| For the inert activity of methane, methanation catalysts are being used in the process industries to purify gaseous materials. The high performance multi-component methanation catalysts have come to be research objective nowadays for new processes such as Fuel Cell technology and synthesizing clean and high calorific gaseous fuel.;The activity of the catalyst was increased by adding La2O 3 with Ni. La2O3 with Ni increased Ni dispersion and added basicity. The activity was further increased by addition of trace amount platinum group metals Ru and Rh. These metals enhanced dissociative adsorption of H2, and then reduce the main catalyst component NiO x by spilltover hydrogen atoms. A good relationship between the results of TPR and catalytic performance for preferential methanation of CO was confirmed.;This work comprised the preparation of Ni-based multi-component composite catalysts, case studies of reduction properties by using temperature programmed reduction (TPR) method and performance evaluation testing in a continuous flow micro-reactor. Feed gas mixture to the reactor contains 6% CO, 6% CO 2, 44% H2 and 44% N2. The operating conditions are 1 atm pressure and different temperatures within the range of 200°C to 500°C. TPR analysis helped to characterize the effect of precious-metal addition to basic metal oxides and explain the relatively complex spillover mechanism. The four-component methanation catalyst (Ni-La2O 3-Ru-Rh) was found the most active among all methanation catalysts found in literature. In this case of the methanation of CO occurred preferentially at 230°C. Methanation of CO2 occurred after complete conversion of CO. As long as CO presents in the syngas, methanation of CO2 was retarded. |
