Abstract: Corn cob is a kind of abundant and sustainable resource which can be used to produce high-value chemical products. In this study，formic acid（3%） was used as catalyst to hydrolyse corn cob. Several conditions of reaction time （0—240 min） and reaction temperature （120—150℃） were studied to produce xylose at a constant liquid to soild ratio of 10 mL/g. Kinetic parameters of two-phase model for predicting the concentration of xylose in the hydrolysates were established. The activation energy of xylose degradation was higher than that of xylose formation，indicating that higher temperature was negative to xylose production. The maximum xylose concentration of 26.9 g/L was achieved under the optimal conditions （3% acid mass ratio，180 min，140℃，and 10 mL/g liquid to soild ratio）.

Key words: biomass, hydrolysis, kinetics, formic acid, xylose

摘要： 玉米芯是一种价格低廉、可再生的资源，其可以被用来生产高附加值的化工产品。本文主要研究在甲酸质量分数3%、液固比为10mL/g、反应温度（120～150℃）、反应时间（0～240min）条件下玉米芯中半纤维素水解过程。采用两相模型对玉米芯水解过程中木糖浓度进行拟合并得到反应过程的动力学参数。木糖降解反应的活化能大于其生成反应的活化能，这表明高温不利于木糖的生产。对得到动力学方程进行分析，获得最佳的反应条件：甲酸质量分数3%、液固比10mL/g、反应温度140℃、反应时间180min。最佳反应条件下得到的木糖浓度为26.9 g/L。

关键词: 生物质, 水解, 动力学, 甲酸, 木糖