文献类型：期刊文献

英文题名：Hydrothermal CO2-assisted Pretreatment of Wheat Straw for Hemicellulose Degradation Followed with Enzymatic Hydrolysis for Glucose Production

作者：Wang, Ruizhen[1,2] Yue, Jinfang[3] Jiang, Jianchun[1,2] Li, Jing[1,2] Zhao, Jiaping[1,2] Xia, Haihong[1,2] Wang, Kui[1,2] Xu, Junming[1,2]

第一作者：Wang, Ruizhen;王瑞珍

通信作者：Xu, JM[1];Xu, JM[2]

机构：[1]Chinese Acad Forestry, Jiangsu Prov Coinnovat Ctr Efficient Proc & Utili, Jiangsu Prov Key Lab Chem Engn Forest Prod,Natl F, Inst Chem Ind Forest Prod,Key Lab Biomass Energy, Beijing, Peoples R China;[2]Nanjing Forestry Univ, Coinnovat Ctr Efficient Proc & Utilizat Forest Re, Nanjing 210037, Peoples R China;[3]Yangzhou Polytech Inst, Yangzhou, Jiangsu, Peoples R China

年份：2021

卷号：12

期号：3

起止页码：1483-1492

外文期刊名：WASTE AND BIOMASS VALORIZATION

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000538226900001)】；

基金：The research was financially supported by the National Natural Science Foundation of China (31530010, 31870714).

语种：英文

外文关键词：Hydrothermal CO2-assisted pretreatment; Wheat straw; Hemicelluloses degradation; FT-IR; SEM; Enzymatic hydrolysis

摘要：Hydrothermal CO2-assisted pretreatment was carried out for selective degradation of hemicellulose in wheat straw to produce pentose and enhancement the efficiency of enzymatic hydrolysis for glucose production. The FT-IR analysis and HPLC method was adopted to determine the observed chemical composition. Up to 90.0% of hemicelluloses were degraded under the optimum condition with temperature of 200 degrees C, CO2 pressure of 3 MPa and reaction time of 10 min, following with cellulose content in substrate increase from 37.6 to 58.1%. The efficiency of enzymatic hydrolysis was significantly improved after pretreatment, attributing to the loose structure of lignocelluloses after hemicellulose removal. More than 72.7% of glucose was achieved after enzymatic hydrolysis, by contrast, while the untreated sample was merely 30.2% due to enzymatic indigestibility. Additionally, SEM observations demonstrated that the densified structure of substrate was destructed, enhancing the accessibility and absorption of enzymes in the hydrolysis processing. The current results indicated that the hydrothermal CO2-assisted pretreatment was a feasible and effective approach for pretreatment of lignocellulosic biomass.