文献类型：期刊文献

英文题名：Comparative Evaluation of Organic Acid Pretreatment of Eucalyptus for Kraft Dissolving Pulp Production

作者：Chen, Yuanhang[1,2] Yan, Zhenyun[1] Liang, Long[1] Ran, Miao[1] Wu, Ting[1] Wang, Baobin[2] Zou, Xiuxiu[1] Zhao, Mengke[1] Fang, Guigan[1,2] Shen, Kuizhong[1]

第一作者：Chen, Yuanhang

通信作者：Fang, GG[1];Shen, KZ[1];Fang, GG[2]

机构：[1]Chinese Acad Forestry, Key Lab Biomass Engn & Mat Jiangsu Prov, SAF,Natl Engn Lab Biomass Chem Utilizat, Inst Chem Ind Forest Prod,Key & Open Lab Forest C, Nanjing 210042, Peoples R China;[2]Nanjing Forestry Univ, Coll Light Ind Sci & Engn, Nanjing 210037, Peoples R China

年份：2020

卷号：13

期号：2

外文期刊名：MATERIALS

收录：;EI(收录号：20200908227844);Scopus(收录号：2-s2.0-85079737490);WOS:【SCI-EXPANDED(收录号:WOS:000515499900108)】；

基金：This research was funded by special funds for basic scientific research operating expenses of public welfare research institutes at the central level (CAFYBB2017ZX003-08) and the National Key Research and Development Program of China: High Efficiency Clean Pulping and Functional Product Production Technology Research (Grant Number: 2017YFD0601005).

语种：英文

外文关键词：eucalyptus pretreatment; organic acid; dissolving pulp

摘要：Pretreatment is an essential process for the extensive utilization of lignocellulose materials. The effect of four common organic acid pretreatments for Kraft dissolving pulp production was comparatively investigated. It was found that under acidic conditions, hemicellulose can be effectively removed and more reducing sugars can be recovered. During acetic acid pretreatment, lignin that was dissolved in acetic acid could form a lignin-related film which would alleviate cellulose hydrolysis, while other organic acids caused severe cellulose degradation. Scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR) and X-ray diffractometry (XRD) were used to characterize the pretreated chips in the process. Lignin droplets were attached to the surface of the treated wood chips according to the SEM results. The FTIR spectrum showed that the lignin peak signal becomes stronger, and the hemicellulose peak signal becomes weaker with acid pretreatment. The XRD spectrum demonstrated that the crystallinity index of the wood chips increased. The acetic acid pretreatment process-assisted Kraft process achieved higher yield (31.66%) and higher alpha-cellulose (98.28%) than any other organic acid pretreatment. Furthermore, extensive utilization of biomass was evaluated with the acetic acid pretreatment-assisted Kraft process. 43.8% polysaccharide (12.14% reducing sugar and 31.66% dissolving pulp) and 22.24% lignin (0.29% acetic acid lignin and 21.95% sulfate lignin) were recovered during the process. Biomass utilization could reach 66.04%. Acetic acid pretreatment is a promising process for extensive biomass utilization.