抄録
Carbon dioxide reforming of methane, or dry reforming, is one of the alternative ways to produce synthesis gas. This reaction has many advantages over steam reforming. However, this reaction has an important problem that is carbon deposition on the catalysts. Much effort has been directed toward development of catalysts, which give high activity and stability. The purpose of this work is to study the effect of metal loading, adding promoters, and reaction temperature of carbon dioxide reforming of methane reaction over Ni supported on clinoptilolite, which is the most abundant natural zeolite. The promoter that was selected to be used is Ce. All of the catalysts were prepared by using incipient wetness impregnation method. The reaction was performed at 700°C. The results shown that at 700°C, 8wt%Ni/clinoptilolite gave the highest activity over 1wt%, 3wt%, 5wt%, 10wt%, and 15wt% Ni loading. It gave more than 60% conversion of CH4 and CO2 and also gave high hydrogen selectivity. After added promoters to 8wt%Ni/clinoptilolite, it was found that Ce could enhance both activity and stability of this catalyst. With 3wt%Zr the catalyst gave about 70% conversion of CH4 and CO2.
