Preferential oxidation of CO on Ni/CeO2 catalysts in the presence of excess H-2 and CO2

Malwadkar, S and Bera, Parthasarathi and Hegde, MS and Satyanarayana, CVV (2012) Preferential oxidation of CO on Ni/CeO2 catalysts in the presence of excess H-2 and CO2. Reac Kinet Mech Cat, 107. pp. 405-419.

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Abstract

Preferential oxidation of CO (CO-PROX) was carried out over Ni supported on CeO2 prepared by the co-precipitation method. The influence of metal loadings (2.5, 5 and 10 wt.% Ni) and the reaction conditions such as reaction temperature and feed composition on CO oxidation and oxidation selectivity were evaluated by using dry reformate gas. No other reactions like CO or CO2 methanation, coking, reverse water gas shift (RWGS) reaction is observed in the temperature range of 100–200 �C on these catalysts. Hydrogen oxidation dominates over CO oxidation above the temperature of 200 �C. An increase in oxygen leads to an increase in CO conversion but a simultaneous decrease in the O2 selectivity. It has been noticed that 5 and 10 % Ni/CeO2 show better catalytic activity towards CO-PROX reaction. These catalysts were characterized by SBET, XRD, TEM, XPS and H2-TPR.

Item Type:	Article
Additional Information:	Copyright to this article belongs to M/s. Springer-Verlag
Uncontrolled Keywords:	Fuel cells;CO-PROX;Ni;CeO2;Methanation
Subjects:	CHEMISTRY AND MATERIALS > Chemistry and Materials (General) ENGINEERING > Structural Mechanics
Depositing User:	Ms. Alphones Mary
Date Deposited:	20 Mar 2013 07:29
Last Modified:	28 Oct 2015 07:25
URI:	http://nal-ir.nal.res.in/id/eprint/11514

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