Effects of Operating Parameters and Feed Gas Compositions on the Dry Reforming of Methane over the Ni/Al2O3 Catalyst

The effects of operating parameters such as reaction temperature, space velocity, and feed gas composition on the performance methane dry-reforming (DRM) over Ni/Al2O3 catalyst are systemically investigated. catalyst, which is synthesized by conventional wet impregnation, showed well-developed mesoporosity with well-dispersed Ni nanoparticles. CH4 CO2 conversions dramatically increased both temperature increased, velocity decreased. composition, especially CO2/CH4 ratio, significantly influences DRM performance, deactivation behavior side reactions. When CO2-rich (CO2/CH4 > 1) was used, a reverse water shift (RWGS) occurred, leading to consumption hydrogen produced from DRM. CH4-rich < induces severe carbon depositions followed Boudouard reaction, resulting in catalytic activity drastically decreasing at beginning stable conversion. after different ratio analyzed investigate amount structure deposited catalyst. In this study, we suggested that optimal conditions can achieve performances terms conversion, production long-term stability.