Research Advances in Methanation Catalysts and Their Catalytic Mechanisms

Recent advances in methanantion catalysts and catalytic mechanism together with the wide applications of methanation in industry were reviewed,focusing on the effects of catalyst supports,promoters,active components as well as preparation methods on the performance of methanation catalysts.In addition,the catalytic deactivation and mechanism of methanation reaction for carbon oxides are critically analysed based on the reported work.It is pointed out that the temperature rising derived from exothermic methanation reactions in the catalyst bed and carbon deposition on the catalyst surface are the key factors for catalyst deactivation,which can be avoided considering both catalyst and process.Finally,outlook for the future development of methanation catalyst and further investigation of mechanism is provided in light of the current research status,regarding composite support with the high surface area,catalyst modified with the rare earth elements,sulfur-and heat-resistant catalysts,as well as fluidized bed reactor.