Polyethylene glycol-driven lignin-first biorefinery: A pathway for efficient conversion of lignocellulose to ethanol, furfural, and lignin-derived solid electrolytes

文献类型： 外文期刊

第一作者： Song, Guojie

作者： Song, Guojie;Hu, Wenhao;Wu, Qun;Madadi, Meysam;Sun, Chihe;Sun, Fubao;Zhang, Ezhen;Gupta, Vijai Kumar;Gupta, Vijai Kumar

作者机构：

关键词： Biorefinery; Lignin-first pretreatment; Surfactant modification; Non-productive binding; PEGylated lignin

期刊名称：CHEMICAL ENGINEERING JOURNAL （ 影响因子：13.2； 五年影响因子：13.5 ）

ISSN： 1385-8947

年卷期： 2025 年 515 卷

页码：

收录情况： SCI

摘要： The urgent transition to sustainable energy sources emphasizes the necessity for the holistic valorization of lignocellulosic biomass to develop high-performing biorefineries. Traditional pretreatment approaches often encounter challenges in achieving efficient carbohydrate conversion and high-quality lignin fractionation. This study presents a novel lignin-first biorefinery approach integrating polyethylene glycol (PEG) into AlCl3/1,4butanediol pretreatment, facilitating in-situ lignin modification and enhancing carbohydrate conversion efficiency. Notably, the optimized process achieves 91.1 % cellulose retention, 86.0 % xylan removal, and 80.2 % delignification. The advanced biorefinery process yields a 14 % increase in glucose yield through enzymic hydrolysis of cellulose, followed by fermentation recording an ethanol titer of 45.1 g/L. The enhanced cellulose-toglucose conversion and ethanol yield are attributed to PEG grafting onto lignin, which minimizes non-productive cellulase binding to lignin in the cellulose-riched solid. Concurrently, AlCl3 effectively catalyzes the conversion of xylan to furfural, ensuring high yields of 51.0 %. Moreover, PEGylated lignin demonstrates improved performance in lithium-ion batteries by enhancing ionic conductivity by forming a hybrid polymer that combines lignin's structural stability with PEG's flexibility. This modification facilitates efficient ion transport, reducing battery resistance and enhancing overall performance. This innovative strategy optimizes carbohydrate hydrolyzability and promotes lignin valorization, paving the way for economic advancements in lignin-first biorefineries and promising sustainable energy solutions.

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