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Gold catalysts supported on ceria and ceria–alumina for water-gas shift reaction

Paper ID Volume ID Publish Year Pages File Format Full-Text
43887 45993 2006 6 PDF Available
Title
Gold catalysts supported on ceria and ceria–alumina for water-gas shift reaction
Abstract

Gold-supported catalysts on ceria and ceria–alumina with different ratios in the water-gas shift reaction were studied. It was shown that the addition of alumina leads to the deeper oxygen vacancies formation, detected by Raman and TPR measurements. It was established an increase of the ceria dispersion and as well as slightly increase of the gold particle size. In the presence of alumina after catalytic operation the dispersion of gold and ceria practically does not change. The lower WGS activity on gold/ceria–alumina can be explained on the basis of reduction–oxidation cycle of the reaction. It was established no efficiency re-oxidation of the catalyst surface at the temperatures of the reaction test by the water vapour and we consider this as a main reason of the lower catalytic activity.

Keywords
Gold; Ceria–alumina; WGS; TPR
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Gold catalysts supported on ceria and ceria–alumina for water-gas shift reaction
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 302, Issue 1, 21 March 2006, Pages 127–132
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
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Full-text PDF Download
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Any Questions? feel free to contact us