In-situ hydrodeoxygenation of heavy bio-oil over Ce/Fe-based catalysts on different carriers in methanol solvent

Meiling Yang, Hanqing Liang, Qihe Yuan, Sheng Yao and Cuiping Wang

Energy, 2025, vol. 320, issue C

Abstract: Hydrodeoxygenation (HDO) is necessary for bio-oil upgrading, but developing high-activity, high-stability and low-cost catalysts remains a major challenge. In this work, Ce/Fe-based components loaded on different carriers (steel wire mesh, high-silica cloth, alumina pellets, honeycomb activated carbon, and ceramic fiber ropes) were prepared for the in situ HDO of heavy bio-oil with methanol as the hydrogen source in a high-pressure reactor. The carrier swirling with the agitator increased the effective collisions between bio-oil vapor, methanol and the catalyst to upgrade the bio-oil. The results showed that Oil-Fe-Ce/304L performed well in terms of yield (70.1 wt%), elemental composition (O/C decreased by 8.46 %, and H/C increased by 19.05 %), and component composition (beneficial compounds such as alcohols, esters, and hydrocarbons increased). From the XRD diffraction peaks, the FeO contained in Fe-Ce/304L was oxidized to Fe3O4 after HDO, thus Fe-Ce/304L performed both oxygen-carrying and catalytic functions for the bio-oil upgrading, the swirling carrier of 304L wire mesh expanded the catalyst performance of bio-oil HDO. Fe-Ce/304L showed a good cycling effect on the completion of the oxygen-carrying function and bio-oil HDO, and might be more suitable to the bio-oil HDO processes, the responding 3rd oil-Fe-Ce/304L maintained a higher heating value (HHV) (36.22 MJ/kg).

Keywords: Crude heavy bio-oil; In situ HDO; Catalysts carrier; High-pressure reactor; Methanol solvent (search for similar items in EconPapers)
Date: 2025
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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:320:y:2025:i:c:s0360544225010801

DOI: 10.1016/j.energy.2025.135438

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