文献类型：期刊文献

英文题名：Stepwise separation of poplar wood in oxalic acid/water and gamma-valerolactone/water systems

作者：Song, Liuming[1] Wang, Ruizhen[2] Jiang, Jianchun[2] Xu, Junming[2] Gou, Jinsheng[1]

第一作者：Song, Liuming

通信作者：Gou, JS[1];Xu, JM[2]

机构：[1]Beijing Forestry Univ, Coll Mat Sci & Technol, Key Lab Wooden Mat Sci & Applicat, Minist Educ, Beijing 100083, Peoples R China;[2]Chinese Acad Forestry, Inst Chem Ind Forest Prod, Natl Engn Lab Biomass Chem Utilizat, Key & Open Lab Forest Chem Engn,SFA,Key Lab Bioma, Nanjing 210042, Peoples R China

年份：2020

卷号：10

期号：19

起止页码：11188-11199

外文期刊名：RSC ADVANCES

收录：;EI(收录号：20201408374705);Scopus(收录号：2-s2.0-85082547909);WOS:【SCI-EXPANDED(收录号:WOS:000523640500024)】；

基金：This work was financially supported by the National Natural Science Foundation of China (31530010) and Fundamental Research Funds for Central Universities (2017ZY32).

语种：英文

摘要：A cost-efficient methodology was developed for a two-step removal of hemicellulose from lignocellulosic biomass, thereby yielding C5 sugars, further separated residue, and high purity cellulose as well as lignin. In the first step of the process, an oxalic acid (OA)-assisted hydrolysis pretreatment was conducted for the selective decomposition of hemicellulose to C5 sugars. The optimized process conditions were as follows: temperature: 160 degrees C, OA concentration: 1%, holding time: 10 min. Under these conditions, various monosaccharides and other intermediates were obtained and more than 98.32% of the hemicellulose was removed from the original poplar. In the second step of the process, to extract lignin, a low concentration of sulfuric acid was used as a catalyst during the treatment of samples in a gamma-valerolactone/H2O system; more than 91.57% lignin was removed, 82.99% cellulose was retained in the solid cellulose-rich substrates, and 94.45% (i.e., high-purity) cellulose was obtained. This method can be used for efficient fractionation of hemicellulose, cellulose, and lignin with the aim of achieving high value utilization of the entire biomass.