Thermal safety study of (5,6-(dicarboxylate)-pyridin-3-yl) methyl-trimethyl ammonium bromide based on decomposition kinetics

Abstract

The thermal hazard of (5,6-(dicarboxylate)-pyridin-3-yl) methyl-trimethyl ammonium bromide (DPTAB) was evaluated by carrying out dynamic tests on a differential scanning calorimeter, and the thermodynamic parameters were obtained. A kinetic model was established by simulating experimental curves. The model contains two successive self-accelerating stages, and this article aims to explain the effect that these two stages have on the decomposition of DPTAB, respectively. The thermal behaviors were simulated under isothermal, adiabatic, heat-transfer limited conditions, and the results suggest that the decomposition of DPTAB is uncontrollable as it occurs, and the heat dispersed is intense. The self-accelerating decomposition temperature of DPTAB was 110.9 °C, indicating that the storage and transformation temperatures of DPTAB should not be higher than 110.9 °C. The thermal runaway system reached the maximum reaction rate at a temperature of 139.9 °C within 24 h under adiabatic conditions, thus implying that the processing temperature in industrial applications should be maintained below 139.9 °C.