摘要
以硫酸为催化剂,考察了微波辐射条件下,反应温度和硫酸浓度对木糖降解反应的影响,拟合实验数据并建立反应动力学方程。结果表明,木糖转化率随温度的升高而增加,随着硫酸质量分数的增加而增加,催化活性较好。木糖脱水反应级数为一级,降解反应的活化能为48.05 kJ/mol,指前因子与硫酸浓度成幂指数关系。通过实验数据拟合得到的动力学方程能较好的反映实际木糖降解反应。
With dilute sulfuric acid as catalyst, the effects of reaction temperature and sulturic acld concentration on xylose dehydration reaction were investigated under microwave irradiation. The kinetics equation of xylose dehydration was built. The results showed that the conversion of xylose increased with the increase of reaction temperature and mass fraction of sulfuric acid. The activation energy was 48.05 kJ/mol and the frequency factor changed with mass fraction of sulfuric acid. The conversion of xylose calculated by the kinetics equation was in good agreement with the conversion from experiment.
出处
《化学反应工程与工艺》
CAS
CSCD
北大核心
2010年第3期275-278,共4页
Chemical Reaction Engineering and Technology
基金
国家科技支撑计划项目(2006BAD07A08)
中国博士后科学基金资助项目(20080440365)
关键词
微波辐照
木糖
糠醛
动力学
活化能
microwave irradiation
xylose
furfural
reaction kinetics
activation energy
