The mechanism on enhancing heat and mass transfer property for improving CH4 catalytic combustion performance of hollow CeO2 microspheres

Abstract

In this work, hollow CeO2 microspheres were synthesized and the catalytic performance of lean-CH4 combustion and stability were conducted. The structure property of the hollow CeO2 microspheres was characterized for tentatively exploring the catalytic advancement of hollow CeO2 microspheres. Further, the heat and mass transfer property of hollow CeO2 microspheres was calculated to investigate the mechanism of reactants/products and heat transfer property on hollow structure. The hollow CeO2 microspheres show greater catalytic performance and long term stability than the solid CeO2. The numerical results indicate that the hollow structure could increase the heat and mass transfer property, which could improve the reaction rate in the light off stage, thermodynamic region and homogeneous reaction region of the methane combustion process. This work provides a sight for increasing the heat and mass transfer property of catalyst for heterogeneous catalysis reaction.