Ni-ZrO2/SiO2 Catalyst Used for CO Selective Methanational in Hydrogen-Rich Gases by Sol-gel Method

In order to solve the CO removing problem in fuel cell technology using hydrogen as resource, the method of selective methanation is adopted to remove CO in hydrogen-rich atmosphere. Ni~ZrO₂/SiO₂ catalyst were prepared by sol-gel method and its activity is investigated. The effect of preparation conditions including NiO loadings and calcination temperature on catalytic activity is investigated in hydrogen purification. The results indicates that NiO loadings and the content of ZrO₂ significantly influence the performance of Ni~ZrO₂/SiO₂ catalyst. When reaction temperature at 260°C, CO can be reduced to 0ppm, selectivity of H₂ on CO is over 99%. It can fully meet the need of hydrogen requirements of proton exchange membrane fuel cell.