Journal
CATALYSIS TODAY
Volume 146, Issue 1-2, Pages 241-247Publisher
ELSEVIER
DOI: 10.1016/j.cattod.2008.12.009
Keywords
CaO; Cyclic stability; Sorption enhanced hydrogen production; Oxygen mobility
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Influences of oxygen vacancy possessing additives (CexZr1-xO2, LaAlyMg1-yO3) on the cyclic stability of Ca-based high temperature CO2 absorbent were investigated. Compared to absorbents composed only of CaO, oxygen vacancy possessing materials added absorbents showed significantly improved cyclic stability in repeated CO2 absorption/desorption. it has been also found that the cyclic stability of CO2 absorbent was proportional to the availability of oxygen vacancy in additives. It was presumed that oxygen vacant site behaves as a jump site for facilitating CO2 diffusion through the product layer formed during carbonation. (C) 2009 Elsevier B.V. All rights reserved.
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