Understanding the effect of Sm2O3 and CeO2 promoters on the structure and activity of Rh/Al2O3 catalysts in methane steam reforming
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Date
2012-12
Publication Type
Journal Article
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yes
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Abstract
The role of Sm₂O₃ and CeO₂ promoters on the structural properties and catalytic behavior of Rh/xSm₂O₃-yCeO₂-Al₂O₃ catalysts during methane steam reforming (MSR) was investigated. Promoted catalysts showed higher reaction rates per surface Rh atom and improved stability compared to Rh/Al₂O₃. In situ X-ray absorption revealed that the structure of Rh particles in Rh/Al₂O₃ changes drastically during MSR, while it was stable in the presence of Sm₂O₃-CeO₂. Sintering of the active metal phase was the main cause of deactivation. STEM images showed stronger Rh agglomeration of the unpromoted catalyst with time on stream. © 2012 Elsevier Inc. All rights reserved.
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published
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Journal / series
Volume
296
Pages / Article No.
86 - 98
Publisher
Academic Press
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Subject
Methane steam reforming; Rh/Al2O3 catalysts; CeO2; Sm2O3; In situ X-ray absorption
Organisational unit
03746 - Van Bokhoven, Jeroen A. / Van Bokhoven, Jeroen A.