Post-Plasma Catalysis for Methane Partial Oxidation to Methanol: Role of the Copper-Promoted Iron Oxide Catalyst

摘要

Methane-air partial oxidation to methanol over a ceramic-supported Fe2O3-CuO catalyst was investigated in a post-plasma catalytic reactor at ambient conditions The multicomponent catalyst exerted a better catalytic performance than the monocomponent Fe2O3 catalyst. Characterization of the catalysts by XPS showed that incorporation of the CuO additive to a Fe2O3-based catalyst resulted in an increase of lattice oxygen m the surface of the catalyst which facilitated selective methane oxidation. Hydrogen temperature-programmed reduction revealed that addition of the CuO promoter could improve the reduction performance of the catalyst Moreover, this catalyst showed excellent stability and resistance against carbon deposition m the extended reactions while maintaining catalytic activity. A post-plasma catalytic mechanism is proposed with three main pathways to methanol synthesis.