Promoting effect of Zr on the catalytic combustion of methane over Pd/γ-Al

2014, Volume 8, Issue 5

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Frontiers of Environmental Science & Engineering >> 2014, Volume 8, Issue 5 doi: 10.1007/s11783-013-0613-1

Promoting effect of Zr on the catalytic combustion of methane over Pd/γ-Al

1. School of Chemistry and Environment, Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of Education, Beihang University, Beijing 100191, China.2. State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China

Available online: 2014-06-20

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Abstract

The effect of Zr on the catalytic performance of Pd/γ-Al O for the methane combustion was investigated. The results show that the addition of Zr can improve the activity and stability of Pd/γ-Al O catalyst, which, based on the catalyst characterization (N adsorption, XRD, CO-Chemisorption, XPS, CH -TPR and O -TPO), is ascribed to the interaction between Pd and Zr. The active phase of methane combustion over supported palladium catalyst is the Pd /Pd mixture. Zr addition inhibits Pd aggregation and enhances the redox properties of active phase Pd / Pd . H reduction could effectively reduce the oxidation degree of Pd species and regenerate the active sites (Pd / Pd ).

Keywords

Pd-Zr/Al₂O₃ ; methane ; catalytic combustion ; catalyst regeneration

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