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Synergistic effects of La-doped PrFeO3 supported on calcined dolomite for enhanced steam reforming of biomass-derived syngas

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  • Niu, Yonghong
  • Du, Jiazheng
  • Li, Ming
  • Chi, Zhengyang

Abstract

Biomass-derived syngas valorization is critical for sustainable energy transition. This study develops a synergistic catalyst: La-doped PrFeO3 perovskite on calcined dolomite. The dolomite support enables cost-effective macropore tar cracking, while A-site La3+ substitution (LaxPr1-xFeO3) optimizes oxygen vacancy concentration for redox cycling. Experiments in a dual-zone fixed-bed reactor demonstrated that the La:Pr ratio regulated syngas composition, with the La0.6Pr0.4FeO3/CD catalyst achieving a syngas yield of 37.52 mmol/g and a carbon efficiency of 90.50% at a steam-to-biomass ratio of 2.5, thereby increasing the syngas/CO2 ratio from 2.26 (non-catalytic) to 3.22. SEM/BET analyses revealing physical properties with XRD/XPS/FTIR/EPR structural characterization, we confirm that La-doping (x = 0.6) induces lattice expansion and maximizes Fe2+/Pr4+ co-existence, thereby enhancing oxygen mobility via Mars-van Krevelen cycles with switchable CO2/H2O oxidants; integration of these results with gasification data elucidates the synergistic carbon reduction mechanism. Hierarchical catalyst design enables efficient and economical syngas upgrading.

Suggested Citation

  • Niu, Yonghong & Du, Jiazheng & Li, Ming & Chi, Zhengyang, 2026. "Synergistic effects of La-doped PrFeO3 supported on calcined dolomite for enhanced steam reforming of biomass-derived syngas," Renewable Energy, Elsevier, vol. 267(C).
    • Handle: RePEc:eee:renene:v:267:y:2026:i:c:s096014812600618x
    DOI: 10.1016/j.renene.2026.125792
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