 Two-stage catalytic upgrading of volatiles from pine sawdust pyrolysis to boost hydrocarbon-rich bio-oilKaiqiang Huang, Yahui Xiao, Shaoping Xu, Junwang Zhang and Lijun Du Renewable Energy, 2025, vol. 243, issue C Abstract: A process of biomass pyrolysis coupled with two stages of catalytic bio-oil upgrading to obtain hydrocarbon-rich bio-oil has been proposed. The pyrolysis of pine sawdust was conducted at 500 °C in a free-fall reactor. The upgrading was carried out in a fixed-bed reactor downstream the free-fall reactor. With CeMnOx/Al2O3 as catalyst, the oxygen-containing compounds in the volatiles of biomass pyrolysis were partially deoxygenated and converted into hydrocarbon precursors by the first-stage upgrading. The precursors were further deoxygenated and reformed into hydrocarbon-rich bio-oil through the second-stage upgrading with HZSM-5 catalyst. Specifically, the first stage upgrading and the second stage upgrading were operated under different temperatures. Under the mass ratio of CeMnOx/Al2O3: HZSM-5: sawdust of 10:10:1 g/g/(g/min), the first-stage upgrading temperature of 500 °C and the second-stage upgrading temperature 600 °C, a bio-oil containing only light oil with 74.0 % hydrocarbons and 21.5 % oxygenated compounds has been obtained. Keywords: Biomass pyrolysis; Two-stage upgrading; Catalytic deoxygenation; Bio-oil; Hydrocarbon (search for similar items in EconPapers) Downloads: (external link) Related works: Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text Persistent link: https://EconPapers.repec.org/RePEc:eee:renene:v:243:y:2025:i:c:s0960148125001727 DOI: 10.1016/j.renene.2025.122510 Access Statistics for this article Renewable Energy is currently edited by Soteris A. Kalogirou and Paul Christodoulides More articles in Renewable Energy from Elsevier |
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