SF Ji
Catalytic combustion of methane over cobalt-magnesium oxide solid solution catalysts
Ji, SF; Xiao, TC; Wang, HT; Flahaut, E; Coleman, KS; Green, MLH
Authors
TC Xiao
HT Wang
E Flahaut
Professor Karl Coleman k.s.coleman@durham.ac.uk
Academic Visitor
MLH Green
Abstract
A series of cobalt-magnesium oxide solid solution catalysts (CoMgO) have been prepared using urea combustion methods, and characterised by X-ray diffraction (XRD) and laser Raman (LR). The catalytic activities for methane combustion have been tested in a continuous-flow microreactor. The Co content has a significant effect on the activity of the cobalt-magnesium oxide solid solution catalysts. The catalysts containing 5 and 10% Co have the lowest light-off temperature in methane combustion. In the preparation of cobalt-magnesium oxide solid solution catalysts, higher urea to metal ratio favors the formation of the catalysts with smaller crystal particles and leads to a better catalytic performance for methane combustion. Addition of lanthanum nitrate to the solution of Co and Mg nitrate depressed the formation of the cobalt-magnesium oxide solid solution and decreased the activity of the catalysts for methane combustion. The cobalt-magnesium oxide solid solution catalysts are very stable when the calcination or reaction temperature is no more than 900 degreesC. However, the catalytic activity decreases rapidly after high temperature (> 1000 degreesC) calcination, possibly due to sintering of the catalyst and thus decrease of the surface area.
Citation
Ji, S., Xiao, T., Wang, H., Flahaut, E., Coleman, K., & Green, M. (2001). Catalytic combustion of methane over cobalt-magnesium oxide solid solution catalysts. Catalysis Letters, 75(1-2), 65-71
Journal Article Type | Article |
---|---|
Publication Date | 2001 |
Journal | Catalysis Letters |
Print ISSN | 1011-372X |
Publisher | Springer |
Peer Reviewed | Peer Reviewed |
Volume | 75 |
Issue | 1-2 |
Pages | 65-71 |
Keywords | cobalt-magnesium oxide solid solution catalyst; methane combustion;laser Raman; XRDCO,K/MGO CATALYSTS; DIESEL SOOT; PEROVSKITES; LANTHANUM |
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