Low-Pressure Sorption-Enhanced Hydrogen Production

The sorption-enhanced production of hydrogen involves the simultaneous steam−methane reforming, water−gas shift, and CO2 removal reactions in the presence of a reforming catalyst and CO2 sorbent. High concentrations of H2 with low concentrations of CO are produced in a single reaction step. Pure CO2...

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Bibliographic Details
Published in:Industrial & engineering chemistry research 2005-03, Vol.44 (6), p.1665-1669
Main Authors: Yi, Kwang Bok, Harrison, Douglas P
Format: Article
Language:English
Subjects:
Applied sciences
Chemical engineering
Exact sciences and technology
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Summary:The sorption-enhanced production of hydrogen involves the simultaneous steam−methane reforming, water−gas shift, and CO2 removal reactions in the presence of a reforming catalyst and CO2 sorbent. High concentrations of H2 with low concentrations of CO are produced in a single reaction step. Pure CO2 suitable for use or sequestration may be produced during sorbent regeneration. This study examined the sorption-enhanced H2 production reactions at low pressure, which also requires a low reaction temperature so that the sorbent will retain its effectiveness for CO2 capture. H2 concentrations in excess of 96 mol % (dry basis) and CO concentrations as low as 7 ppmv (dry basis) were produced in tests between 1 and 5 bar and 400 and 460 °C using a H2O-to-CH4 feed ratio of 3. Calcined Arctic SHB dolomite proved to be an effective CO2 sorbent that did not require pretreatment for sulfur removal.
ISSN:0888-5885
1520-5045
DOI:10.1021/ie048883g