Carbon Dioxide Valorization into Methane Using Samarium Oxide-Supported Monometallic and Bimetallic Catalysts

Samarium oxide (Sm2O3) is a versatile surface for CO2 and H2 interaction conversion. oxide-supported Ni, samarium Co-Ni, Ru-Ni catalysts were tested methanation characterized by X-ray diffraction, nitrogen physisorption, infrared spectroscopy, H2-temperature programmed reduction, photoelectron spectroscopy. Limited dissociation widely available carbonate formate species over 20 wt.% dispersed Sm2O3, resulted in ~98% CH4 selectivity. The low selectivity CO could be due to the reforming reaction between (methanation product) CO2. Co-impregnation of cobalt with nickel Sm2O3 had high adsorbed oxygen higher On other hand, co-impregnation ruthenium led more than one catalytic active site, species, lack 94% It indicated following route synthesis Ru-Ni/Sm2O3; ? unstable CH4.