Effect of Gd Promoter on the Structure and Catalytic Performance of Mesoporous Ni/Al2O3-CeO2 in Dry Reforming of Methane

A few Gd promoted Ni/Al2O3-CeO2 catalysts were synthesized by one pot Pechini method and were employed in dry reforming of methane (DRM). The physicochemical characteristics of the catalyst samples were detected by N-2 adsorption-desorption, etc., which confirmed the successful synthesis of Ni/Al2O3-CeO2-x% Gd2O3 with mesoporous structure. The effects of Gd loading amount and calcined temperature on the catalytic ability were investigated and evaluated. Experimental results indicated that the optimal Gd loading amount and calcined temperature for the desired catalysts were 1.2% and 800 degrees C, respectively. Meanwhile the Ni/Al2O3-CeO2-1.2%Gd2O3 achieved its peak CH4 and CO2 conversions of 86% and 94%, respectively. It can be concluded that the Gd promoted catalysts showed an outstanding catalytic performance and stability in DRM, and the proper amount Gd addition tended to weaken NiAl2O4 formation and improved the catalytic activity, which would present a great potential for industrial utilization in the future.