Positive Effects of CeO2 Promoter and Co-Reactant/CO on Methanation of CO2-Rich Gas over Ni/SBA-15 Catalyst

NiO/SBA-15 catalysts modified by CeO2 were synthesized and studied for the hydrogenation of CO2-rich gas. Effect of CeO2 promoter on the physicochemical properties of the catalysts was investigated by BET, XRD, Raman spectroscopy, SEM, TEM, H-2-TPR and CO2-TPD methods. The 4 mass% CeO2 addition improved reduction and dispersion of Ni, resulting in its higher activity in methanation, reaching CO2 conversion of 90% at 350 degrees C. Furthermore, the performance of the prepared catalysts in methanation reaction was enhanced by adding small amount of CO (1 mol%) in the feedstock.