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Zeolite supported Pd catalysts for the complete oxidation of methane: A critical review

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  • NSTL
  • Elsevier
This review summarizes the recent literature reports on the development of zeolite supported Pd catalysts for the complete oxidation of methane. In-depth analysis reveals that different types of zeolite framework structures, regardless of the dimensionality, pore opening structure, and channel size, have little influence on the methane oxidation activity or the on-stream stability of the supported Pd catalysts. In contrast, the Si/Al ratio of a zeolite support plays a critical role. Both the catalytic activity and the on-stream stability of a Pd/zeolite catalyst increase with the increase of the Si/Al ratio. Catalysts supported on siliceous zeolites consistently show excellent light-off activity and remarkable on-stream stability whether in a dry or wet feed. Silanol nest defect sites in a siliceous zeolite are proposed to be the anchoring sites promoting the formation and minimizing the sintering of finely dispersed Pd nanoparticles. Remaining challenges in overcoming the sulfur poisoning effect are discussed.

Methane oxidationPd catalystsZeolite supportSiliceous zeolitePdO nanoparticlesSilanol nest defect sitesLOW-TEMPERATURE OXIDATIONNATURAL-GASPD/HZSM-5 CATALYSTMESOPOROUS SILICACH4 OXIDATIONPALLADIUM CATALYSTBIMETALLIC CATALYSTCOMBUSTION ACTIVITYREACTION-KINETICSDILUTED METHANE

Chen, Hai-Ying、Lu, Jing、Fedeyko, Joseph M.、Raj, Agnes

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Oak Ridge Natl Lab

Johnson Matthey Inc

Johnson Matthey Technol Ctr

2022

10.1016/j.apcata.2022.118534

Applied Catalysis

Applied Catalysis

ISSN：0926-860X
年,卷(期)：2022.633
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  • 131