Ceria-alumina composite support on the sulfur-resistant methanation activity of Mo-based catalyst

Ceria-alumina composite supports were prepared by co-precipitation, impregnation and deposition-precipitation method, respectively. Co-Mo catalysts supported on the composite supports were evaluated for sulfur-resistant methanation and the appropriate content of CeO₂ in the composite support was further studied. All the samples were characterized by nitrogen adsorption, X-ray diffraction (XRD) and hydrogen temperature-programmed reduction (H₂-TPR). It was found that addition of CeO₂ to Al₂O₃ significantly increased the activity of methanation and 25% CeO₂-Al₂O₃ prepared by deposition-precipitation method had the best sulfur-resistant methanation activity.