Research Advances in Catalysts for Methane Catalytic Combustion

The purpose of catalytic combustion of methane was to reduce its ignition temperature (T₁₀) and total conversion temperature (T₉₀) by catalysis, deepen its oxidation degree, and thus improve the utilization rate of the fuel. In this review, The mechanisms of the catalytic combustion of methane were briefly described. Recent advances in catalysts for catalytic combustion of methane were reviewed in detail in terms of their types, preparation methods and catalytic properties. Noble metal catalysts had excellent catalytic performance, but high cost and poor thermal stability greatly limited their applications. Non-noble metal catalysts, especially composite metal oxide catalysts (such as perovskite-type composite metal oxide catalysts and hexaaluminate series catalysts), possessed high catalytic activity and low cost, and thus had better prospects for development. Improving both low-temperature catalytic activity and high-temperature thermal stability of non-noble metal catalysts may be the main research direction of methane catalytic combustion catalysts in the future.