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Hydrogen Yield Enhancement in Biogas Dry Reforming with a Ni/Cr Catalyst: A Numerical Study

Author

Listed:
  • Akira Nishimura

    (Division of Mechanical Engineering, Mie University, Tsu 514-8507, Japan)

  • Souta Yamada

    (Division of Mechanical Engineering, Mie University, Tsu 514-8507, Japan)

  • Ryoma Ichii

    (Division of Mechanical Engineering, Mie University, Tsu 514-8507, Japan)

  • Mizuki Ichikawa

    (Division of Mechanical Engineering, Mie University, Tsu 514-8507, Japan)

  • Taisei Hayakawa

    (Division of Mechanical Engineering, Mie University, Tsu 514-8507, Japan)

  • Mohan Lal Kolhe

    (Faculty of Engineering and Science, University of Agder, Jon Lilletuns vei 9, NO 4879 Grimstad, Norway)

Abstract

This numerical study investigates the impact of the reaction temperature, molar ratio of CH 4 :CO 2 , and catalyst porosity ( ε p ) on the H 2 yield and H 2 selectivity during biogas dry reforming over a Ni/Cr catalyst. Using COMSOL Multiphysics, we conducted detailed simulations to elucidate the underlying reaction characteristics. Our findings reveal that increasing ε p from 0.1 to 0.95 significantly provides a 5 times increase in H 2 production and a 2.3% increase in H 2 selectivity while simultaneously reducing CO selectivity by 2.3%. This effect is attributed to the improved mass transfer within the catalyst bed, leading to more efficient reactant conversion and product formation. Additionally, we observed a strong correlation between higher reaction temperatures and increased H 2 yield and H 2 selectivity. By optimizing these operational parameters, our results suggest that Ni/Cr catalysts can be effectively employed for the sustainable production of H 2 from biogas.

Suggested Citation

  • Akira Nishimura & Souta Yamada & Ryoma Ichii & Mizuki Ichikawa & Taisei Hayakawa & Mohan Lal Kolhe, 2024. "Hydrogen Yield Enhancement in Biogas Dry Reforming with a Ni/Cr Catalyst: A Numerical Study," Energies, MDPI, vol. 17(21), pages 1-19, October.
    • Handle: RePEc:gam:jeners:v:17:y:2024:i:21:p:5421-:d:1510297
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