Guangxi Key Laboratory of Clean Pulp & Papermaking and Pollution Control, College of Light Industry and Food Engineering, Guangxi University, Nanning 530004, PR China; Engineering Research Center for Sugar Industry and Comprehensive Utilization, Ministry of Education, Nanning 530004, PR China.
Guangxi Key Laboratory of Clean Pulp & Papermaking and Pollution Control, College of Light Industry and Food Engineering, Guangxi University, Nanning 530004, PR China.
Bioresour Technol. 2024 Dec;413:131482. doi: 10.1016/j.biortech.2024.131482. Epub 2024 Sep 11.
Sugarcane bagasse (SCB) has a recalcitrant structure, which hinders its component dismantling and subsequent high value utilization. Some organic solvents are favorable to dismantle lignocellulose, but their high viscosity prevents separation of components and reuse of solvents. Herein, ethylene glycol phenyl ether (EGPE)-acid system is used as an example to develop green and efficient methods to dismantle SCB, purify polysaccharides and lignin, and reuse solvents. Results show that dismantling SCB at 130 °C, 0.5 % HSO, and 100 min can obtain 85.5 % cellulose recovery, 94.1 % hemicellulose removal and 83.7 % lignin removal. Different molecular weight saccharides are separated by membranes filtration and centrifugation, and lignin recovered by antisolvent precipitation. The solvent recovered by distillation, achieving high dismantling efficiency of 89.2 % cellulose recovery, 94.1 % hemicellulose removal and 94.4 % lignin removal after four recycles. Results show a promising approach for the closed-loop process of dismantling lignocellulose, fractionating saccharides, and reusing solvents in high-viscosity systems.
甘蔗渣（SCB）具有顽固的结构，这阻碍了其成分的拆卸和随后的高值利用。一些有机溶剂有利于拆卸木质纤维素，但它们的高粘度阻止了成分的分离和溶剂的重复使用。在此，以乙二醇苯醚（EGPE）-酸体系为例，开发了绿色高效的方法来拆卸 SCB、纯化多糖和木质素，并重复使用溶剂。结果表明，在 130°C、0.5%HSO 和 100min 的条件下，SCB 的拆卸可获得 85.5%的纤维素回收率、94.1%的半纤维素去除率和 83.7%的木质素去除率。通过膜过滤和离心分离不同分子量的糖，并用反溶剂沉淀回收木质素。通过蒸馏回收溶剂，在 4 次循环后，纤维素回收率达到 89.2%、半纤维素去除率达到 94.1%、木质素去除率达到 94.4%，拆卸效率很高。结果表明，这为高粘度体系中木质纤维素的拆卸、糖的分级和溶剂的再利用的闭环过程提供了一种很有前途的方法。
