Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, CAS Key Laboratory of Renewable Energy, Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development, Guangzhou 510640, China.
College of Forestry and Landscape Architecture, South China Agricultural University, Guangzhou 510642, China.
Bioresour Technol. 2018 Jan;247:705-710. doi: 10.1016/j.biortech.2017.09.159. Epub 2017 Sep 23.
Here, the potential use of herbal residues of Akebia as feedstock for ethanol production is evaluated. Additionally, five deep eutectic solvents from hemicellulose-derived acids were prepared to overcome biomass recalcitrance. Reaction temperatures had more significant influences on solid loss and chemical composition than the molar ratios of choline chloride (ChCl) to derived acids. Glycolic acid resulted in the maximum levels of lignin, xylan and glucan removal, which were 60.0%, 100% and 71.5%, respectively, at 120°C with a 1:6M ratio of ChCl-glycolic acid. In contrast, ChCl-formic acid resulted in the greatest level of glucan retention, at 97.8%, with a lignin removal rate of 40.7% under the same pretreatment conditions. Moreover, ChCl loading could significantly enhance the selectivity of carboxylic acid for lignin dissolution. A 98.0% level of subsequent enzymatic saccharification and a 100% ethanol yield were achieved after ChCl-formic acid pretreatments of Akebia' herbal residues.
在此，评估了将木通属植物残渣用作乙醇生产原料的潜力。此外，还制备了 5 种源自半纤维素酸的深共晶溶剂，以克服生物质的抗降解性。反应温度对固形物损失和化学成分的影响比氯化胆碱（ChCl）与衍生酸的摩尔比更为显著。在 120°C 下，当 ChCl-甘醇酸的摩尔比为 1:6 时，甘醇酸导致木质素、木聚糖和葡聚糖的去除率最高，分别为 60.0%、100%和 71.5%。相比之下，在相同的预处理条件下，ChCl-甲酸导致最高的葡聚糖保留率，为 97.8%，木质素去除率为 40.7%。此外，ChCl 负载可以显著提高羧酸对木质素溶解的选择性。在用 ChCl-甲酸预处理木通属植物残渣后，可实现后续酶解的 98.0%转化率和 100%的乙醇产率。
