Synthesis and characterization of hydrogen-selective sol–gel SiO2 membranes supported on ceramic and stainless steel supports

Novel microporous membranes were developed on porous ceramic and stainless steel supports to separate H2 from CO2 or N2. An extensive synthesis and characterization study was carried out, which yielded novel processing routes for microporous membranes. Examples in this article include rapid thermal...

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Bibliographic Details
Published in:Separation and purification technology 2014-01, Vol.121, p.20-29
Main Authors: Van Gestel, Tim, Hauler, Felix, Bram, Martin, Meulenberg, Wilhelm A., Buchkremer, Hans Peter
Format: Article
Language:English
Subjects:
Carbon dioxide
Ceramics
Gas separation membrane
Ink-jet printing
Materials selection
Membranes
Metal supported membrane
Microporous ceramic membrane
Selectivity
Silicon dioxide
Sol gel coating
Stainless steels
Synthesis
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Summary:Novel microporous membranes were developed on porous ceramic and stainless steel supports to separate H2 from CO2 or N2. An extensive synthesis and characterization study was carried out, which yielded novel processing routes for microporous membranes. Examples in this article include rapid thermal processing (RTP), ink-jet printing, and a route for fabricating metal-supported microporous membranes. Pure SiO2 membranes prepared under optimized cleanroom conditions exhibited a reproducible high selectivity for He and H2 towards CO2 and N2 (e.g. average αH2/CO2>70;αH2/N2>150). Microporous membranes prepared with RTP, with an overall processing time of approximately 1h for the microporous top layer, showed a similar gas permeance and high selectivity. Another breakthrough compared to the state of the art is the introduction of a gas-selective metal-supported microporous membrane. The first prototypes, which were fabricated with a commercial stainless steel filter material as support material, exhibited a comparably attractive selectivity for H2 (e.g. αH2/CO2∼50). Ni- and Co-doped membranes were additionally prepared in this study, since they are recognized as a membrane type with improved stability towards water vapour.
ISSN:1383-5866
1873-3794
DOI:10.1016/j.seppur.2013.10.035