Hydrolysis of cellulose into reducing sugar via hot-compressed ethanol/water mixture
- 作者：Cunwen Wang ; wangcw118@hotmail.com ; Fanglei Zhou ; Zhao Yang ; Weiguo Wang ; Faquan Yu ; Yuanxin Wu ; Ru'an Chi
- 关键词：Cellulose hydrolysis ; Reducing sugar ; Hot-compressed ethanol/water mixture ; Crystallinity index ; Microcrystalline cellulose
- 刊名：Biomass and Bioenergy
- 出版年：2012
- 期刊代码：3_09619534
- 类别：pw
- 出版时间：July, 2012
- 卷：42
- 期：Complete
- 页码：143-150
- 文件大小：1129 K
摘要
Hydrolysis of cellulose by hot-compressed ethanol/water mixture is a promising way to obtain reducing sugar (RS) for biofuel production. The purpose of this research is to obtain high RS yield. In this work, the hydrolysis of microcrystalline cellulose by batch hot-compressed ethanol/water mixture was investigated. The influence of the ethanol/water mixture density corresponding to temperature and pressure on the RS yield was further examined. The hydrolysis conditions were optimized for high sugar yield and the crystallinity indexes (CI) of the residue and the original cellulose were analyzed. The RS yield reached as high as 98.22%under the conditions of ethanol mole fraction of 0.22, temperature of 260聽掳C, pressure of 5.75聽MPa, reaction time of 35聽s, and stirring speed of 10聽Hz. The IR crystallinity index of cellulose was decreased to 0.211 from 0.618. It is shown that the RS can be produced effectively by cellulose hydrolysis in hot-compressed ethanol/water mixture.