Catalytic Performance of Pt/ZrO2 and Pt/Ce-ZrO2 Catalysts on CO2 Reforming of CH4 Coupled with Steam Reforming or Under High Pressure

摘要: CO2 reforming of methane was performed on Pt/ZrO2 and Pt/Ce-ZrO2 catalysts at 1073 K under different reactions conditions: (i) atmospheric pressure CH4:CO2 ratio 1:1 2:1; (ii) in the presence water (iii) (105 190 psig) 2:1. The Pt supported ceria-promoted ZrO2 catalyst more stable than all reaction conditions. We ascribe this higher stability to density oxygen vacancies promoted support, which favors cleaning mechanism metal particle. increase either or total causes a decrease activity for both catalysts, because case rate decomposition becomes transfer. always catalyst, demonstrating important role support reaction.