Kinetic study of the gas-phase reaction of CF 3CHFCF 2CH 2OH with OH radicals at 230–430 K

Abstract

The rate constants, k l, for the reaction of CF 3CHFCF 2CH 2OH with OH radicals were measured using both absolute and relative rate methods at 230–430 K. The absolute rate constants were measured at 250–430 K using flash photolysis and laser photolysis combined with laser-induced fluorescence detection. A smog chamber/FTIR technique was used for the relative rate measurements at 230–308 K with CH 2Cl 2 and CHCl 3 as reference compounds. The k l values obtained with the two methods were consistent within the experimental uncertainties. The temperature dependence of k l was determined to be (2.49 ± 0.30) × 10 −12 exp[−(880 ± 40)/ T] cm 3 molecule −1 s −1. The atmospheric lifetime was estimated to be 0.34 year.