compounds from Asphaltenes. We used high performance flash chromatography separation method to separate asphaltenes at different solvent strengths on sea sand. The separation conditions were optimized for flow rate and the strength of the solvent. The selectivity of separation was determined based on asphaltene and metal recovery. With separation on sea sand as the solvent strength increased, the recovery percentage of the asphaltenes also increased. Similarly, stronger solvent blends give poor selectivity based on peak shifts in fluorescence spectra. The separation conditions were then used to compare the performance of a series of silica materials treated with alkaline earth metals. These samples were treated with the same molar concentration of reactant at the same temperature. Treatment of silica materials resulted in an increase in metals recovery and asphaltene recovery by providing less active sites for adsorption.
Language
English
DOI
doi:10.7939/R36D0V
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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