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Permanent link (DOI): https://doi.org/10.7939/R3CH6Q

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Characterization of the dissolved organic matter in steam assisted gravity drainage boiler blow-down water Open Access

Descriptions

Other title
Subject/Keyword
Naphthenic acids
Fluorescence characterization
SAGD boiler blow-down
dissolved organic matter
Type of item
Thesis
Degree grantor
University of Alberta
Author or creator
Guha Thakurta, Subhayan
Supervisor and department
Bhattacharjee, Subir (Mechanical Engineering)
Examining committee member and department
Mitra, Sushanta (Mechanical Engineering)
Thundat, Thomas (Chemical and Materials Engineering)
Department
Department of Mechanical Engineering
Specialization

Date accepted
2012-07-25T14:08:56Z
Graduation date
2012-11
Degree
Master of Science
Degree level
Master's
Abstract
The presence of high concentrations of dissolved organic matter (DOM) and total dissolved solids (TDS) in the boiler blow-down water (BBD) causes severe equipment fouling during the SAGD operation. For effective BBD management, a detailed understanding of the BBD chemistry is important. In this work, BBD DOM was fractionated using ion-exchange resins into hydrophobic and hydrophilic acids, bases and neutral fractions. Fluorescence excitation emission contours established discerning signatures of the organic fractions. The molecular weight distribution of the DOM was determined through filtration of BBD using membranes of different molecular weight cut-offs (MWCO). The effect of acidification on the BBD DOM and the mechanism of silica-DOM co-precipitation in presence of high salt concentration was determined. The DOM consisted mostly of low molecular weight compounds. Hydrophobic acids present in the BBD were predominantly humic acids and not naphthenic acids as observed in oilsands process affected waters.
Language
English
DOI
doi:10.7939/R3CH6Q
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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