Fractionation of cornstalk by alkali-catalyzed organosolv pretreatment to monosaccharides and high-valued lignin
作者单位：College of Biotechnology and Pharmaceutical Engineering Nanjing Tech University
会议名称：《中国生物工程学会第十届学术年会暨2016年全国生物技术...》
会议日期：2016年
学科分类：080703[工学-动力机械及工程] 082903[工学-林产化学加工工程] 08[工学] 0807[工学-动力工程及工程热物理] 0829[工学-林业工程]
关 键 词：Alkali-catalyzed organosolv pretreatment Cornstalk Enzymatic hydrolysis Butanol Lignin
摘 要：Fractionation of cornstalk into carbohydrate(cellulose and hemicellulose) and lignin, was carried out using alkali-catalyzed organosolv pretreatment(ACOS). The processing parameters in the pretreatment process were optimized. More than 85% of total lignin was removed with low amounts of hemicellulose degradation under the following conditions: 110℃, 0.4%(w/v) NaOH, 90 min reaction time, and 60%(v/v) Et OH. The maximum recovery of total monosaccharide(81%)(cellulose/79%, hemicellulos/84%) was obtained at the combined severity factor value of(CSF = 4.15). The physical structure and chemical properties of alkali-catalyzed organosolv lignin(ACOSL) were analyzed. Results suggested that ACOSL showed intact structure compared to alkali lignin.