摘要
分析过氧化物的热分解动力学及不同规模下的热危险性，利用同步热分析仪（TG—DSC）测得温升速率分别为3、5、7和9℃／min下的热流率一温度曲线，使用Friedman等转化率法计算出过氧化物分解反应的表观活化能、指前因子，推算出该物质的自加速分解温度tsat及不同规模下的安全指数。结果表明：活化能和指前因子随着转化率的变化而变化，活化能范围为25．2～104．81kJ／mol，指前因子范围为3．3—59．79s^-1。在25kg标准包装下，过氧化物的自加速分解温度为104．6℃，安全指数为0．661；在实验规模、中试规模和生产规模下的安全指数分别为0．995、-0．267、-3．211。
The thermal stability properties of an organic peroxide and thermal hazard on different scales were studied.The curves of thermal decomposition heat flow on the heating rates of 3,5,7,and 9℃/min were obtained by thermogravimetric and differential scanning calorimetry （TG-DSC） heat flux reaction calorimeter.The kinetics parameters of reaction, such as apparent activation energy and pre-exponential factor, were calculated using Friedman isoconversional method based on the thermal decomposition data, and self-accelerating decomposition temperature （tsat ） and the safety index value on different scales were obtained.Results showed that apparent activation energy and pre-exponential factor were not constant, the range of apparent activation energy was 25.2-104. 81 kJ/mol and pre-exponential factor was 3.3-59.79 s-1.Under the standard 25 kg packing,tsat and the safety index values of the peroxide were 104. 6℃ and 0. 661 ,and safety index values of the peroxide were 0. 995,-0. 267 and -3. 211 in the laboratory,pilot and production scale.
出处
《南京工业大学学报（自然科学版）》
CAS
北大核心
2014年第1期88-91,共4页
Journal of Nanjing Tech University(Natural Science Edition)
基金
国家自然科学基金(71001051)
江苏省高校自然科学基金重大项目(10KJA620013)
关键词
过氧化物
热分解
动力学分析
自加速分解温度
安全指数
peroxide
thermal decomposition
kinetics analysis
self-accelerating decomposition temperature
safety index
