Optimizing Biogas Reforming with Nickel-based Egg-shell Catalysts
Key Ideas
  • Novel egg-shell catalysts showed improved surface reducibility and reactant access in combined reforming of biogas.
  • 2E-T0.1 catalyst exhibited high CH4 and CO2 conversions, stable activity, and excellent coke resistance at 700°C.
  • Control of O/C ratio enabled production of H2-rich syngas suitable for methanol or Fischer–Tropsch synthesis.
The article discusses the utilization of biogas through the combined reforming of methane (CRM) process, which involves the use of CH4, CO2, and H2O. Nickel-based catalysts are commonly used for CRM reactions but face deactivation due to coking. A study introduced Ni/Al2O3 egg-shell pellet catalysts synthesized using a novel wetness impregnation method. The egg-shell catalysts demonstrated higher surface nickel concentrations, leading to improved reactant access and reducibility. The 2E-T0.1 catalyst showed superior performance in terms of CH4 and CO2 conversions, stability, and coking resistance compared to homo type catalysts. By controlling the steam ratio, the production of H2-rich syngas was achieved. The study highlights the significance of spatial nickel distribution in enhancing catalytic performance and resistance to coking. The article also emphasizes the importance of renewable energy sources like biogas and the development of efficient catalysts for biogas reforming applications, contributing to carbon neutrality and sustainable energy production.
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