Comparison of Dilute Organic Acid Pretreatment and a Comprehensive Exploration of Citric Acid Pretreatment on Corn Cob  

作　　者：Hui Qiao Jingzhao Cui Shuiping Ouyang Jinjie Shi Jia Ouyang 

机构地区：[1]College of Chemical Engineering,Nanjing Forestry University,Nanjing,210037,China [2]College of Forestry,Nanjing Forestry University,Nanjing,210037,China [3]Key Laboratory of Forest Genetics and Biotechnology of the Ministry of Education,Nanjing Forestry University,Nanjing,210037,China

出　　处：《Journal of Renewable Materials》2019年第11期1197-1207,共11页可再生材料杂志（英文）

基　　金：by the National Key Research and Development Program of China(2018YFA0902200);the National Natural Science Foundation of China(51561145015);the Major Program of the Natural Science Foundation of Jiangsu Higher Education of China(16KJA220004).

摘　　要：As an important agricultural waste,corn cob is one of the most abundant lignocellulosic biomass.In this work,dilute acid pretreatment using seven different organic acids were compared for compositional analysis of corn cob.The first pKa of organic acids,influenced by the number and type of the side group and distance between two carboxylic groups,played a crucial role in the pretreatment effect.Citric acid was found to have better pretreatment performance than other tested dicarboxylic acids.Under the condition of 30 mM,160°C and 60 min,the level of xylose reached 22.64 g/L in pretreatment liquid,and the pretreated corn cob demonstrated the high enhancement of enzymatic hydrolysis up to 93.4%and the ethanol yield was 73.6%.

关 键 词：Corn cob organic acid pretreatment citric acid enzymatic hydrolysis bio-ethanol production 

分 类 号：O62[理学—有机化学]