Gas-phase kinetics of OH radicals reaction with a series of fluorinated acrylates and methacrylates at atmospheric pressure and 298 K

Degradation mechanism of 2-fluoropropene by Cl atoms: experimental and theoretical products distribution studies

“…Using the experimental kinetic results obtained in our laboratory, we reported previously an atmospheric lifetime of 7 days for the 2-fluoropropene degradation by Cl atoms. 53,54 Concurrently, Gour et al 14 reported τ Cl = 10.8 days from their theoretical work.…”

Atmospheric degradation of industrial fluorinated acrylates and methacrylates with Cl atoms at atmospheric pressure and 298 K

“…Tropospheric lifetimes, x, of the halogenated acrylates and methacrylates studied in this work were calculated through the expression: x = 1/kx[X] with X = Cl. Table lists the atmospheric lifetimes with respect to the reaction with Cl atoms and OH radicals obtained in our previous work (Tovar and Teruel, 2014) for comparative purposes. In the case of Cl reactions, these calculations were performed, considering a global average chlorine concentration of 1 × 10 4 atoms cm -3 (Wingenter et al, 1996).…”

“…We have previously reported the rate coefficients of fluorinated acrylates and methacrylates 2,2,2-trifluoroethylacrylate, 1,1,1,3,3,3-hexafluoroisopropylacrylate, 2,2,2-trifluoroethylmethacrylate and 1,1,1,3,3,3hexafluoroisopropylmethacrylate initiated by OH radicals using relative method by GC-FID (Tovar and Teruel, 2014). In order to increase the knowledge of unsaturated fluoresters, it is necessary to assess the importance of other sink of these industrial fluorinated compounds as the gas-phase reaction of the unsaturated halogenated acrylates and methacrylates together with to study the products obtained to postulate atmospheric chemical mechanisms for Cl atoms reactions.…”

Degradation of a series of fluorinated acrylates and methacrylates initiated by OH radicals at different temperatures

“…37) for the reactions of the uorinated unsaturated esters, studied here, using the following expression: They reported values were 5, 8, 10 and 11 hours for the OH degradation of 2,2,2-triuoroethylmethacrylate, 1,1,1,3,3,3-hexauoroisopropylmethacrylate, 1,1,1,3,3,3-hexa-uoroisopropylacrylate and 2,2,2-triuoroethylacrylate, respectively. 23 For chlorine-initiated degradation the lifetimes are 8 days for 1,1,1,3,3,3-hexauoroisopropylacrylate and 5 days for the other UFE studied. 39 Thus, the main tropospheric chemical removal of these unsaturated uorinated esters seems to be the reaction of OH radicals.…”

“…22) reported the rate coefficient of ambient temperature for OH-initiated oxidation of an unsaturated uorinated acrylate (CH 2 ]CHC(O)O(CH 2 ) 2 C 4 F 9 ) using a 140 L Pyrex reactor coupled to spectroscopy Fourier transformation infrared (FTIR) detection. In addition, Tovar and Teruel 2014, 23 have studied the atmospheric degradation of the titled reactions at 298 K using the relative method by Gas Chromatography with Flame Ionization Detection (GC-FID).…”