Magnified preparation of catalyst and deactivation mechanism study of syngas methanization

Magnified preparation of the catalyst was studied in this paper. Activity and stability of the catalyst were evaluated through long period, and deactivation mechanism of the catalyst was studied. The study result showed that average conversion of CO and H₂ reached 99.9% and 99.8% respectively, average selectivity of CH₄ attained 98.5%, and the activity of application catalyst was stable after continuous running of 1 000 hours. Deactivation mechanism study of the catalyst showed that the causes of catalyst deactivation with long period operation were carbon deposition and sintering, in which sintering is the main factor resulting in the decrease of catalyst activity.