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

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

Energy, 2025, vol. 330, issue C

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.

Keywords: Desulfurization ash; Corn cob; Free radical reaction; Sustainable catalysis (search for similar items in EconPapers)
Date: 2025
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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:330:y:2025:i:c:s0360544225024594

DOI: 10.1016/j.energy.2025.136817

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