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Permanent link (DOI): https://doi.org/10.7939/R3J59Z

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Gas Separation Membranes Using Cementitious-Zeolite Composite Open Access

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Other title
Subject/Keyword
gas separation
natural zeolite
membrane
Type of item
Thesis
Degree grantor
University of Alberta
Author or creator
Shafie, Amir Hossein
Supervisor and department
Kuznicki, Steven M. (Chemical and Materials Engineering)
Examining committee member and department
Lubell, Adam (Civil and Environmental Engineering)
Dechaine, Greg (Chemical and Materials Engineering)
Unsworth, Larry D. (Chemical and Materials Engineering)
Department
Department of Chemical and Materials Engineering
Specialization

Date accepted
2011-11-04T21:18:25Z
Graduation date
2012-06
Degree
Master of Science
Degree level
Master's
Abstract
Natural zeolite-based membranes have recently shown promise in the separation of H2 from CO2 and hydrocarbons. However, these highly dense, naturally monolithic materials can suffer defects which disrupt the continuity of the zeolite micropores and create leak paths through the membrane. Cement materials were explored as a component to generate mixed-matrix zeolite membranes. The ability for cement to intergrow between the zeolite particles promised to, under proper conditions, provide a smooth non-boundary interface with the zeolite particles and eliminate interparticle voids. The influence of zeolite contents in the composite membranes, operating pressures and temperatures on the performance of the membranes were examined. Gas permeation results show a hydrogen permeance of 4.1 × 10-8 mol.m-2.s-1.Pa-1 a CO2 permeance of 1.6 × 10-9 mol.m-2.s-1.Pa-1 and a H2/CO2 single gas selectivity of 25 were obtained at 25oC and 1 atm. The gas permeance through the clinoptilolite cement composite membrane was dependent on operating temperature, indicating that the permeation through the membrane was an activated diffusion process and that the permeation through the zeolite embedded in the composite membrane was predominant. However, the increase of gas permeation and the corresponding decrease of H2/CO2 selectivity with increasing total pressure are an indication of some defects in the composite membranes. Further research to optimize the membrane preparation conditions and to modify the membrane surface to improve hydrogen permeation and H2/CO2 selectivity is needed.
Language
English
DOI
doi:10.7939/R3J59Z
Rights
License granted by Amir Hossein Shafie (shafie@ualberta.ca) on 2011-11-04T20:26:10Z (GMT): 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 the above terms. The author reserves all other publication and other rights in association with the copyright in the thesis, and except as herein 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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