偶氮二甲酸二异丙酯的热分解及动力学特征研究  

Thermal Decomposition and Kinetics Features of DIAD

作　　者：马莹莹 彭浩梁 张军[2] MA Yingying;PENG Haoliang;ZHANG Jun(Solvay Investment Co.,Ltd.,Shanghai 201100,China;School of Chemical Engineering ,Nanjing University of Science and Technology,Nanjing 210094 ,China)

机构地区：[1]索尔维投资有限公司,上海201100 [2]南京理工大学化工学院,江苏南京210094

出　　处：《安全与环境工程》2019年第3期176-181,192,共7页Safety and Environmental Engineering

摘　　要：采用差示扫描量热仪(DSC)研究了偶氮二甲酸二异丙酯(DIAD)在动态条件下的热稳定性。DSC的测试结果表明:在测试过程中只检测到一段放热信号,且随着升温速率的增加(2℃/min、4℃/min、8℃/min和10℃/min),DIAD样品放热分解的起始温度从199.3℃升至218.4℃,峰值温度从218.5℃升至246.0℃;不同升温速率条件下DIAD样品热分解的平均比放热量(△Hr)为681.8 J/g。基于动态DSC测试数据,利用TSS软件模拟确定了DIAD样品的热分解反应动力学参数。模拟结果表明:DIAD样品的热分解过程遵循自催化反应机理,且拟合得到的DIAD样品热分解反应的动力学参数结果与基于等转化率微分算法计算得到的结果十分接近。基于求取的DIAD热分解动力学模型(自催化反应模型),通过热爆炸模拟对DIAD样品的热危险性进行评估,并利用TSS软件对DIAD样品的若干热危险性和热爆炸性能参数进行了预测,获取了TD24、TD8、TCL、SADT、ET和CT等参数。本研究有助于优化化学品的运输和储存条件,以尽可能地减少工业灾难。This paper studies the thermal stability of DIAD under dynamic conditions by Differential Scan ning Calorimeter (DSC). The DSC results show that only one exothermic peak is identified,and with the increase of the heating rate (2℃/min、4℃/min 、 8℃/min and 10℃/min), the onset decomposition tempera tures are increased from 199.3℃ to 218. 4℃, and the peak temperatures are increased from 218.5℃ to 246. 0℃.Also the average decomposition enthalpy (△Hr) of exothermic peak detected in dynamic tests is 681. 8 J/g. Based on dynamic DSC data, the paper also applies TSS software to determining some thermal decomposition kinetic parameters, and the simulation results show that DIAD underwent an autocatalytic reaction and these simulated kinetic parameters are close to these values calculated by Friedman method based on the dynamic data. Based on the thermal decomposition kinetics model obtained above;the paper e- valuates the thermal hazard of DIAD by thermal explosion simulation,and predicts several thermal hazard parameters, such as TD24,TD8,TCL, SADT, ET and CT. The study helps to optimize the transport and storage conditions of chemicals while minimizing industrial disasters.

关 键 词：偶氮二甲酸二异丙酯(DIAD) 差示扫描量热仪 热分解 动力学模拟 TSS软件 热危险性评估 热爆炸参数 

分 类 号：X932[环境科学与工程—安全科学] TQ086.52[化学工程]