CO2 hydrogenation over cubic yttrium oxide support: Effect of metal type

CO 2 methanation is an effective strategy for making full use of waste gases and converting them into valuable chemicals. Nowadays, the key challenge is the design of efficient catalysts to enhance low-temperature catalytic performance. The present work studies the effect of metal type on the catalytic performance of yttrium oxide-supported catalysts for CO 2 methanation reaction. Ru/Y 2 O 3 , Ni/Y 2 O 3 , and Co/Y 2 O 3 catalysts were prepared by wetness incipient impregnation method, characterized using N 2 -adsorption/desorption isotherm, XRD, FTIR, and H 2 -TPR and TGA techniques to evaluate the surface, crystal phase, and thermal stability. The catalytic test was conducted with the use of a fixed-bed reactor under atmospheric pressure. The temperature of catalytic performance was 350 °C with a supply of H 2 : CO 2 molar ratio of 4 and a total flow rate of 200 mL/min. The main products of the reaction were CH 4 , and traces of carbon monoxide were present among the products. The methane yield reached 64.67%, 60.03%, and 50.82% over Ru/Y 2 O 3 , Ni/Y 2 O 3, and Co/Y 2 O 3 catalysts, respectively.