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Effect of pretreatment on the activity of Ni catalyst for CO removal reaction by water–gas shift and methanation

Cited 93 time in Web of Science Cited 100 time in Scopus
Authors

Kim, Sung Ho; Nam, Suk-Woo; Lim, Tae-Hoon; Lee, Ho-In

Issue Date
2008
Publisher
Elsevier
Citation
Applied Catalysis B: Environmental 81 (2008) 97–104
Keywords
Fuel processorDisk typeCarbon monoxideWater–gas shiftMethanation
Abstract
An Ni metal catalyst manufactured by the tapecasting method for use as a structural catalyst did not exhibit catalytic activity for the carbon
monoxide (CO) removal reaction. However, the catalyst pretreated by an oxidation and reduction process showed superior activity for CO removal
via water–gas shift and methanation, resulting in a decrease of the CO concentration to below 1% in reformate gas. The catalytic activity was
generated by the reorganization of the surface structure of Ni metal, and enhanced by surface oxygen intermediates such as Ni(OH)2 and NiOOH
promoted by NiO oxidized incompletely after the pretreatment. After the reorganization process induced by the pretreatment, the Ni metal on the
surface was converted to active Ni and NiO which played the role of a promoter.
# 2007 Elsevier B.V. All rights reserved.
ISSN
0926-3373
Language
English
URI
https://hdl.handle.net/10371/61296
DOI
https://doi.org/10.1016/j.apcatb.2007.12.009
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