Chemical Physics Letters, Vol.687, 297-302, 2017
Reaction kinetics of (CF3)(2)CFCN with OH radicals as a function of temperature (278-358 K): A good replacement for greenhouse SF6?
In many industrial applications, (CF3)(2)CFCN has been suggested as SF6 substitute, which possess a global warming potential (GWP100-yr) of 23500 relative to CO2. The temperature dependence of the rate coefficient (k(OH)) for the OH + (CF3)(2)CFCN reaction is reported for the first time: k(OH)(278-358 K) = (5.9 +/- 3.2) x 10(-13)exp{-(1856 +/- 162)/T} cm(3) molecule(-1) s(-1). A lifetime of 47 years was estimated relative to that of CH3CCl3. Infrared absorption cross sections were also determined to derive the radiative efficiency (0.28 Wm(-2) ppbv(-1)). A GWP(100)-yr of 3646 was estimated, resulting in a significant reduction of the contribution to global warming if SF6 was replaced by (CF3)(2)CFCN. (C) 2017 Elsevier B.V. All rights reserved.