Understanding Catalytic CO2 Reforming of CH4: Effect of Basic Support (Dolomite, Talc and Alkaline Sludge) on NiO-Based Catalyst

Abstract

Supports material contain Mg and/or Ca influence the reactivity of NiO-based catalysts. Thus, the development of NiO/Dolomite, NiO/Talc and NiO/AS successfully synthesized by the simple wet-impregnation method. The characterization of prepared catalysts by XRD and N2 adsorption-desorption analysis reveals that the contained species in each catalyst greatly affected the textural properties of catalysts such as BET surface area, porosity, crystallite, and particle size. Thus, TPR-H2 displayed reducability of active metal influence by physical properties. Meanwhile, basic sides of prepared catalysts contributed by O2- ion attributed by Mg and/or Ca in the support material. Thus, the apparent Ea of NiO/Dolomite, NiO/Talc and NiO/AS are +115.47, +114.90 and +135.21 kJ mol-1 respectively. In addition, the formation of carbon is strongly affected by crystallite and particle sizes together with the dispersion of NiO species. In conclusion, the catalytic performance of NiO-based catalyst much influence by the physicochemical properties of catalyst which contributed by Mg and/or Ca contain in the support’s material.