Acta Chimica Sinica ›› 2010, Vol. 68 ›› Issue (18): 1829-1836. Previous Articles     Next Articles

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  1. (1南开大学环境科学与工程学院 天津 300071)
    (2中国科学技术大学火灾科学国家重点实验室 合肥 230026)
    (3公安部天津消防研究所 天津 300381)
  • 投稿日期:2009-12-15 修回日期:2010-04-14 发布日期:2010-05-17
  • 通讯作者: 周晓猛
  • 基金资助:


Research of Production Amount and Mechanism of HF in Fire Extinguishing Process using 1-Bromo-3,3,3-trifluoropropene

Zhou Biao1 Zhou Xiaomeng*,1 Jin Xiang2 Chen Tao3   

  1. (1 College of Environmental Science and Technology, Nankai University, Tianjin 300071)
    (2 State Key Laboratory of Fire Science, University of Science and Technology of China, Hefei 230026)
    (3 Tianjin Fire Research Institute of the Ministry of Public Security, Tianjin 300381)
  • Received:2009-12-15 Revised:2010-04-14 Published:2010-05-17

In the fire-extinguishing process by halocarbon fire extinguishing agent, HF that produced by halocarbon decomposition not only has severe erosion to the metal apparatus, but also make serious harm to the people in fire scene. So the production of HF in fire extinguishing process is an important factor for the application of halocarbon fire extinguishing agent. 1-Bromo-3,3,3-trifluoropropene (BTP), as a kind of tropodegradable halocarbon, is believed to be a potential Halon replacement by fire scientists. However, the study about HF production amount and mechanism is not thorough until now. In this paper, the decomposition of BTP under different temperature is calculated by ab initio method at B3LYP/6-311++G (d,p) level firstly. And then, the production amount of HF is measured real-timely by in-situ spectral diagnostics method when BTP is discharged into the fire protection place. Furthermore, on the basis of the ab initio calculation results and theory analysis of thermodynamics, the model for predicting HF production amount is set up. Finally, by comparing the calculated results and experimental results about HF production amount, the HF production predicting theory model was validated. The research results in the paper show that the flame temperature and the interaction time between BTP and flame are key factors for the HF production amount. By the real time experimental measuring, the HF production amount predicting model that set up on the base of ab initio calculation results is proved to be veracious. The research results in this paper can provide a basis for optimizing BTP system designation and broaden the scope of BTP engineering applications.

Key words: Halon replacement, 1-bromo-3,3,3-trifluoropropene (BTP), HF production amount, thermal decomposition, prediction model