亚临界水水解稻草生产还原糖：重点关注降解副产物和动力学分析。
Subcritical water hydrolysis of rice straw for reducing sugar production with focus on degradation by-products and kinetic analysis.
机构信息
State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, China.
State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, China.
出版信息
Bioresour Technol. 2015 Jun;186:8-14. doi: 10.1016/j.biortech.2015.03.047. Epub 2015 Mar 14.
The competitive reactions of reducing sugar production and degradation in the subcritical water hydrolysis of rice straw were investigated to optimise reducing sugar yield. The optimised conditions (280°C, 20 MPa, rice straw concentration of 5 wt.% and agitation speed of 200 rpm) resulted in a reducing sugar yield of 0.346 g/g rice straw because of the enhanced reducing sugar production and decreased sugar degradation. The sugar yield increased when the temperature increased from 250°C to 280°C, but it decreased when the temperature further increased to 300°C because of the degradation of monosaccharides (e.g. glucose and xylose) into by-products (e.g. 2-methyltetrahydrofuran and acetic acid). A first-order reaction model was developed to elucidate the competitive reaction kinetics of sugar production and degradation at various temperatures. The highest reducing sugar yield based on the model was achieved at 280°C with the highest production and lowest degradation rates.
研究了在亚临界水中水解稻草时还原糖生成和降解的竞争反应，以优化还原糖产率。在优化条件（280°C、20 MPa、稻草浓度为 5wt.%和搅拌速度为 200 rpm）下，由于还原糖生成增加和糖降解减少，还原糖产率达到 0.346 g/g 稻草。当温度从 250°C 升高到 280°C 时，糖产量增加，但当温度进一步升高到 300°C 时，由于单糖（如葡萄糖和木糖）降解为副产物（如 2-甲基四氢呋喃和乙酸），糖产量下降。建立了一个一级反应模型来阐明在不同温度下糖生成和降解的竞争反应动力学。基于该模型，在 280°C 时达到了最高的还原糖产率，具有最高的生成率和最低的降解率。
Zotero 插件