Please use this identifier to cite or link to this item: https://doi.org/10.1016/j.jcat.2014.03.015
Title: Bimetallic Ni-Cu catalyst supported on CeO2 for high-temperature water-gas shift reaction: Methane suppression via enhanced CO adsorption
Authors: Saw, E.T.
Oemar, U.
Tan, X.R.
Du, Y.
Borgna, A.
Hidajat, K.
Kawi, S. 
Keywords: Copper
High-temperature water-gas shift reaction
Kinetic study
Nickel
Issue Date: 2014
Source: Saw, E.T., Oemar, U., Tan, X.R., Du, Y., Borgna, A., Hidajat, K., Kawi, S. (2014). Bimetallic Ni-Cu catalyst supported on CeO2 for high-temperature water-gas shift reaction: Methane suppression via enhanced CO adsorption. Journal of Catalysis 314 : 32-46. ScholarBank@NUS Repository. https://doi.org/10.1016/j.jcat.2014.03.015
Abstract: The formation of methane as the undesired side product is one of the major issues in the water-gas shift (WGS) reaction, particularly for nickel-based catalysts. A detailed study of Ni-Cu bimetallic catalyst supported on nanopowder CeO2 is extensively investigated to suppress the methanation reaction as well as maintain high WGS reaction rate. XRD, EXAFS, H 2-TPR and XPS reveal the formation of Ni-Cu alloy, while CO-TPR-MS, CO-TPD-MS and in situ DRIFTS show the enhancement of CO adsorption on Ni-Cu alloy at high temperature. The Ni-Cu/CeO2 catalyst with Ni/Cu ratio of 1 exhibits high reaction rate with the least methane formation due to the formation of Ni-Cu alloy phase. The Ni-Cu alloy phase is found to be the active site for WGS reaction with methane suppression as Ni-Cu alloy can enhance CO adsorption which prevents CO dissociation during high-temperature WGS reaction. Kinetic studies performed reveal that one-site carboxyl mechanism could be the main reaction pathway with formate as spectator. However, there could be other possibilities for the real reaction mechanism on Ni-Cu/CeO2 catalyst. © 2014 Elsevier B.V. All rights reserved.
Source Title: Journal of Catalysis
URI: http://scholarbank.nus.edu.sg/handle/10635/88577
ISSN: 10902694
DOI: 10.1016/j.jcat.2014.03.015
Appears in Collections:Staff Publications

Show full item record
Files in This Item:
There are no files associated with this item.

SCOPUSTM   
Citations

91
checked on Feb 14, 2018

WEB OF SCIENCETM
Citations

87
checked on Jan 22, 2018

Page view(s)

44
checked on Feb 19, 2018

Google ScholarTM

Check

Altmetric


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.