中国造纸学报Issue(1)：1-6,6.
大豆秸秆乙醇预处理脱木素动力学研究
Delignification Kinetics of Ethanol Pretreatment of Soybean Stalk
摘要
Abstract
It is an essential step to destroy the structure of the cell wall by pretreatment before enzymatic hydrolysis for the conversion of lignocellulose to ethanol.Ethanol pretreatment has many advantages,and is a hot research topic in recent years.In this experiment,soybean stalk was pretreated under the following condition:heat preservation temperature 170℃,holding time 90 min,ethanol concentration 50％.The component analysis of pretreated material indicated that the hemicellulose and lignin in soybean stalk were mainly removed by ethanol pretreatment (The removal ratio reached 82.9％ and 62.0％ respectively).Delignification reaction during ethanol pretreatment was a first order reaction.The kinetics study showed that there were two delignification stages i.e.bulk delignification and supplement delignification when the temperature was above 160℃.Lignin was removed 87.9％ and 12.1％ respectively in the two steps when the temperature was 170℃.The removed lignin in the two stages had different molecular weight (Mw =9101 and 12961).In these two delignification stages,lignin removal rate in bulk delignification stage was higher (Kbulk =4 × 10-4 s-1 ＞ ksupplement =4 × 10-5 s-1).关键词
大豆秸秆/乙醇预处理/脱木素/动力学Key words
soybean stalk/ethanol pretreatment/delignification/kinetics分类
轻工纺织引用本文复制引用
樊富广,涂洪峰,陈从鑫,姚兰,杨海涛..大豆秸秆乙醇预处理脱木素动力学研究[J].中国造纸学报,2017,(1):1-6,6.基金项目
国家自然科学基金(31500496) （31500496）
湖北省教育厅重点项目(D20161402) （D20161402）
制浆造纸科学与技术教育部重点实验室开放基金(KF201611,KF-201409). （KF201611,KF-201409）
