Catalytic hydrogen combustion for treatment of combustible gases from fuel cell processors

Deshpande, Parag A and Madras, Giridhar (2010) Catalytic hydrogen combustion for treatment of combustible gases from fuel cell processors. In: Applied Catalysis B: Environmental, 100 (3-4). pp. 481-490.

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Abstract

Catalytic combustion of H-2 was carried out over combustion synthesized noble metal (Pd or Pt) ion-substituted CeO2 based catalysts using a feed stream that simulated exhaust gases from a fuel cell processor The catalysts showed a high activity for H-2-combustion and complete conversion was achieved below 200 C over all the catalysts when O-2 was used in a stoichiometric amount With higher amounts of O-2 the reaction rates Increased and complete conversions were possible below 100 C The reaction was also carried out over Pd-impregnated CeO2 The conversions of H-2 with stoichiometric amount of O-2 were found to be higher over Pd-substituted compound The mechanism of the reaction over noble metal-substituted compounds was proposed on the basis of X-ray photoelectron spectroscopy studies The redox couples between Ce and metal ions were established and a dual site redox mechanism was pi posed for the reaction (C) 2010 Elsevier B V All rights reserved

Item Type:	Journal Article
Publication:	Applied Catalysis B: Environmental
Publisher:	Elsevier Science B.V.
Additional Information:	Copyright of this article belongs to Elsevier Science B.V.
Keywords:	Catalytic combustion; Combustion synthesis; Ionic catalysts; Redox couples; XPS; Dual site mechanism
Department/Centre:	Division of Mechanical Sciences > Chemical Engineering
Date Deposited:	13 Dec 2010 10:31
Last Modified:	13 Dec 2010 10:31
URI:	http://eprints.iisc.ac.in/id/eprint/34470

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