期刊
CHEMCATCHEM
卷 6, 期 5, 页码 1190-1194出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cctc.201400048
关键词
ammonia; membrane reactors; membranes; oxidation; oxygen activation
资金
- European Union [228701]
- Recruitment Program of Global Youth Experts of China
Upon using a reactant/oxygen mixture as co-feed in partial oxidation, adsorbed surface molecular oxygen species can cause low selectivity. We propose a concept different from the conventional co-feed partial oxidation process in packed-bed reactors. In this new configuration, the activation of oxygen is separated from the catalytic oxidation by using an oxygen-permeable membrane to suppress the formation of nonselective surface molecular oxygen species. A continuous flux of lattice oxygen through the membrane allows highly selective partial oxidation. In the oxidation of ammonia to NO, the NO selectivity was improved from 77 to 95% if a La0.6Sr0.4Co0.2Fe0.8O3- oxygen-permeable catalytically active membrane was used at 850 degrees C instead of a co-feed fixed bed reactor.
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