Remarkable improvement in hydrogen recovery and reaction efficiency of a methanol reforming-membrane reactor by using a novel Knudsen membrane

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When a methanol reforming-membrane reactor is employed as a hydrogen generator for a proton exchange membrane fuel cell, we should simultaneously achieve three important aims in one process: methanol conversion improvement, high hydrogen recovery, and high CO removal efficiency. In this paper, the three important aims were successfully achieved in one process by using a methanol reforming-mesoporous membrane reactor combined with water gas shift (WGS) reaction. In this case, higher permeance of the membrane leads to higher hydrogen recovery and methanol conversion. Therefore, we synthesized a stainless-steel-supported Knudsen membrane with remarkably high permeability via the dipping-rolling-freezing fast drying and soaking-rolling-freezing-fast drying method. Using the stainless-steel-supported Knudsen membrane in a methanol reforming-mesoporous membrane-WGS (MMeW) reactor, hydrogen recovery was 78-79%, and methanol conversion increased by 14-20% in comparison with a conventional reactor without a membrane. Moreover, CO permeated through the Knudsen membrane was successfully eliminated via the WGS reaction in the permeate side of the MMeW reactor.
Publisher
AMER CHEMICAL SOC
Issue Date
2008-03
Language
English
Article Type
Article
Keywords

HIGH THERMAL-STABILITY; WATER-GAS SHIFT; FUEL-CELLS; MESOPOROUS SILICA; CO; PURIFICATION; RUTHENIUM; CATALYSTS; VEHICLES; TITANIA

Citation

INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH, v.47, no.5, pp.1392 - 1397

ISSN
0888-5885
DOI
10.1021/ie0702633
URI
http://hdl.handle.net/10203/3726
Appears in Collection
CBE-Journal Papers(저널논문)
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