The study of thermal decomposition of 2-bromo-3,3,3-trifluoropropene and its fire-extinguishing mechanism

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• 作者：Xiaomeng Zhou ; Weiwang Chen ; Mingyong Chao ; Guangxuan Liao
• 关键词：Halon replacement ; Thermal decomposition ; Fire-extinguishing ; Kinetics ; Radicals
• 刊名：Journal of Fluorine Chemistry
• 出版年：2013
• 出版时间：September, 2013
• 年：2013
• 卷：153
• 期：Complete
• 页码：101-106
• 全文大小：1216 K

文摘

As a new kind of Halon replacement, 2-bromo-3,3,3-trifluoropropene (BTP) is highly effective at fire suppression with an extinguishment concentration lower than that of Halon 1301. Although the physical properties and extinguishing characteristics of BTP have been widely reported, there are relatively few studies on its thermal pyrolysis and extinguishing mechanisms. In this study, the thermal decomposition of BTP was studied over a temperature range of 25-800 ¡ãC and the decomposition products were analyzed by GC and GC-MS. Experimental results showed that the decomposition products were mainly trifluoropropyne (CF₃CCH) and/or bromotrifluoromethane (CF₃Br). The calculated apparent activation energies for the thermal pyrolysis of BTP by first order reaction approximation were in excellent agreement with the theoretical calculation results by Gaussian 03. Furthermore, by analyzing decomposition products and their chemical inhibition effect, thermal decomposition mechanism of BTP and its chemical extinguishing mechanism at high temperature were then proposed.