Impacts of Thermal Inertia Factor on Adiabatic Decomposition of 40% Mass Content DCP in Ethyl Benzene

Xiaojuan Wu,Liping Chen,Guoning Rao,Ruili Yin,Wanghua Chen

doi:10.1155/2020/9845894

Xiaojuan Wu, Liping Chen + Show 3 more

Open Access

https://doi.org/10.1155/2020/9845894

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Abstract

To reduce the fire and explosion accident of dicumyl peroxide (DCP) in experiment and production, the thermal hazards of DCP and 40% mass content DCP in ethyl benzene (40% DCP) have been studied by the differential scanning calorimeter (DSC) and the accelerating rate calorimeter (ARC) in this paper. DSC experiment showed that ethyl benzene has no effect on the characteristic parameters of thermal decomposition of DCP, such as the temperature of the exothermic peak (Tpeak) and the decomposition energy (Ea), and the thermal decomposition reaction of 40% DCP followed the one-step reaction principle. ARC experiment showed that with the increase of inertia factor (Φ), the measured initial decomposition temperature (Ton) would be higher and the caculated Ea and pre-exponential factor (A) would be greater. It was also proved that after modification of Φ, TD24 was relatively consistent near Ton, but different at higher temperatures. Fisher's correction method was used to verify the necessity of consistency between experimental conditions and prediction conditions.

Highlights

With fast development of industries and wide usage of organic peroxides, the hazard assessment of organic peroxides has become more and more important in many countries
Ermodynamic and kinetic parameters of pure dicumyl peroxide (DCP) and 40% mass content DCP in ethyl benzene can be obtained by a differential scanning calorimeter (DSC) and accelerating rate calorimeter (ARC)
40% mass content DCP in ethyl benzene (40% DCP) was prepared by assuming both DCP and ethyl benzene were at 100% purity. e configured solution was placed in a refrigerator

Summary

Introduction

With fast development of industries and wide usage of organic peroxides, the hazard assessment of organic peroxides has become more and more important in many countries. The sample is small, the maximum self-heating rate can exceed the maximum tracking rate of ARC for the large decomposition heat of DCP. It will result in some errors in the experiment [6]. Ermodynamic and kinetic parameters of pure DCP and 40% mass content DCP in ethyl benzene can be obtained by a differential scanning calorimeter (DSC) and ARC. Based on these thermal data, safety studies can be done to distinguish the dangers caused by the two material systems. With “Fisher’s” method, the best experiment condition of ARC will be discussed

Materials and Methods

Analysis of DSC Measurement

Conclusions