Atmospheric lifetimes and global warming potentials of atmospherically persistent N(CxF2x+1)3, x = 2-4, perfluoroamines
Abstract
Laboratory studies of the gas-phase O(1D) reaction and UV photolysis for N(CxF2x+1)3, x = 2-4, and an evaluation of their atmospheric lifetimes and global warming potentials (GWPs) is reported. The O(1D) + PFA reactive rate coefficient was measured to be (10-12 cm3 molecule-1 s-1) 1.10 ± 0.10, 1.36 ± 0.10, and 1.69 ± 0.11 and the UV photodissociation yield, σ (λ) × Φ (λ) , at 193 nm was measured to be (10-23 cm2 molecule-1) 1.37, <1, <15 for N(C2F5)3, N(C3F7)3, and N(C4F9)3, respectively. Including estimated Lyman-α photolysis leads to total global atmospheric lifetimes of >3000 years. GWPs on the 100-year time-horizon are estimated to be 9900, 8700, and 7800 for N(C2F5)3, N(C3F7)3, and N(C4F9)3, respectively.
- Publication:
-
Chemical Physics Letters
- Pub Date:
- April 2020
- DOI:
- 10.1016/j.cplett.2020.137089
- Bibcode:
- 2020CPL...74437089B
- Keywords:
-
- Perfluoroamine;
- UV absorption spectrum;
- O(<SUP>1</SUP>D) kinetics;
- Atmospheric model;
- Atmospheric lifetime