Green valorization of sweet potato vines: Efficient cellulose extraction and γ-valerolactone recovery via biorefinery platform

文献类型： 外文期刊

第一作者： Li, Yuan

作者： Li, Yuan;Sun, Hongnan;Mu, Taihua;Li, Yuan;Garcia-Vaquero, Marco

作者机构：

关键词： Lignocellulosic biomass; Pretreatment; Fractionation; Cellulose; gamma-Valerolactone; Sodium chloride; Circular economy

期刊名称：CARBOHYDRATE POLYMERS （ 影响因子：12.5； 五年影响因子：11.9 ）

ISSN： 0144-8617

年卷期： 2025 年 367 卷

页码：

收录情况： SCI

摘要： Sweet potato vines, a common agricultural waste during sweet potato harvest, can be a valuable source of lignocellulose. The transformation of these vines into bio-based materials and platform chemicals through a biorefinery process is crucial for turning this promised potential into a practical industrial process. This research developed and optimized a NaCl-catalyzed gamma-valerolactone (GVL) /H2O co-solvent pretreatment process for sweet potato vines. Using optimum conditions (solid-liquid ratio 1:15 (g/mL), 170 degrees C, 4 h, 20 % GVL/H2O, 15 % NaCl) cellulose retention rate was 90.5 % (90.0 % purity, 48.9 % crystallinity), with hemicellulose and lignin removal rates of 94.0 % and 90.0 %, respectively. The lignin (purity 87.5 %, dispersity of 1.05) was recovered by solvent exchange and centrifugation. Compared with commercial microcrystalline cellulose and lignin alkali, the recovered cellulose and lignin had good thermal stability, suitable for further downstream use. A control group experiment confirmed the synergistic effect of NaCl and GVL, with NaCl promoting lignocellulose decomposition. In addition, GVL showed excellent recovery performance with 94.8 % recovery rates and 94.6 % purity after 3 recovery cycles. To summarize, this work presents an ecologically sustainable and environmentally friendly biorefinery technique for effectively utilizing sweet potato vines and other agricultural wastes as source of platform chemicals.

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