Global warming potentials of two C9-perfluoroalkenes

Abstract

The vapour phase reactions of perfluoro(3-isopropyl-4-methyl-2-pentene) (T2) and perfluoro(2,4-dimethyl-3-ethyl-2-pentene) (T3) with OH were investigated at 272 and 298 K by the relative rate method. The rate constants for the reaction of T2 and T3 with OH were measured to be 8.56 × 10⁻¹⁵ and 1.19 × 10⁻¹⁵ cm³molecule^{- 1}s^{- 1} at 298 K, respectively. The atmospheric lifetimes of T2 and T3 were estimated to be 4.7 and 39 years, while their radiative efficiency was determined to be 0.658 and 0.747 Wm⁻² ppb⁻¹, respectively. The 100-year global warming potentials of T2 and T3 were estimated to be 430 and 3800, respectively.