Fe Doped Bimodal Macro/Mesoporous Nickel-Based Catalysts for CO2–CH4 Reforming

Dry reforming of methane (DRM) is an important process to generate syngas for synthesis of clean liquid fuels and valuable chemicals, but the quick carbon deposition-induced catalyst deactivation hampers its further industrial application. In this paper, Fe doped Ni/Al2O3 catalysts with bimodal-pore stucture are prepared via a one-pot evaporation-induced self-assembly (EISA) method. Characterization results demonstrate that the unique bimodal-pore architecture and the precisely controlled interaction between Ni and Fe guarantee the high activity and excellent stability of the Ni-based catalysts in the DRM reaction. The catalytic performances were tested under atmospheric pressure at 700 °C. The result indicated that the catalyst with a Fe/Ni ratio = 0.5 exhibited the best catalytic performance and carbon deposition resistance after the long-term stability reaction of 100 h, and the conversion rate of CH4 and CO2 remains 76.8% and 85.6%, respectively. The novel strategy for the rational design of Ni-based catalysts will pave the way for the development of the DRM catalytic system.