High performance NiO/MOx-Ce0.5Zr0.5O2 catalysts promoted with metal oxides for CH4-H2O reforming

The series of Ce_0.5Zr_0.5O₂ and MO_x-Ce_0.5Zr_0.5O₂ supports were synthesized by a micro-emulsion method. This method efficiently controlled the average particle size of supports below 6 nm. The supported NiO/Ce_0.5Zr_0.5O₂ and NiO/MO_x-Ce_0.5Zr_0.5O₂ catalysts were prepared by an incipient-wetness impregnation method. The OCS measurement and TPR result showed that adding Mg improved obviously the OSC of supports and the interaction between active components and supports. Furthermore, 8 wt%NiO/4wt%MgO-Ce_0.5Zr_0.5O₂ exhibited the highest catalytic performance. Its methane conversion reached up to 96% and enhanced 9% after 5 h compared to 8 wt%NiO/Ce_0.5Zr_0.5O₂. Especially, Its methane conversion was above 97% after 50 h continuous test at 800 °C.