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KEYWORD: Ni/SiO2 Catalyst; CH4-CO2; Reforming; Promoter ABSTRACT: The nickel based catalysts were prepared by the method of impregnation. The influ- ence of the Ni loading, the calcination temperature, the reduction temperature, the promoter on the catalyst performances in the CH4-CO2 reforming reaction was investigated. The results indicate that the Ni/SiO2 catalyst with the 10%Ni loading and calcined at 773 K for 2 h and reduced at 723 K for 2 h exhibited the best activity in the reaction, and the conversion of CH4, CO2 and total carbon were 67.27%, 67.21%, 67.24%, respectively. The influence of the Cr2O3 promoter on the properties of the catalysts was investigated. The results show that the carbon deposition on the Ni/SiO2/Cr2O3 catalyst was decreased, and the activity of the catalyst was enhanced by adding Cr2O3 promoter in the Ni/SiO2 catalyst. The conversion of CH 4, CO 2 and total carbon reached 69.86%, 70.47% and 70.20% on the Ni/SiO2/Cr2O3 catalyst with the 10% Ni and 1.0% Cr2O3 calcined at 773K for 2 h and reduced at 723K for 2 h in the CH4-CO2 reforming reaction. The carbon deposition on Ni/SiO2/Cr2O3 catalyst was decreased 26.35% compared to that on Ni/SiO2 catalyst.

Influence of Ni based catalysts on CH4-CO2 reforming reaction