Effect and behavior of cerium oxide in Nih/gamma-Al2O3 catalysts on autothermal reforming of methane: CeAlO3 formation and its role on activity

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Nickel supported gamma-alumina (Ni/gamma-Al2O3) catalysts are well-known to be highly active on the autothermal reforming of methane, but to be unstable due to coke deposition. Cerium oxide (CeO2) is one of promising promoter to overcome the fast deactivation of nickel-based catalysts by coke formation. Herein, catalytic behavior of CeO2 over Ni/gamma-Al2O3 catalysts on the autothermal reforming of methane was investigated. The catalytic activity was maintained for 100 h with H-2/CO molar ratio of 1.9. The formation of CeAlO3 is observed at the reduction and reaction conditions. In this work, it was found that the formation of CeAlO3 promoted the catalytic oxidation toward CO2 and prevented the formation of alpha-Al2O3 and nickel-aluminate, resulting in stable activity for autothermal reforming of methane. Copyright (c) 2013, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Issue Date
2013-05
Language
English
Article Type
Article
Keywords

GAS-SHIFT REACTION; CARBON-DIOXIDE; NI/CEO2-AL2O3 CATALYSTS; HYDROGEN-PRODUCTION; PARTIAL OXIDATION; WATER; NICKEL; NI/CE-ZRO2/THETA-AL2O3; REDUCTION; PROMOTERS

Citation

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, v.38, no.14, pp.6027 - 6032

ISSN
0360-3199
DOI
10.1016/j.ijhydene.2012.12.115
URI
http://hdl.handle.net/10203/250866
Appears in Collection
CBE-Journal Papers(저널논문)
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