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Investigation of transition metal-modified biochar as catalysts in the co-pyrolysis of corn cob and polyethylene for enhanced hydrogen production

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  • Li, Pan
  • Zhao, Yu
  • Chen, Hai
  • Wang, Peiping
  • Wu, Xingguo
  • Chen, Wei
  • Chang, Chun
  • Pang, Shusheng
  • Hu, Junhao

Abstract

Hydrogen is an important clean energy source for the future and an essential building block for achieving sustainable development plans and net-zero emissions. This study investigates transition metal-modified biochar catalysts and the effect of temperature on the co-pyrolysis of biomass and plastics for hydrogen-rich gas production. Biochar was modified with Ni and Co, and characterized using XRD, SEM, BET, and FT-IR. The catalysts' performance was assessed by analyzing the distribution of solid, liquid, and gaseous products, along with bio-oil and syngas composition. The 10Ni5Co catalyst showed the highest hydrogen production efficiency at 600 °C pyrolysis and 800 °C reforming, with a H2 selectivity of 37.66 % and H2 yield of 15.05 mmol/g. The optimal pyrolysis temperature ensures proper feedstock decomposition, while the reforming temperature enhances catalyst activity. The 10Ni5Co catalyst exhibited excellent stability, with H2 selectivity only decreasing from 37.66 % to 32.01 % after three cycles. Despite structural degradation at 850 °C, biochar modification increased surface area, allowing for higher transition metal loading. These findings are of great practical significance for promoting the application of biochar-based catalysts in the field of hydrogen production from biomass.

Suggested Citation

  • Li, Pan & Zhao, Yu & Chen, Hai & Wang, Peiping & Wu, Xingguo & Chen, Wei & Chang, Chun & Pang, Shusheng & Hu, Junhao, 2025. "Investigation of transition metal-modified biochar as catalysts in the co-pyrolysis of corn cob and polyethylene for enhanced hydrogen production," Energy, Elsevier, vol. 323(C).
    • Handle: RePEc:eee:energy:v:323:y:2025:i:c:s0360544225014537
    DOI: 10.1016/j.energy.2025.135811
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    References listed on IDEAS

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