Scalable Extraction of High-Purity Hemicellulose from Biomass via Urea-Assisted Tetramethylammonium Hydroxide and Membrane Separation.

IF 6.6 2区 化学 Q1 CHEMISTRY, MULTIDISCIPLINARY
ChemSusChem Pub Date : 2025-09-30 DOI:10.1002/cssc.202501780
Meng Liu, Guoqiang Han, Yaxu Sun, Lei Zhang, Qi Tang, Kaixia Liang, Qinqin Xia, Shuo Dou, Xiaoxue Song, Haipeng Yu, Yongzhuang Liu
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引用次数: 0

Abstract

Efficient fractionation of hemicellulose from lignocellulosic biomass is vital for its valorization. In this study, corncob is first used as a model feedstock due to its well-structured lignocellulosic composition. Through systematic optimization of parameters such as alkali concentration, temperature, reaction time, alkali type, and cosolvent, tetramethylammonium hydroxide (TMAH) is identified as the best choice for isolating hemicellulose with high purity. By further implementing optimized conditions (80 °C for 1 h), a urea-assisted TMAH system (comprising 6 wt% TMAH and 10 wt% urea) achieves a 74.94% extraction yield of high-purity hemicellulose (85.7%) from corncob. The versatility of this system is then confirmed by its ability to dissolve hemicellulose from various biomass sources, including Chinese fir, poplar, and bamboo. Additionally, integrating membrane separation within the TMAH-urea system enables scalable fractionation, significantly cutting down acid consumption and antisolvent use by at least 80%. A 500-fold scale-up maintains a close yield of 70.14%. The solvent system exhibits excellent recyclability, sustaining a yield of 64.74% after three recycling cycles. This research highlights the essential roles of alkaline platforms and membrane technology in the industrial production of high-purity hemicellulose.

尿素辅助四甲基氢氧化铵-膜分离萃取生物质中高纯度半纤维素。
从木质纤维素生物质中高效分离半纤维素对其增值至关重要。在这项研究中,由于玉米芯结构良好的木质纤维素成分,玉米芯首次被用作模型原料。通过对碱浓度、温度、反应时间、碱类型、助溶剂等参数的系统优化,确定了四甲基氢氧化铵(TMAH)是分离高纯度半纤维素的最佳选择。通过进一步优化条件(80°C, 1 h),尿素辅助TMAH系统(含6 wt% TMAH和10 wt%尿素)可从玉米芯中提取高纯度半纤维素(85.7%),提取率为74.94%。该系统的多功能性通过其溶解来自各种生物质来源的半纤维素的能力得到证实,包括杉木,杨树和竹子。此外,在tmah -尿素系统中集成膜分离可以实现可扩展的分馏,显着减少酸消耗和抗溶剂使用至少80%。规模扩大500倍后,收益率仍接近70.14%。该溶剂体系具有良好的可回收性,三次循环后收率保持在64.74%。本研究强调了碱性平台和膜技术在高纯度半纤维素工业生产中的重要作用。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
ChemSusChem
ChemSusChem 化学-化学综合
CiteScore
15.80
自引率
4.80%
发文量
555
审稿时长
1.8 months
期刊介绍: ChemSusChem Impact Factor (2016): 7.226 Scope: Interdisciplinary journal Focuses on research at the interface of chemistry and sustainability Features the best research on sustainability and energy Areas Covered: Chemistry Materials Science Chemical Engineering Biotechnology
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