分子筛催化葡萄糖水解的宏观动力学

Macrokinetics of Catalytic Hydrolysis of Glucose over Molecular Sieves Catalysts

分别采用硅铝比为20-25和30的两种ZRP-5分子筛催化剂研究不同温度下葡萄糖水解动力学。研究结果表明，葡萄糖水解属于一级反应，反应温度显著地影响葡萄糖的转化。在相同反应温度下，前者作用下葡萄糖水解的表观反应速率常数大于后者。前者作用下葡萄糖水解的表观活化能为99．24kJ／mol，后者作用下葡萄糖水解的表观活化能为108．99kJ／mol。该反应动力学方程的葡萄糖水解转化率计算值与实验值吻合较好。

The kinetics of hydrolysis of glucose over two molecular sieves catalysts with different Si/Al ratio （20-25 and 30 respectively） were studied at four different temperatures . The results showed that with the reaction temperature increasing, glucose was converted more quickly and glucose conversion was increased. The hydrolysis of glucose was a first-order reaction. At the same temperature, the apparent reaction rate constant over the former catalyst was higher than that over the latter catalyst. Over the former catalyst, the apparent activation energy of glucose hydrolysis was 99.24 kJ/mol , while over the latter, the apparent activation energy was 108.99 kJ/mol. The glucose conversion calculated by glucose hydrolysis kinetics equations were in agreement with the experimental data.