Decomposition Kinetics of Perfluoro‐(4‐methyl‐2‐pentene) (C6F12) and its Extinguishing Performance Study

Abstract

AbstractThe urgent desire for Halon substitution has initiated the development of potential environment friendly alternatives since the Montreal Protocol and subsequent amendments were introduced. Atmospheric degradable agents such as halogenated alkenes, fluorinated ketones and cyclic compounds have been extensively studied. Among them, perfluoro‐(4‐methyl‐2‐pentene) (C6F12) has an analogous structure to C6F12O (Novec 1230) and has been regarded as one kind of potential substitute. In this paper, the main decomposition kinetics of C6F12 are studied numerically. In addition, the interactions between C6F12 and flames are studied experimentally. The results show that the suppression effectiveness of C6F12 is comparable to C6F12O, and the temperature rise is not obvious. The low chemical reactivity is believed to be caused by the perfluorinated methyl and isopropyl groups adjacent to olefinic carbon decreasing the reactivity of C6F12 toward OH radicals. Chemical kinetics simulation indicates that H‐induced reactions dominate the initial decomposition of C6F12, and a lot of isomers will be formed via a series of isomerization reactions and subsequent decomposition reactions at high temperature. These findings suggest the promising applicability of C6F12 and worth further study.