CATALYTIC COMBUSTION OF METHANE OVER PALLADIUM-BASED CATALYSTS

Palladium-based catalysts are widely applied in exhaust catalytic converter and catalytic combustion systems. The mechanism for methane oxidation on a Pd-based catalyst is complex. Catalyst activity is influenced by variations in the process pressure and temperature, by the gas mixture composition,...

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Bibliographic Details
Published in:Catalysis reviews. Science and engineering 2002-12, Vol.44 (4), p.593-649
Main Authors: Ciuparu, Dragos, Lyubovsky, Maxim R., Altman, Eric, Pfefferle, Lisa D., Datye, Abhaya
Format: Article
Language:English
Subjects:
Activation
Arrays
Catalysis
Catalysts
Catalytic reactions
Chemistry
Combustion
Exact sciences and technology
General and physical chemistry
Inhibitory effects
Methane
Methane combustion
Oxidation
Oxidation/reduction mechanisms
Palladium
Restructuring
Supported palladium catalyst
Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry
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Summary:Palladium-based catalysts are widely applied in exhaust catalytic converter and catalytic combustion systems. The mechanism for methane oxidation on a Pd-based catalyst is complex. Catalyst activity is influenced by variations in the process pressure and temperature, by the gas mixture composition, by the type of support and various additives, and by pretreatment under reducing or oxidizing atmospheres. In this paper, we review the literature on supported Pd catalysts for combustion of methane. The mechanisms involved are discussed taking into consideration the oxidation/reduction mechanisms for supported palladium, poisoning, restructuring, the form of oxygen on the surface, methane activation over Pd and PdO phases, and transient behavior. Our review helps explain the array of experimental results reported in the literature.
ISSN:0161-4940
1520-5703
DOI:10.1081/CR-120015482