Current research on catalysts and deactivation mechanisms for methane catalytic oxidation

Abstract

Focusing on the complex marine exhaust conditions with high water vapor, trace sulfur compounds and fluctuating operating loads, this work systematically summarizes the structure–activity relationships and anti-deactivation characteristics of mainstream catalysts for marine methane total oxidation. Among noble metal materials, Pd-based catalysts exhibit remarkable low-temperature catalytic activity, while Pt-based catalysts deliver superior sulfur tolerance under harsh flue gas environments. By contrast, the performance advantages of Rh catalysts are mainly effective for partial oxidation of methane. Beyond noble metals, low-cost transition metal oxides, perovskites, zeolites, and metal–organic frameworks (MOFs) have also been comprehensively analyzed, with emphasis on their modification strategies tailored to improve low-temperature activity, hydrothermal stability and sulfur resistance. This review highlights the rational design and directional optimization of multifunctional catalysts targeting the actual demanding marine working conditions, providing theoretical guidance for the development of efficient and durable marine methane emission control technologies.