玉米芯半纤维素水解液电解还原法制备木糖醇  

Xylitol Production from Corncob Hemicellulosic Hydrolysate by Electrolysis Reduction

作　　者：庞建光[1] 金玉美 张明霞[3] 

机构地区：[1]河北工程大学建筑学院,邯郸056038 [2]河北邯郸市牧渔生物科技中心,邯郸056002 [3]河北工程大学理学院,邯郸056038

出　　处：《食品工业》2016年第5期101-104,共4页The Food Industry

基　　金：河北省科技支撑计划项目(No.14227201D)

摘　　要：考察了实验室规模下玉米芯半纤维素水解液电解还原法制备木糖醇的影响因素,通过单因素试验和正交试验,优化了电解条件:以镍片为阴极,铜片为阳极,5%玉米芯半纤维素水解液(以木糖计)作阴极液,阳极液为5%Na_2SO_4溶液,电压20 V,温度为55℃条件下电解4 h,木糖醇收率可达到74.12%。相对于微生物发酵法具有工艺简单、反应时间短、能耗小的特点。Hemicellulose of corncob was hydrolyzed into xylose while sulphuric acid was used as the catalyzer. The xylitol synthesis by electrolysis reduction from hemicellulose hydrolysate was studied in lab-scale. The electrolysis conditions were optimized by single factor test and orthogonal design. Results showed that xylitol synthesis could be operated at the following condition： nickel sheet and copper sheet acted as cathode and anode respectively, catholyte including 5% xylose solution and anolyte including 5% Na_2SO_4 solution, voltage 20 V, temperature 55 ℃ and duration 4 h. In this case, the yield of xylose reached 74.12%. In contrast with the microbiological fermentation, the xylitol synthesis by electrolysis reduction reduced the reacting time. It was also a simple process with low energy requirements.

关 键 词：玉米芯 木糖 木糖醇 电解还原法 

分 类 号：TS245.8[轻工技术与工程—制糖工程]