Alumina supported manganese oxide doped noble metal oxides for catalytic methanation reaction of simulated natural gas

Abstract

Manganese oxide doped noble metal supported on alumina was prepared for methanation reaction by doping the manganese oxide based catalyst with noble metals namely ruthenium and palladium via impregnation method. All the catalysts were calcined at 400°C and 1000°C for 5 hours separately. In-house-built micro reactor with Fourier Transform Infra Red (FTIR) detector and Gas Chromatography (GC) were used to study the percentage of carbon dioxide (CO 2) conversion and also the percentage of methane (CH 4) formation. It was found that the catalyst with Ru:Mn(25:75)-Al 2O 3 calcined at 1000°C showed 60.21% formation of CH 4 at 200°C. FESEM illustrated that catalyst surface is covered with small and dispersed particles with undefined shape. The X-Ray Diffraction (XRD) analysis revealed that the catalyst is crystalline. Moreover, Nitrogen Gas Adsorption (NA) analysis showed that both fresh and spent catalysts are of mesoporous material with type III isotherm and type H 3 hysteresis loop. Furthermore, fresh catalyst has 84.887 Å pore diameter which is bigger than used catalyst which is 79.053Å.