Gas-phase reactivity study of a series of hydrofluoroolefins (HFOs) toward OH radicals and Cl atoms at atmospheric pressure and 298 K

C. M. TOVAR, M. B .BLANCO, I. BEJAN, I. BARNES, P. WIESEN AND M.A. TERUEL

PERGAMON-ELSEVIER SCIENCE LTD

Lugar: Amsterdam; Año: 2014 vol. 88 p. 107 - 107

he relative-rate technique has been used to determine rate coefficients for the reactions of 2-fluoropropene(CH3CF=CH2); 3,3,3-trifluoro-2-(trifluoromethyl)propene ((CF3)2C=CH2) and (E/Z)-1,2,3,3,3-pentafluoropropene ((E/Z)-CF3CF=CHF) with OH radicals and Cl atoms at (298 ± 3) K and (760 ± 10) Torr total pressure of synthetic air using different reference compounds. The experiments were performed in an environmental chamber with ?in situ? FTIR spectroscopy to monitor the concentration-time profiles of the reactants. The following room temperature rate coefficients (in cm3 molecule-1 s-1) were obtained: k1(OH + CH3CF=CH2) = (1.55  0.39) × 10-11, k2 (OH + (CF3)2C=CH2) = (6.58  2.25) ×10-13 , k3 (OH + (E/Z-CF3CF=CHF; 93% E isomer) = (2.62  0.76) × 10-12 , k4 (Cl + CH3CF=CH2) = (1.64  0.26) × 10-10, k5 (Cl + (CF3)2C=CH2) =(3.50  0.85) × 10-11 and k6 (Cl + (E/Z-CF3CF=CHF; 93% E isomer) = (4.52  0.98) × 10-11. To the best of our knowle