两步法高效水解水稻秸秆制取木糖和葡萄糖  

Efficient Hydrolysis of Rice Straw into Xylose and Glucose by a Two-step Process

作　　者：闫碌碌 申锋[1] 王岩 漆新华[1] 

机构地区：[1]农业部环境保护科研监测所,天津300191 [2]天津市建筑材料产品质量监督检测中心,天津300381

出　　处：《农业资源与环境学报》2016年第4期355-360,共6页Journal of Agricultural Resources and Environment

基　　金：国家自然科学基金项目(21577073);中国农业科学院创新工程协同创新项目;青年英才项目;948项目(2016-948-朱岩)

摘　　要：在序批式高压反应釜反应器中,采用两步法研究了水稻秸秆在稀硫酸水溶液中水解为木糖和葡萄糖,系统考察了反应温度、反应时间、水稻秸秆用量和稀酸浓度对水稻秸秆水解反应的影响。实验结果表明:与传统一步法酸水解相比,采用两步法酸水解水稻秸秆,既可以得到很高的木糖产率,又可以得到较高的葡萄糖产率;反应温度、反应时间和酸浓度对水稻秸秆酸水解产物的分布和产率有着重要影响。第一步水解反应中,当底物用量为1.5 g,酸浓度为0.5%wt时,140℃反应120 min,木糖产率高达162.6 g·kg-1;第二步水解反应中,当底物用量为0.5 g,酸浓度为1.0%wt时,180℃反应120 min,葡萄糖产率高达216.5 g·kg-1。本研究为农业废弃物水稻秸秆的高效和高值资源化利用提供了新的策略。The hydrolysis of rice straw into xylose and glucose in dilute sulfuric acid aqueous solution was studied with a two-step process in batch autoclave reactor. The results showed that compared with the traditional one-step acid hydrolysis, both xylose and glucose could be pro- duced in high yields from rice straw by using the two-step acid hydrolysis process. The effects of reaction temperature, reaction time, the amount of rice straw and acid concentration on the hydrolysis of rice straw were systematically studied, and showed that except initial rice straw loading amount, the other parameters had remarkable influence on the products distribution and yields. In the first-step of the hydrolysis process, a high xylose yield of 162.6 g.kg-1 was obtained at 140 ℃ after 120 min reaction time. When the solid residues from the first step were subjected to a second-step hydrolysis, a glucose yield as high as 216.5 g.kg-1 could be achieved at 180 ℃ after 120 min. This work pro- vides a promising strategy for the efficient and value-added utilization of agricultural wastes such as rice straw.

关 键 词：水稻秸秆 葡萄糖 木糖 两步法 水解 

分 类 号：X71[环境科学与工程—环境工程]