Atmospheric lifetimes and global warming potentials of atmospherically persistent N(CxF2x+1)(3), x=2-4, perfluoroamines

摘要

Laboratory studies of the gas-phase O(D-1) 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(D-1) + PFA reactive rate coefficient was measured to be (10(-12) cm(3) molecule(-1) s(-1)) 1.10 +/- 0.10, 1.36 +/- 0.10, and 1.69 +/- 0.11 and the UV photodissociation yield, sigma(lambda) x Phi(lambda), at 193 nm was measured to be (10(-23) cm(2) molecule(-1)) 1.37,< 1,< 15 for N(C2F5)(3), N(C3F7)(3), and N(C4F9)(3), respectively. Including estimated Lyman-alpha 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.