INFIQC   05475
INSTITUTO DE INVESTIGACIONES EN FISICO- QUIMICA DE CORDOBA
Unidad Ejecutora - UE
artículos
Título:
Relative rate coefficients of OH radical reactions with CF3CFCClCF3 and CF3CHCHCH2OH. Ozone depletion potential estimate for CF3CFCClCF3
Autor/es:
ARANGUREN ABRATE, JUAN P.; PISSO, IGNACIO; PEIRONE, SILVINA A.; COMETTO, PABLO M.; LANE, SILVIA I.
Revista:
ATMOSPHERIC ENVIRONMENT
Editorial:
PERGAMON-ELSEVIER SCIENCE LTD
Referencias:
Lugar: Amsterdam; Año: 2013 vol. 67 p. 85 - 92
ISSN:
1352-2310
Resumen:
The relative rate method was used to determine the rate coefficients for the reactions of OH radicals with CF3CFdouble bond; length as m-dashCClCF3 (k1) and CF3CHdouble bond; length as m-dashCHCH2OH (k2). Experiments were carried out at (298 ± 2) K and atmospheric pressure using ultra pure air or ultra pure nitrogen as the gas bath. The k1 value was measured relative to those of chloroethane and ethane, and the k2 value was measured relative to those of cyclohexene and 1-pentene. The following rate coefficients were derived in units of cm3 molecule−1 s−1: k1 = (3.3 ± 0.9) × 10−13 and k2 = (3.3 ± 0.9) × 10−11. This is the first experimental determination of k1 and k2. The rate coefficients were used to estimate the atmospheric lifetimes for the studied haloalkenes considering the OH-initiated oxidation process. The ozone depletion potential (ODP) for CF3CFdouble bond; length as m-dashCClCF3 was estimated following a recently-developed technique based on Lagrangian trajectories, which takes into account the time and location of the release of the short-lived halogenated species.