预处理蔗渣纤维素水解糖化研究  

Study on saccharification of pretreated sugarcane bagasse cellulose

作　　者：刘瑞[1] 刘琴[1] 肖琳莎 宋航[1] 兰先秋[1] 

机构地区：[1]四川大学化学工程学院,四川成都610065 [2]四川师范大学,四川成都610101

出　　处：《合成纤维工业》2014年第5期43-47,共5页China Synthetic Fiber Industry

摘　　要：采用两段稀酸水解法对用质量分数为5%氢氧化钠溶液预处理后的蔗渣进行了水解糖化研究,考察了液固比、硫酸体积分数、反应时间及催化剂硫酸亚铁对葡萄糖得率及纤维素水解率的影响。结果表明:第一段主要是半纤维素水解,以及少量纤维素水解,最优条件为液固比10 mL/g,硫酸体积分数3%,在121℃下反应3 h,葡萄糖得率为22.16%,纤维素水解率为25.98%;对残渣继续第二段水解,最优条件为液固比8 mL/g,硫酸体积分数为8%,硫酸亚铁质量分数1%,在121℃下反应5.5 h,葡萄糖得率为41.05%,纤维素水解率为56.36%;采用两段稀酸水解法水解蔗渣,葡萄糖总得率为52.68%,纤维素总水解率为67.70%。Two-step dilute acid hydrolysis was used to study the saccharification of sugarcane bagasse pretreated with 5% sodium hydroxide solution by mass fraction. The effects of liquid-to-solid ratio, sulfuric acid volume fraction, reaction time and ferrous sulfate catalyst on the glucose yield and cellulose hydrolysis rate were investigated. The results showed that the principal reaction of the first stage was hemicellulose and trace cellulose hydrolysis, and the glucose yield was 22.16% and the cellulose hydrolysis rate was 25.98% under the optimal process conditions as followed： liquid-to-solid ratio 10 mL/g, sulfuric acid volumn fraction 3%, reaction temperature 121 ℃ and time 3 h; the second stage was the residual hydrolysis, and the glucose yield was 41.05% and the cellulose hydrolysis rate was 56.36% under the optimal process conditions as followed： liquid-to-solid ratio 8 mL/g, sulfuric acid volumn fraction 8% , ferrous sulfate mass fraction 1% , reaction temperature 121 ℃ and time 5.5 h; and the total glucose yield was 52.68% and the total cellulose hydrolysis rate was 67.70% when the two-step dilute acid hydrolysis was applied in sugarcane bagasse saccharification.

关 键 词：蔗渣 纤维素 硫酸 硫酸亚铁 两段水解 葡萄糖 水解工艺 

分 类 号：TQ353.423[化学工程]