文献类型：期刊文献

英文题名：A tailored deep eutectic solvent for high-yield conversion of poplar residues to bio-based building blocks at mild conditions

作者：Zhou, Xuelian[1,2] Liu, Xuze[1] Zhan, Yunni[1] Bian, Huiyang[2] Wu, Shufang[2] Dai, Hongqi[2] Liang, Fangmin[1] Meng, Xianzhi[3] Huang, Chen[1,2] Fang, Guigan[1,2] Ragauskas, Arthur J.[3,4,5]

第一作者：Zhou, Xuelian

通信作者：Huang, C[1];Fang, GG[1];Huang, C[2];Fang, GG[2]

机构：[1]Chinese Acad Forestry, Inst Chem Ind Forest Prod, Jiangsu Prov Key Lab Biomass Energy & Mat, Nanjing 210042, Peoples R China;[2]Nanjing Forestry Univ, Jiangsu Coinnovat Ctr Efficient Proc & Utilizat Fo, Int Innovat Ctr Forest Chem & Mat, Nanjing 210037, Peoples R China;[3]Univ Tennessee Knoxville, Dept Chem & Biomol Engn, Knoxville, TN 37996 USA;[4]Univ Tennessee, Inst Agr, Ctr Renewable Carbon, Dept Forestry Wildlife & Fisheries, Knoxville, TN 37996 USA;[5]Oak Ridge Natl Lab, Joint Inst Biol Sci, Biosci Div, Oak Ridge, TN 37831 USA

年份：2024

卷号：487

外文期刊名：CHEMICAL ENGINEERING JOURNAL

收录：;EI(收录号：20241315815648);Scopus(收录号：2-s2.0-85188612536);WOS:【SCI-EXPANDED(收录号:WOS:001223415600001)】；

基金：This work was supported by the National Natural Science Foundation of China (Grant No. 32301546, 22078162, 32371821) , the Natural Science Foundation of Jiangsu Province (Grant No. BK20230405) , Fundamental Research Funds of CAF (CAFYBB2023QA006) , and the Taishan industry -leading talents project special funds (tacy20200213) . Sincerely thank Dr. Shilong Yang, Dr. Fan Su, and Dr. Xiaoyue Ji at Nanjing Forestry University for their help with NMR, XRD, and GC -MS analysis. AJR and XM efforts were sponsored by the University of Tennessee, Knoxville.

语种：英文

外文关键词：Acidic deep eutectic solvent; Hemicellulose; Pseudo -lignin; Lignin condensation; Enzymatic hydrolysis

摘要：The generation of condensed compounds in a deep eutectic solvent (DES) pretreatment has become a paramount factor that inhibits the further conversion of pretreated cellulose-rich substrate. This study proposed a novel three-constituent DES system for the value-added utilization of poplar residues by efficiently suppressing hemicellulose derived condensation reactions. The results showed that adding ethanol into the DES system could effectively deconstruct the recalcitrant structure of poplar residues, simultaneously hindering the condensed composition formation. Under optimum ethanol addition (30%), the maximum xylan and lignin removal of 87.94% and 90.99% could be achieved, with more than 90.47% of glucan being preserved. With this, the glucan enzymatic hydrolysis efficiency was remarkably improved to 100% under the pretreatment conditions of 100 degrees C for 60 min, which was 84.69 times higher than the regular DES-pretreated poplar residues (1.17%). The working mechanism of relieving condensation reactions was characterized by Py-GC - MS, NMR, SEM, FTIR, and others. The results demonstrated that the addition of ethanol could regulate the degradation/conversion pathway of hemicellulose and lignin precipitation, thus inhibit the formation of condensed compounds during the pretreatment.