化工学报 ›› 2013, Vol. 64 ›› Issue (5): 1526-1531.DOI: 10.3969/j.issn.0438-1157.2013.05.004

• 热力学 • 上一篇    下一篇

硝酸对硝基苯热稳定性的影响机理

阮继锋1, 孙金华1, 郭耸2, 平平1   

  1. 1. 中国科学技术大学火灾科学国家重点实验室, 安徽 合肥 230026;
    2. 南京理工大学化工学院, 江苏 南京 210094
  • 收稿日期:2012-09-05 修回日期:2013-01-27 出版日期:2013-05-05 发布日期:2013-05-05
  • 通讯作者: 孙金华
  • 作者简介:阮继锋(1974-),男,博士研究生,副研究员。

Influence mechanism of nitric acid on thermal stability of nitrobenzene

RUAN Jifeng1, SUN Jinhua1, GUO Song2, PING Ping1   

  1. 1. State Key Laboratory of Fire Science, University of Science and Technology of China, Hefei 230026, Anhui, China;
    2. School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, Jiangsu, China
  • Received:2012-09-05 Revised:2013-01-27 Online:2013-05-05 Published:2013-05-05

关键词: 硝基苯, 硝酸, 热稳定性, 自加速分解温度, 反应机理

Abstract: The influence of nitric acid on the thermal stability of nitrobenzene was studied.The thermal behavior and chemical thermodynamic parameters of pure nitrobenzene and its mixtures with nitric acid were analyzed by utilizing a CALVET heat flux calorimeter, C80.The kinetic parameters of chemical reaction, such as activation energy, frequency factor and heat of reaction, were calculated based on the experimental data of C80.Based on these parameters and the Semenov thermal explosion theory, the self-accelerating decomposition temperature 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 at high temperature.The thermal decomposition mechanism of nitrobenzene and its mixture with nitric acid was proposed.

Key words: nitrobenzene, nitric acid, thermal stability, self-accelerating decomposition temperature, reaction mechanism

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