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 degrees 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.

Automated summary

The study prepared Fe-doped Ni/Al2O3 catalysts with bimodal-pore structure using the EISA method, which demonstrated improved stability and activity in the DRM reaction. The long-term stability of the catalytic reaction was tested, showing promising results for the development of DRM catalytic systems.