Hazard assessment of thermal decomposition behavior of cumene hydroperoxide under heterogeneous temperature system

Abstract

To accurately evaluate the thermal hazards of cumene hydroperoxide (CHP) under heterogeneous temperature systems, a pressure vessel test device was employed to analyze the decomposition behavior of CHP in the heterogeneous temperature vessel. The influences of furnace temperature (200°C–300 °C) and sample mass (1 g–5 g) on the decomposition behavior were discussed respectively. The results show that in the 10 groups of experiments, CHP begins to accelerate autocatalytically after a long period of initiation step, with a rapid increase in temperature and pressure, and reach the maximum temperature and pressure rise rates in the later period. The maximum temperature and pressure are 248.39 °C and 324.1 kPa, and the maximum temperature and pressure rise rates reach 8.477 °C/s and 71.6 kPa/s, respectively. At a sample mass of 3 g, with the increase of furnace temperature, the maximum temperature and temperature rise rate increase, while both the maximum pressure and pressure rise rate are close; the thermal decomposition reaction time decreases exponentially, which obeys an equation of Δtd=2.592×107exp(−Te/18.051)+184.325(200°C≤Te≤300°C). At a furnace temperature of 300 °C, the maximum values of temperature, temperature rise rate, pressure, and pressure rise rate all increase with increasing sample mass.