全氟磺酸树脂催化玉米芯水解条件的优化

Optimization of Hydrolysis Conditions of Corncob Catalyzed by Perfluorinated Sulfonic Acid Resin

通过实验选用全氟磺酸树脂来催化玉米芯水解,并用DNS法测定了水解生成的木糖的含量。探讨了全氟磺酸树脂在不同条件下的催化效果及对木糖含量的影响。在单因素实验基础上,选取催化剂用量、玉米芯目数、反应温度为考察因素,采用响应面分析法确定了最优水解工艺条件为:催化剂用量0.05g、玉米芯目数120目(0.125 mm)、水解温度110℃。在此条件下木糖产率为17.06%。

The perfluorosulfonic acid resin was used to catalyze the hydrolysis reaction of corncob to produce xylose.The content of the product xylose was determined by DNS method.The effect of the amount of catalyst,the corncob particle size,hydrolysis temperature on the xylose yield was investigated.The resultsshowedthat the optimal conditions were as follows:hydrolysis temperature 110℃,corncob particle size 120 mesh,the amount of solid acid 0.05 g.Under this condition,the xylose yield could reach 17.06%.