Efficient fractionation of lignocellulosic biomass with in-situ generated diformylxylose as renewable solvent

IF 9 1区环境科学与生态学 Q1 AGRICULTURAL ENGINEERING

Bioresource Technology Pub Date : 2025-10-08 DOI:10.1016/j.biortech.2025.133452

Xianqing Lv, Zhuonan Zhang, Zhenggang Gong, Guangxu Yang, Li Shuai

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Abstract

Development of sustainable solvents for biomass biorefining remains a pivotal challenge of green chemistry. This study presented a circular biorefining strategy that valorized hemicelluloses into biobased solvent diformylxylose (DFX; Hansen solubility parameter: 21.4 MPa^−1/2) for acetal-protection pretreatment. The DFX-H₂O cosolvent system (90/10, w/w), with addition of formaldehyde and HCl, showed a decent yield of acetal-protected lignin (84.7%) and enzymatic conversion of acetal-protected cellulose after deprotection by acid hydrolysis (82.9%). Crucially, hemicelluloses-derived xylose was concurrently converted into additional DFX in situ during pretreatment, sustaining the delignification process. The spent DFX (including newly formed) was effectively recovered by crystallization and the isolated acetal-protected lignin was upgraded to monomers via hydrogenolysis at near-theoretical yields (46.5%). This work demonstrates a self-reinforcing cycle where a biomass component is transformed into the key solvent enabling efficient fractionation.

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用原位生成的二甲酰木糖作为可再生溶剂对木质纤维素生物质进行高效分馏

生物质生物精炼用可持续溶剂的开发仍然是绿色化学面临的关键挑战。本研究提出了一种循环生物精制策略，将半纤维素转化为生物基溶剂二甲酰木糖（DFX； Hansen溶解度参数：21.4 MPa−1/2），用于缩醛保护预处理。在DFX-H2O共溶剂体系（90/10,w/w）中，甲醛和HCl的加入使乙酰保护木质素的产率达到84.7%，酸水解脱保护后乙酰保护纤维素的酶转化率达到82.9%。至关重要的是，在预处理过程中，半纤维素衍生的木糖同时在原位转化为额外的DFX，维持去木质素过程。废DFX（包括新形成的）通过结晶有效回收，分离的缩醛保护木质素通过氢解升级为单体，收率接近理论水平（46.5%）。这项工作展示了一个自我强化的循环，其中生物质成分转化为关键溶剂，从而实现有效的分馏。

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来源期刊

Bioresource Technology 工程技术-能源与燃料

CiteScore

20.80

自引率

19.30%

发文量

2013

审稿时长

12 days

期刊介绍： Bioresource Technology publishes original articles, review articles, case studies, and short communications covering the fundamentals, applications, and management of bioresource technology. The journal seeks to advance and disseminate knowledge across various areas related to biomass, biological waste treatment, bioenergy, biotransformations, bioresource systems analysis, and associated conversion or production technologies. Topics include: • Biofuels: liquid and gaseous biofuels production, modeling and economics • Bioprocesses and bioproducts: biocatalysis and fermentations • Biomass and feedstocks utilization: bioconversion of agro-industrial residues • Environmental protection: biological waste treatment • Thermochemical conversion of biomass: combustion, pyrolysis, gasification, catalysis.