间歇式反应系统参数敏感性与热失控临界判据

Parameter sensitivity and critical criterion thermal runaway of batch reaction system

为进一步验证间歇式反应系统的参数敏感性,预测热失控临界值,以硫酸催化乙酸酐水解反应作为研究对象,考察不同反应初始温度及反应初始浓度下反应温度的变化特性。采用基于雅克比矩阵迹的热失控临界判据,模拟计算硫酸催化乙酸酐水解反应系统参数敏感临界值。结果表明:反应温度对反应初始温度和初始浓度都有参数敏感性,当初始温度和初始浓度位于参数敏感临界值附近时,其微小变化将会引起温度急剧变化;用基于雅克比矩阵迹的判据预测反应系统热失控临界参数,临界判据计算的临界值与试验结果能很好地吻合。

Batch reaction systems are a nonlinear dynamic system that exhibits parametric sensitivity within a certain operating range.Experiments were carried out on hydrolysis reaction of acetic anhydride with a catalyst of sulfuric acid to study the parameter sensitivity of the batch reaction system under different initial temperature and initial concentration conditions.The critical parameters of the batch reaction system were simulated according to the critical criterion based on traces of Jacobian matrix.The research results show that the small changes in the parameter value will cause drastic changes of temperature when the operating parameters approach the critical value,and that the critical criterion based on traces of Jacobian matrix can accurately predict the critical parameters of the thermal runaway system,the simulation results are in good agreement with the experimental data.