RESEARCH ADVANCES IN NOBLE METAL-BASED CATALYSTS FOR LOW-TEMPERATURE COMBUSTION  OF LEAN METHANE

Abstract

Abstract: Methane (CH₄) has a significant greenhouse effect. Due to high costs of collection, purification and low economic efficiency of recycling, China has strictly controlled the emissions of low-concentration methane. Catalytic combustion, characterized by low temperature, uniform reaction, and high efficiency, is an effective method for complete methane oxidation. Noble metal-based catalysts have attracted wide attention owing to low light-off temperature, high catalytic activity, and mild synthesis conditions.This paper reviews the recent progress of noble metal-based catalysts, summarizes the active sites in Pd and Pt-based catalysts and synergistic effects of bimetals, discusses the effects of different supports, and systematically introduces the modification of promoters. Finally, the existing challenges and future development trends of noble metal-based catalysts are prospected.

Key words: methane, catalytic combustion, noble metal-based catalyst, active specie, catalyst support, promoter

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RESEARCH ADVANCES IN NOBLE METAL-BASED CATALYSTS FOR LOW-TEMPERATURE COMBUSTION OF LEAN METHANE

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