关键词: 硝基苯, 硝酸, C80微热量热仪, 热稳定性, 自加速分解温度, 反应机理, Nitrobenzene, Nitric acid, C80 calorimeter, Thermal stability, Self-accelerating decomposition temperature (SADT), Reaction mechanism

Abstract: This paper studies the influence of nitric acid on the thermal stabilities of nitrobenzene. The thermal behaviors and chemical thermodynamic parameters of pure nitrobenzene and its mixtures with nitric acid were analyzed by utilizing a CALVET heat flux calorimeter, C80. The chemical reaction kinetic parameters such as activation energy，frequency factor，and heat of reaction were calculated based on C80 experimental data. Based on these parameters and the Semenov thermal explosion theory，the self?accelerating decomposition temperature（SADT）of samples was calculated and compared. A GCT gas chromatography-time of flight mass spectrography was used to analyze the thermal decomposition of pure nitrobenzene under high temperature. The thermal decomposition mechanism of nitrobenzene and its mixture with nitric acid was conjectured.