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|Title:||Chemical and transport behaviors in a microfluidic reformer with catalytic-support membrane for efficient hydrogen production and purification|
Leung, Dennis Y. C.
Leung, Michael K. H.
|Source:||International journal of hydrogen energy, Feb. 2012, v. 37, no. 3, p. 2614-2622.|
|Abstract:||Microchannel reformer integrated with H₂ selective membrane offers an efficient, compact and portable way to produce hydrogen. The performance of a membrane-based microfluidic reformer is restricted by species diffusion limitation within the porous support of the membrane. Recent development in novel catalytic-supported membranes has the potential to enhance H₂ production by decimating the diffusion limitation. Loading a Pd-Ag layer on to a Ni-catalytic porous support, the membrane achieves both H₂ separation and production functions. In this study, a two-dimensional CFD model combined with chemical kinetics has been developed to simulate a microchannel autothermal reformer fed by methane. The species conversion and transport behaviors have been studied. The results show that the permeation process enhances the mass transport within the catalytic layer, and as a result, the reactions are intensified. Most notably, the effectiveness factor of the water-gas shift reaction as high as 6 is obtained. In addition, the effects of gaseous hourly space velocity (GHSV) on methane conversion and H₂ flux through the membrane are also discussed, and an optimal value of GHSV is suggested.|
|Rights:||International journal of hydrogen energy Copyright © 2011, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved. The journal web site is located at http://www.sciencedirect.com.|
NOTICE: this is the author’s version of a work that was accepted for publication in International journal of hydrogen energy. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in International journal of hydrogen energy, vol. 37, no. 3 (Feb 2012), DOI: 10.1016/j.ijhydene.2011.10.091
|Appears in Collections:||BRE Journal/Magazine Articles|
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