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

Cited 83 time in Web of Science Cited 90 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
http://hdl.handle.net/10371/61296
DOI
https://doi.org/10.1016/j.apcatb.2007.12.009
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College of Engineering/Engineering Practice School (공과대학/대학원)Dept. of Chemical and Biological Engineering (화학생물공학부)Journal Papers (저널논문_화학생물공학부)
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