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Combining CO2 capture and conversion with Ni-CaO-biochar for rice straw gasification

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  • Sun, Kunpeng
  • Jia, Siqian
  • Wei, Xinzheng
  • Zhao, Chuanwen
  • Cai, Ning

Abstract

Biomass gasification for syngas production is a viable method for both climate change mitigation and energy demand. In this study, biochar, a solid residue from each RS gasification, was used to prepare a CaO-biochar supported Ni composite catalyst, which was reused to catalyze RS gasification for the production of high-value syngas, and the effects of the ratio of CaO to biochar as well as the loading of Ni were investigated. The results showed that the best effect was achieved when the ratio of CaO to biochar was 1:1 and the loading of Ni was 10 wt%, at which time the total gas production was 697.36 mL/g biomass, and the syngas yield was 574.67 mL/g biomass with a ratio of 82.42 vol%. The 10 cycle experiments verified that the catalyst had a better cycle stability. This work demonstrates the great potential of CaO-biochar-based catalysts for efficient biomass gasification and CO2 capture.

Suggested Citation

  • Sun, Kunpeng & Jia, Siqian & Wei, Xinzheng & Zhao, Chuanwen & Cai, Ning, 2025. "Combining CO2 capture and conversion with Ni-CaO-biochar for rice straw gasification," Energy, Elsevier, vol. 334(C).
    • Handle: RePEc:eee:energy:v:334:y:2025:i:c:s0360544225032815
    DOI: 10.1016/j.energy.2025.137639
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