Alkaline tetrahydrofurfuryl alcohol pretreatment technology to achieve value-added co-liquefaction of biomass

Haijun Wu, Biao Wang, Fanhui Geng, Kai Zhang, Quanwei Lv and Jian Xu

Renewable Energy, 2025, vol. 239, issue C

Abstract: Although it is promising to convert biomass into high yield/high quality bio-oil through hydrothermal liquefaction (HTL), it still faces many challenges. Hence, a novel approach was proposed here to improve the yield and quality of bio-oil. The effect of alkaline tetrahydrofurfuryl alcohol (ATA) pretreatment on the preparation of bio-oil from walnut shell (WS) adopting isopropanol/water co-liquefaction was studied. By optimizing the concentration of pretreatment alkali, the ratio of liquefied solvent, reaction temperature and residence time, the results indicated that a 50/50 co-solvent ratio had the best liquefaction effect. Under conditions of 280 °C, 30 min, and 1%-ATA, the maximum yield and energy recovery rate (ERR) of total bio-oil were 62.76 % and 34.07 %, respectively. Various high-sensitivity characterization techniques were used to analyze the physicochemical properties of WS pretreatment and liquefaction products, confirming that ATA pretreatment effectively breaks the structural barrier of WS and promotes its conversion to bio-oil.

Keywords: Alkaline tetrahydrofurfuryl alcohol; Walnut shells; Pretreatment; Liquefaction; Bio-oil (search for similar items in EconPapers)
Date: 2025
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Persistent link: https://EconPapers.repec.org/RePEc:eee:renene:v:239:y:2025:i:c:s0960148124021657

DOI: 10.1016/j.renene.2024.122097

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