六氟丙烷的热解过程及其动力学灭火机理  

Pyrolysis Process of 1,1,1,3,3,3-Hexafluoropropane and Its Fire Suppression Mechanism

作　　者：周晓猛[1] 周彪[1] 陈涛[2] 傅学成[2] 王荣基[2] 

机构地区：[1]南开大学环境科学与工程学院,天津300071 [2]公安部天津消防研究所,天津300381

出　　处：《燃烧科学与技术》2011年第5期381-387,共7页Journal of Combustion Science and Technology

基　　金：国家自然科学基金资助项目(50706018);天津市应用基础与前沿技术研究计划资助项目(08JCYBJCl0700)

摘　　要：针对目前全氟烷烃灭火机理认识的不足,首先选取六氟丙烷为研究对象,通过管式裂解炉对六氟丙烷进行加热,进行不同温度下的裂解实验;其次,通过色谱-质谱联用仪,对六氟丙烷热解产物进行测定,分析六氟丙烷热分解活化能随温升的变化;最后,通过实验测量结果和理论分析的结合,研究六氟丙烷化学灭火机理的动力学模型.研究结果表明,六氟丙烷热分解的临界温度在400～600,℃之间,且热分解活化能随温度的升高而降低;灭火过程为燃烧过程中产生的自由基逐步转化为稳态物质的复杂链反应.其研究结果为深入认识六氟丙烷的微观灭火过程提供了理论基础.In this paper, the pyrolysis process of CF3CH2CF3 is studied under different temperature by tube pyrolysis apparatus. Then, the decomposed products are analyzed by gas chromatography-mass spectrometry, and the decomposition mechanism is particularly discussed. Finally, by coupling experimental result with theoretical analysis, the fire suppression mechanism is proposed. The results show that when the temperature is between 400 ℃ and 600 ℃, CFaCH2CF3 is decomposed. Besides, with the increase of thermal decomposition temperature, the active energy for CF3CH2CF3 pyrolysis decreases. The fire extinguishing process of CF3CH2CF3 is a complex chain reaction in which the radical gradually changes into steady state material, which can give a strong support for deeply understanding the fire extinguishing process of CF3CH2CF3.

关 键 词：哈龙替代 六氟丙烷 热解机理 灭火机理 管式裂解炉 

分 类 号：TQ569[化学工程—炸药化工]