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Permanent link (DOI): https://doi.org/10.7939/R37D2QG1C

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Platinum-palladium catalysts for methane-fuelled heaters Open Access

Descriptions

Other title
Subject/Keyword
Methane combustion
Platinum
Impregnation
Heater
Catalyast
Palladium
Type of item
Thesis
Degree grantor
University of Alberta
Author or creator
Wu, Xiaoxing
Supervisor and department
Hayes, Robert E. (Chemical and Materials Engineering)
Semagina, Natalia (Chemical and Materials Engineering)
Examining committee member and department
Hayes, Robert E. (Chemical and Materials Engineering)
Nazemifard, Neda (Chemical and Materials Engineering)
Liu, Jinfeng (Chemical and Materials Engineering)
Semagina, Natalia (Chemical and Materials Engineering)
Department
Department of Chemical and Materials Engineering
Specialization
Chemical Engineering
Date accepted
2015-09-28T09:20:14Z
Graduation date
2015-11
Degree
Master of Science
Degree level
Master's
Abstract
Natural-gas fuelled catalytic heaters are commonly used in heating industrial space and remote location operations. Industrial units typically contain platinum that provides methane combustion at lower temperatures than non-catalytic burning. This work aimed to find a cost-efficient alternative to monometallic platinum catalyst by replacing some of platinum with less expensive palladium, which is also known for methane combustion activity. The task is complicated by non-uniform reactant profiles across the catalytic pad. Several Pd:Pt bimetallic catalysts were prepared by dry impregnation of commercial pads with metal precursors and tested in methane combustion with 5% water presence at two different methane-to-oxygen molar ratios (0.2 and 0.02). Pt1.6Pd catalyst (molar ratio) is recommended to replace monometallic platinum: it provides higher activity than monometallic Pt catalyst at 0.02 CH4-to-O2 ratio. At the 0.2 ratio, its activity is lower than that of Pt, but is sufficient for adequate heater operation.
Language
English
DOI
doi:10.7939/R37D2QG1C
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. 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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