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Development of multifunctional Ni/CaO-Al2O3 pellet for hydrogen production from sorption-enhanced steam reforming of simulated biogas

Author

Listed:
  • Nimmas, Talita
  • Nantapong, Paveenuch
  • Wongsakulphasatch, Suwimol
  • Chanthanumataporn, Merika
  • Ratchahat, Sakhon
  • Cheng, Chin Kui
  • Assabumrungrat, Suttichai
  • Hinrichsen, Olaf

Abstract

Multifunctional material, Ni/CaO-Al2O3 was successfully developed in pellet form for practical application for hydrogen production via sorption-enhanced steam reforming of biogas. The pellet possesses mechanical robustness but led to diffusion limitation, lowering H2 purity to 80% at 650 °C and 1 bar. To improve performance, CeO2 and MgO promoters were introduced. The Ce-modified pellets (Ni-Ce/CaO-Al2O3) showed superior properties due to higher surface area, improved Ni dispersion, and oxygen vacancies. They maintained stable H2 purity (77% v/v) under CO2-rich conditions (CH4/CO2 = 60/40% v/v) and achieved high purity at an optimal S/C ratio of 2, reducing energy demand by ∼28% compared with S/C = 3. Long-term stability over 20 cycles confirmed a minor drop in H2 purity, decreasing from 77% to 72% with no significant changes in CO, CH4, or CO2, indicating strong resistance to deactivation.

Suggested Citation

  • Nimmas, Talita & Nantapong, Paveenuch & Wongsakulphasatch, Suwimol & Chanthanumataporn, Merika & Ratchahat, Sakhon & Cheng, Chin Kui & Assabumrungrat, Suttichai & Hinrichsen, Olaf, 2026. "Development of multifunctional Ni/CaO-Al2O3 pellet for hydrogen production from sorption-enhanced steam reforming of simulated biogas," Renewable Energy, Elsevier, vol. 272(C).
    • Handle: RePEc:eee:renene:v:272:y:2026:i:c:s0960148126008694
    DOI: 10.1016/j.renene.2026.126043
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