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Effect of La, Ce or Pr modified Dol-C dual-support catalysts on the co-gasification of coal gangue and biomass for the production of hydrogen-rich gas

Author

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  • Niu, Yonghong
  • Han, Shuang
  • Chi, Zhengyang
  • Wang, Lingna

Abstract

The accumulation of coal gangue (CG) causes serious environmental pollution. Co-gasifying CG with pine sawdust (PS) for H2-rich syngas is a promising solution, where catalysts matter for hydrogen production and gas composition. In this study, La, Ce, or Pr were added to the dual-support catalysts of dolomite (Dol) and biochar (C) to investigate the effects of different rare earth element-loaded dual-support catalysts on the production of H2-rich syngas from the co-gasification of CG and PS. The experimental results show that when using the La/Ce/Pr-Dol-C catalysts with the optimal loading amount, the H2 components in the gas products are greater than 45 mol%. Among them, the syngas produced by the 2 wt% Pr-Dol-C catalyst has the highest H2 component, reaching 52 mol%, and the yield is 11.28 mmol/g blends. In addition, the effects of various operating conditions on the production of H2-rich gas under the 2 wt% Pr-Dol-C catalyst were explored, and the action mechanism of the catalyst during the co-gasification process was analyzed. The results indicate that the La/Ce/Pr-Dol-C dual-support catalysts can significantly promote the co-gasification reaction of CG and PS, and improve the production and purity of H2-rich gas. This study provides new ways for comprehensively utilizing CG and PS.

Suggested Citation

  • Niu, Yonghong & Han, Shuang & Chi, Zhengyang & Wang, Lingna, 2026. "Effect of La, Ce or Pr modified Dol-C dual-support catalysts on the co-gasification of coal gangue and biomass for the production of hydrogen-rich gas," Renewable Energy, Elsevier, vol. 256(PD).
    • Handle: RePEc:eee:renene:v:256:y:2026:i:pd:s0960148125018452
    DOI: 10.1016/j.renene.2025.124181
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    References listed on IDEAS

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