Iwata Yusaku, Koseki Hiroshi
National Research Institute of Fire and Disaster, 4-35-3 Jindaijihigashi-machi, Chofu, Tokyo 182-8508, Japan.
J Hazard Mater. 2008 Nov 15;159(1):35-41. doi: 10.1016/j.jhazmat.2008.01.041. Epub 2008 Jan 19.
An automatic pressure tracking adiabatic calorimeter (APTAC) had been employed to obtain the thermokinetic and the vapor pressure data during runaway reactions. The APTAC is an adiabatic calorimeter with a large-scale sample mass and low thermal inertia, and is an extremely useful tool for assessing thermal hazards of reactive chemicals. The data obtained by the APTAC are important information for the design of the safe industrial process. The thermodynamics parameters and the gas production were discussed on the basis of the experimental data of various concentrations and weights of di-tert-butyl peroxide (DTBP)/toluene solution for the purpose of investigating the properties of the APTAC data. The thermal decomposition of DTBP was studied on the basis of the temperature data and the pressure data obtained by the APTAC. The activation energy and the frequency factor of DTBP are nearly constant and the same as the literature values in the concentrations between 20 and 60 wt.%. The pressure rise due to gas production is important data for designing the relief vent of a reactor. The time history of the gas production was investigated with various weights and concentrations. The total gas production index, which had the vapor pressure correction, was 1.0 in the decomposition of DTBP.
一种自动压力跟踪绝热量热仪（APTAC）已被用于获取失控反应过程中的热动力学和蒸气压数据。APTAC是一种具有大规模样品质量和低热惯性的绝热量热仪，是评估反应性化学品热危害的极其有用的工具。由APTAC获得的数据是安全工业过程设计的重要信息。基于不同浓度和重量的二叔丁基过氧化物（DTBP）/甲苯溶液的实验数据，讨论了热力学参数和气体产生情况，以研究APTAC数据的特性。基于APTAC获得的温度数据和压力数据，研究了DTBP的热分解。在20至60 wt.%的浓度范围内，DTBP的活化能和频率因子几乎恒定且与文献值相同。由于气体产生导致的压力上升是设计反应器泄放口的重要数据。研究了不同重量和浓度下气体产生的时间历程。在DTBP分解中，经过蒸气压校正的总气体产生指数为1.0。
