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Thermal hazardous evaluation of autocatalytic reaction of cumene hydroperoxide alone and mixed with products under isothermal and non-isothermal conditions

  • Shang-Hao Liu
  • Chang-Fei Yu
  • Mitali DasEmail author
Article
  • 17 Downloads

Abstract

Severe fire and explosions are frequent phenomena during handling of organic peroxides that are promoted supremely by conditions such as chemical impurities and thermal instability. As an initiator in the polymerization process, cumene hydroperoxide (CHP) has wide usage in the chemical process industry. This violently reactive chemical is studied here experimentally using differential scanning calorimeter (DSC), an isothermal mode of operation that can access the thermal hazards in the decomposition of CHP alone and later mixed with products following an autocatalytic reaction scheme. Importantly, DSC-evaluated thermokinetic parameters such as reaction enthalpy (ΔHd), time to maximum rate (TMRiso), and maximum heat flow (Qmax) were estimated to ascertain the degree of thermal hazard under various transportation and storage temperatures. The Heat-Wait-Search mode of accelerating rate calorimeter has been used to investigate decomposition kinetics parameters data under an adiabatic condition. Data such as initial exothermic temperature (T0), self-heating rate (dT/dt), pressure rise rate (dP/dt) and pressure–temperature profiles help to gauge the runaway reaction hazard of CHP alone and then mixed with its products to support the autocatalytic model of exothermic decomposition. The curve fitting data indicated that activation energy had reduced from 245.4 to 236.7 and 242.3 kJ mol−1, when CHP was mixed with acetone or dicumyl peroxide, respectively. The decrease in activation energy for autocatalytic material thermal decomposition reaction is depicted here with various experimental findings and mathematical analysis.

Keywords

Runaway reaction Autocatalytic reaction ARC DSC Activation Energy CHP 

List of symbols

A

Pre-exponential factor (s−1)

cvb

Average heat capacity of the bomb (J g−1 K−1)

cvs

Average heat capacity of the mass (J g−1 K−1)

dP/dt

Pressure rise rate (bar min−1)

dT/dt

Self-heating rate (°C min−1)

Ea

Apparent activation energy (kJ mol−1)

K

Reaction rate constant

Mb

Mass of bomb (mg)

Ms

Mass of sample (mg)

N

Reaction order

Qpeak

Peak power of the reaction (W g−1)

R

Molar gas constant (8.314 J mol−1 K−1)

rT

Self-heating rate (°C min−1)

T

Reaction temperature (°C)

TMRiso

Time to maximum rate under isothermal (min)

Tf,exo

Final temperature of the exothermic reaction (°C)

Tad

Adiabatic temperature rise (°C)

Tab

Absolute temperature rise (°C)

β

Heating rates (°C min−1)

Φ

Thermal inertia (dimensionless)

Notes

Acknowledgements

The authors would like to express their sincere thanks to the Anhui University of Science and Technology in China under Contract Number QN201613 as well as to the Anhui Province Education Department, Natural Sciences Key Fund, China (Grant No. KJ2017A078).

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Copyright information

© Akadémiai Kiadó, Budapest, Hungary 2019

Authors and Affiliations

  1. 1.State Key Laboratory of Mining Response and Disaster Prevention and Control in Deep Coal MinesAnhui University of Science and Technology (AUST)HuainanChina
  2. 2.School of Chemical EngineeringAUSTHuainanChina
  3. 3.Department of Chemical EngineeringAdhiyamaan College of EngineeringHosurIndia

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