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Catalytic pyrolysis of biomass using desulfurization ash: Enhanced bio-oil yields and reaction pathway modulation

Author

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  • An, Xinyuan
  • Tang, Chuyang
  • Liu, Jiaqi
  • Song, Xuan
  • Huang, Chunhong

Abstract

This study investigates the use of desulfurization ash (DA), an economical solid waste by-product, as a catalyst in corn cob (CON) pyrolysis to improve bio-oil and syngas yields. The effects of varying DA-to-CON ratios on pyrolysis product distribution were examined using TGA, XRD, XRF, and GC-MS. DA catalysis modified pyrolysis reaction pathways, reducing water and gas yields while enhancing bio-oil production and the generation of high-value phenolic compounds such as phenols and pyridines. It promoted the conversion of lignin and cellulose into aromatic hydrocarbons and oxygenated compounds, lowering the oxygen content of bio-oil. Additionally, secondary reactions, including decarbonylation and dehydroxylation, produced low-molecular-weight free radicals, further improving product quality. The results demonstrate DA's potential as a sustainable catalyst for biomass pyrolysis, advancing waste valorization and bioenergy development.

Suggested Citation

  • An, Xinyuan & Tang, Chuyang & Liu, Jiaqi & Song, Xuan & Huang, Chunhong, 2025. "Catalytic pyrolysis of biomass using desulfurization ash: Enhanced bio-oil yields and reaction pathway modulation," Energy, Elsevier, vol. 330(C).
    • Handle: RePEc:eee:energy:v:330:y:2025:i:c:s0360544225024594
    DOI: 10.1016/j.energy.2025.136817
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