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A Ni based mesoporous γ-Al 2 O 3 (MA) catalyst was prepared via partial hydrolysis without organic surfactants and employed in the carbon dioxide methanation reaction. The obtained catalysts were characterized by N 2 adsorption-desorption, H 2 -TPR, XRD, XPS, TG, SEM and TEM-EDS techniques. CO 2 methanation was performed in a fixed-bed reactor. A high surface area of MA with excellent hydrothermal stability was obtained, which promoted the dispersion of nickel species, producing a better catalytic performance. Incorporation of more NiO species into the Ni/MA catalyst increased the amount of active metallic Ni sties, further improving the catalytic activity and CH 4 selectivity. Moreover, the monolithic skeleton of MA with fabric-like walls suppressed the aggregation of active metallic Ni sites and carbon deposition, enhancing the catalyst's stability, which provides a new insight for potential industrial applications.

Preparation of Ni based mesoporous Al2O3 catalyst with enhanced CO2 methanation performance

Preparation of Ni based mesoporous Al₂O₃ catalyst with enhanced CO₂ methanation performance