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Modelling Hydrogen Separation in High Temperature Silica Membrane Systems

Duke, Mikel and Diniz da Costa, J. C and Lu, G. Q and Gray, Peter G (2006) Modelling Hydrogen Separation in High Temperature Silica Membrane Systems. AIChE Journal (American Institute of Chemical Engineers ), 52 (5). pp. 1729-1735. ISSN 0001-1541

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Abstract

In this work, a working model is proposed of molecular sieve silica (MSS) multistage membrane systems for CO cleanup at high temperatures (up to 500°C) in a simulated fuel cell fuel processing system. Gases are described as having little interactions with each other relative to the pore walls due to low isosteric heat of adsorption on silica surfaces and high temperatures. The Arrhenius function for activated transport of pure gases was used to predict mixture concentration in the permeate and retentate streams. Simulation predicted CO could be reduced to levels below the required 50 ppmv for polymer electrolyte membrane fuel cell anodes at a stage H2/CO selectivity of higher than 40 in 4 series membrane units. Experimental validation showed predicting mixture concentrations required only pure gas permeation data. This model has significant application for setting industrial “stretch targets” and as a robust basis for complex membrane model configurations.

Item Type: Article
Uncontrolled Keywords: ResPubID18932, mixture modeling, silica membrane, hydrogen separation, CO poisoning, stretch targets
Subjects: Faculty/School/Research Centre/Department > Institute for Sustainability and Innovation (ISI)
Depositing User: VUIR
Date Deposited: 23 Apr 2012 04:05
Last Modified: 12 Feb 2015 23:00
URI: http://vuir.vu.edu.au/id/eprint/2964
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Citations in Scopus: 11 - View on Scopus

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