Tuning Metal–Support Interactions on Ni/Al2O3 Catalysts to Improve Catalytic Activity and Stability for Dry Reforming of Methane

Ni-based catalysts supported on alumina derived from the pseudo-boehmite prepared by impregnation method were employed for catalytic dry reforming of methane reaction at temperature 550–750 °C. The effect calcination physicochemical properties such as Ni dispersion, reduction degree, nickel crystallite sizes, and metal–support interaction was investigated. characterization results show that increasing catalyst leads to formation nickel-alumina spinel, which enhances increases temperature. nanoparticle size decreases effective dispersion with 450 °C 750 due aluminate. calcined exhibits highest CH4 CO2 conversion owing small Ni0 active sites high dispersion. In a 200 h stability test in 700 °C, Ni/Al2O3-750 excellent anti-coking ability.