1-己烯热裂解反应动力学分析

KINETICS ANALYSIS OF 1-HEXENE PYROLYSIS

在873～973 K温度区间,用柱塞流连续流动管式反应器考察1-己烯热裂解反应。根据反应产物的种类分布并结合自由基基元反应化学,建立1-己烯热裂解链式反应机理模型,推导出相应的反应动力学方程。通过拟合反应实验数据,证实1-己烯热裂解转化具有一级反应动力学的特征,反应温度从873 K依次升高到923 K和973 K,反应速率常数从0.0312 s^(-1)提高到0.116 s^(-1)和0.453 s^(-1)。在所观察的温度区间,该反应的表观活化能为(188.7±1.0)kJ/mol。

Pyrolysis of 1-hexene was conducted with a plug-flow continuous tube reactor under the temperature range of 873--973 K. According to the product distributions and the chemistry of radical reactions, a chain reaction mechanism for 1-hexene pyrolysis was proposed and a corresponding kinetic model was set up. Fitting the model with experimental data showed that the conversion of 1-hexene was a first order reaction. When the reaction temperature increased from 873 K to 923 K and to 973 K, the rate constants were 0. 031 2 s^-1, 0. 116s^-1 and 0. 453 s^-1, respectively. The apparent activation energy of the pyrolysis of l-hexene in the tested temperature range （873-973 K） was determined to Be （188.7±1.0）kJ/mol.