Research progress on influence of Pd-based catalyst supports on natural gas catalytic combustion
Natural gas is widely used in chemical synthesis and transportation.As the main component of natural gas,methane has a strong greenhouse effect,and its incomplete combustion will have adverse effects on the environment.Catalytic combustion technology is an effective method to solve the problem of incomplete methane combustion,in which palladium(Pd)-based catalysts are the core of the technology,and the supports are important factors affecting the catalytic activity of Pd-based catalyst for methane catalytic combustion.Firstly,the mechanism of methane catalytic combustion was described.Secondly,the research progress of Pd-based catalysts at home and abroad in recent years was summarized.For Pd-based catalysts with porous particle carrier,the researches focus on improving the dispersion of Pd,stability and heat resistance,so as to enhance catalytic activity and reduce Pd load,thus reducing cost.As for monolithic Pd-based catalysts,the researches focus on improving the effective specific surface area,heat and mass transfer efficiency and structural stability to adapt to large flux methane catalytic combustion.Finally,the future research development trends of Pd-based catalyst supports for methane catalytic combustion were prospected,including optimizing the coating process of the monolithic Pd-based catalyst skeleton supports to improve catalytic efficiency,using new materials instead of traditional support materials to prepare high-performance catalysts,and carrying out the support life cycle experiments to ensure the long-term stability of the catalysts.
natural gas catalytic combustionPd-based catalystscatalytic activitysupports
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