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Ethanol-Assisted Hydrothermal Liquefaction of Poplar Using Fe-Co/Al 2 O 3 as Catalyst

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  • Haijun Wu

    (Biochemical Engineering Research Center, Anhui University of Technology, Ma’anshan 243032, China
    School of Chemistry and Chemical Engineering, Anhui University of Technology, Ma’anshan 243032, China)

  • Usama Shakeel

    (Biochemical Engineering Research Center, Anhui University of Technology, Ma’anshan 243032, China
    School of Chemistry and Chemical Engineering, Anhui University of Technology, Ma’anshan 243032, China)

  • Quan Zhang

    (Biochemical Engineering Research Center, Anhui University of Technology, Ma’anshan 243032, China
    School of Chemistry and Chemical Engineering, Anhui University of Technology, Ma’anshan 243032, China)

  • Kai Zhang

    (Biochemical Engineering Research Center, Anhui University of Technology, Ma’anshan 243032, China
    School of Chemistry and Chemical Engineering, Anhui University of Technology, Ma’anshan 243032, China)

  • Xia Xu

    (Biochemical Engineering Research Center, Anhui University of Technology, Ma’anshan 243032, China
    School of Chemistry and Chemical Engineering, Anhui University of Technology, Ma’anshan 243032, China)

  • Jian Xu

    (Biochemical Engineering Research Center, Anhui University of Technology, Ma’anshan 243032, China
    School of Chemistry and Chemical Engineering, Anhui University of Technology, Ma’anshan 243032, China)

Abstract

Although the conversion of lignocellulosic biomass into bio-oil with high yield/quality through hydrothermal liquefaction (HTL) is promising, it still faces many challenges. In this study, a Fe x -Co (1-x) /Al 2 O 3 catalyst was prepared with the coprecipitation method and low-content ethanol was used as the cosolvent for the HTL of poplar. The results showed that the Fe x -Co (1-x) /Al 2 O 3 catalyst significantly promoted the yield and energy recovery rate (ERR) of bio-oil compared with the control (10% ethanol content). At 260 °C for 30 min, 60Fe-40Co/Al 2 O 3 had the best catalytic effect, achieving the highest bio-oil yield (67.35%) and ERR (93.07%). As a multifunctional bimetallic catalyst, Fe x -Co (1-x) /Al 2 O 3 could not only increase the degree of hydrogenation deoxidization of the product but also promote the diversity of phenolic compounds gained from lignin. The bio-oil obtained from HTL with Fe x -Co (1-x) /Al 2 O 3 as catalyst contained lower heterocyclic nitrogen, promoting the transfer of more bio-oil components to substances with lower boiling point.

Suggested Citation

  • Haijun Wu & Usama Shakeel & Quan Zhang & Kai Zhang & Xia Xu & Jian Xu, 2022. "Ethanol-Assisted Hydrothermal Liquefaction of Poplar Using Fe-Co/Al 2 O 3 as Catalyst," Energies, MDPI, vol. 15(9), pages 1-16, April.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:9:p:3057-:d:799311
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    References listed on IDEAS

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