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Methane decomposition over ceria modified iron catalysts

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Title: Methane decomposition over ceria modified iron catalysts
Authors: Tang, Liangguang, Yamaguchi, Doki, Burke, Nick, Trimm, David, Chiang, Ken Ken.Chiang@csiro.au
Source: Catalysis Communications. Sep2010, Vol. 11 Issue 15, p1215-1219. 5p.
Subjects: Iron catalysts, Catalyst supports, Chemical decomposition, Methane, Metallic oxides, Metallic surfaces, Temperature effect, Carbon monoxide
Abstract: Abstract: The catalytic behaviour of ceria supported iron catalysts (Fe–CeO2) was investigated for methane decomposition. The Fe–CeO2 catalysts were found to be more active than catalysts based on iron alone. A catalyst composed of 60wt.% Fe2O3 and 40wt.% CeO2 gave optimal catalytic activity, and the highest iron metal surface area. The well-dispersed Fe state helped to maintain the active surface area for the reaction. Methane conversion increased when the reaction temperature was increased from 600 to 650°C. Continuous formation of trace amounts of carbon monoxide was observed during the reaction due to the oxidation of carbonaceous species by high mobility lattice oxygen in the solid solution formed within the catalyst. This could minimise catalyst deactivation caused by carbon deposits and maintain catalyst activity over a longer period of time. The catalyst also produced filamentous carbon that helped to extend the catalyst life. [ABSTRACT FROM AUTHOR]
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Database: Engineering Source
Description
Abstract:Abstract: The catalytic behaviour of ceria supported iron catalysts (Fe–CeO2) was investigated for methane decomposition. The Fe–CeO2 catalysts were found to be more active than catalysts based on iron alone. A catalyst composed of 60wt.% Fe2O3 and 40wt.% CeO2 gave optimal catalytic activity, and the highest iron metal surface area. The well-dispersed Fe state helped to maintain the active surface area for the reaction. Methane conversion increased when the reaction temperature was increased from 600 to 650°C. Continuous formation of trace amounts of carbon monoxide was observed during the reaction due to the oxidation of carbonaceous species by high mobility lattice oxygen in the solid solution formed within the catalyst. This could minimise catalyst deactivation caused by carbon deposits and maintain catalyst activity over a longer period of time. The catalyst also produced filamentous carbon that helped to extend the catalyst life. [ABSTRACT FROM AUTHOR]
ISSN:15667367
DOI:10.1016/j.catcom.2010.07.004