林产化学与工业2012，Vol.32Issue(4)：87-92,6.
稀酸预处理改善玉米秸秆酶水解性能的机制探讨
Mechanism of Diluted Acid Pretreatment to Improve Enzymatic Hydrolysis of Corn Stover
摘要
Abstract
In order to study the mechanism of diluted acid pretreatment on enhancing cellulose conversion during cellulase hydrolysis process, microscopic structure and physical/chemical characteristics of corn stover before and after diluted acid pretreatment were investigated. The cellulose conversion ratio increased from 31. 88 % to 95.74 % when the corn stover was pretreated by 1. 875 % acid solution as a 1: 15 liquid ratio at 170 ℃ for 60 min. The XRD analysis showed that the crystallinity of cellulose increased from 31.88 % to 58.7 % after acid pretreatment. But only slight change of cellulose crystalline was observed when the com stover was treated to some level. The rough fiber surface with more holes was detected after dilute acid pretreatment. This was beneficial for the connection between cellulose and corn stover. The specific surface area significantly increased from 0.329 m2/g to 2. 878 m2/g after dilute acid pretreatment. It was also beneficial for enzymatic hydrolysis of com stover cellulose.关键词
玉米秸秆/结晶度/比表面积Key words
corn stover/crystallinity index /Specific surface area分类
化学化工引用本文复制引用
姚兰,赵建,谢益民,杨海涛,杨五峰,曲音波..稀酸预处理改善玉米秸秆酶水解性能的机制探讨[J].林产化学与工业,2012,32(4):87-92,6.基金项目
国家重点基础发展研究计划(2011CB707401) （2011CB707401）
国家自然科学基金资助项目(30901140) （30901140）
国际合作项目(2010DFA32560) （2010DFA32560）
