Rate coefficients for reactions of several hydrofluorocarbons with OH and O(1D) and their atmospheric lifetimes

Abstract

The rate coefficients for the reaction of OH with CH3F, CHF3, C2H5F, C4H2F8, and C5H2F10 were measured at temperatures between 232 and 378 K using the pulsed laser photolysis-laser-induced fluorescence technique. The rate coefficients for the reaction of O(1D) with the above molecules and CH2F2 were measured at room temperature using time-resolved vacuum-U V atomic resonance fluorescence detection of O(3P). The atmospheric lifetimes needed for the evaluation of global warming potentials were calculated for all six molecules using a one-dimensional atmospheric model using the kinetic data obtained in the present study. © 1993 American Chemical Society.