文献类型：期刊文献

英文题名：Valorization of bamboo biomass using combinatorial pretreatments

作者：Huang, Chen[1,2] Zhan, Yunni[1] Wang, Jia[2,3] Cheng, Jinyuan[1] Meng, Xianzhi[3] Liang, Luna[3] Liang, Fangmin[1] Deng, Yongjun[1] Fang, Guigan[1,2] Ragauskas, Arthur J.[3,4,5]

第一作者：黄晨;Huang, Chen

通信作者：Deng, YJ[1];Fang, GG[1];Fang, GG[2];Ragauskas, AJ[3];Ragauskas, AJ[4];Ragauskas, AJ[5]|[a000589b6171897e30b38]房桂干;

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, Coinnovat Ctr Efficient Proc & Utilizat Forest Re, Nanjing 210037, Peoples R China;[3]Univ Tennessee, 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：2022

卷号：24

期号：9

起止页码：3736-3749

外文期刊名：GREEN CHEMISTRY

收录：;EI(收录号：20221912079164);Scopus(收录号：2-s2.0-85129538756);WOS:【SCI-EXPANDED(收录号:WOS:000782259300001)】；

基金：This research was supported by the Jiangsu Province Key Laboratory of Biomass Engineering and Materials (JSBEM-S-202004), the Young Elite Scientist Sponsorship Program by CAST, the National Natural Science Foundation for Youth (32001273) and the Fundamental Research Funds for the Central Non-profit Research Institution of CAF (No. CAFYBB2021ZI001-01).

语种：英文

外文关键词：Bamboo - Biomass - Cellulose - Chemical analysis - Delignification - Saccharification - Sodium hydroxide

摘要：Current studies concerning liquid hot water pretreatment (LHWP) usually focus on cellulose saccharification or hemicellulose conversion, while the appropriate extraction and utilization of LHWP-induced lignin have not been addressed. To valorize whole biomass, herein, a series of LHWP-based combinatorial pretreatments are proposed using advanced solvent systems. The first LHWP stage removed 73.74% of xylan at the optimized pretreatment severity (similar to 4.0), at the same time preserving almost all the cellulose and lignin. As a result, 9.04 g L-1 xylo-oligosaccharides (XOSs) were obtained in the prehydrolyzate, representing 63.31% of the degraded xylan. The LHWP also caused the migration and partial degradation of the lignin which benefits the delignification in the second stage of pretreatment utilizing NaOH, deep eutectic solvent (DES) and 1,4-butanediol (BDO) under relatively mild conditions. The proposed combinatorial pretreatment significantly enhanced glucan conversion. The physiochemical structural properties of the untreated and pretreated substrates were investigated with XRD, FTIR, GPC, SEM, and Simons' staining to understand the mechanisms of different combinatorial pretreatments for overcoming biomass recalcitrance and facilitating integrated biomass valorization. Finally, the physical and chemical properties of the regenerated lignins were analyzed. The results revealed that lignins from LHWP-NaOH pretreatment preserved most of the native beta-O-4 structure (37.1%). Thus it could be used as an ideal method for the catalytic production of aromatic monomers. On the other hand, LHWP-DES pretreatment generated lignins with low molecular weight and high phenolic OH content, which is promising for synthesizing resins and antioxidants. In conclusion, the proposed combinatorial pretreatment established a reliable sequential pretreatment methodology for maximizing the output of bamboo biomass and may fit into different biorefinery configurations for various value-added products.