CATALYTIC COMBUSTION OF METHANE OVER PALLADIUM-BASED CATALYSTS

• Published in: Catalysis reviews. Science and engineering Vol. 44; no. 4; pp. 593 - 649
• Main Authors: Ciuparu, Dragos, Lyubovsky, Maxim R., Altman, Eric, Pfefferle, Lisa D., Datye, Abhaya
• Format: Journal Article
• Language: English
• Published: Colchester Taylor & Francis Group 31.12.2002; Taylor & Francis
• 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; Methane; Oxidation reduction; Hydrocarbon; Transition metal; Activation; Palladium; Review; Restructuring; Methane combustion; Supported catalyst; Heterogeneous catalysis; Catalytic combustion; Inhibitory effects; Alkane; Reaction inhibition; Oxidation; Oxidation/ reduction mechanisms; Supported palladium catalyst; Platinoid
• ISSN: 0161-4940; 1520-5703
• DOI: 10.1081/CR-120015482

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.