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Hydrochloroethers in the troposphere: Kinetics with Cl atoms, lifetimes and atmospheric acceptability indices
Abstract Rate constants for the gas-phase reactions of chlorine atoms with 2-chloroethyl ethyl ether (k 1) and bis(2-chloroethyl) ether (k 2) were determined for the first time using a conventional relative rate technique. Experiments were carried out at (298 ± 2) K and atmospheric pressure using synthetic air as bath gas. The decay rates of the hydrochloroethers were measured relative to those of n-pentane and n-heptane. The following rate constants were derived in units of cm3 molecule−1 s−1: k 1 = (1.7 ± 0.5) × 10−10 and k 2 = (1.0 ± 0.3) × 10−10. The rate constants obtained are compared with previous literature data to indicate reactivity trends and are used to estimate the global atmospheric lifetimes (τ global) of the studied hydrochloroethers. Radiative forcing efficiencies (RE) of the ethers were determined from their integrated IR absorption cross-sections. Using τ global and RE, estimations were made of atmospheric hazard indices of the two chlorinated ethers such as the ozone depletion potential (ODP) and the global warming potential (GWP).
Highlights ► Rate constants for reactions of Cl with two hydrochloroethers. ► Reactivity trends are discussed. ► Atmospheric lifetimes and global warming potentials of the ethers are calculated.
Hydrochloroethers in the troposphere: Kinetics with Cl atoms, lifetimes and atmospheric acceptability indices
Abstract Rate constants for the gas-phase reactions of chlorine atoms with 2-chloroethyl ethyl ether (k 1) and bis(2-chloroethyl) ether (k 2) were determined for the first time using a conventional relative rate technique. Experiments were carried out at (298 ± 2) K and atmospheric pressure using synthetic air as bath gas. The decay rates of the hydrochloroethers were measured relative to those of n-pentane and n-heptane. The following rate constants were derived in units of cm3 molecule−1 s−1: k 1 = (1.7 ± 0.5) × 10−10 and k 2 = (1.0 ± 0.3) × 10−10. The rate constants obtained are compared with previous literature data to indicate reactivity trends and are used to estimate the global atmospheric lifetimes (τ global) of the studied hydrochloroethers. Radiative forcing efficiencies (RE) of the ethers were determined from their integrated IR absorption cross-sections. Using τ global and RE, estimations were made of atmospheric hazard indices of the two chlorinated ethers such as the ozone depletion potential (ODP) and the global warming potential (GWP).
Highlights ► Rate constants for reactions of Cl with two hydrochloroethers. ► Reactivity trends are discussed. ► Atmospheric lifetimes and global warming potentials of the ethers are calculated.
Hydrochloroethers in the troposphere: Kinetics with Cl atoms, lifetimes and atmospheric acceptability indices
Dalmasso, Pablo R. (Autor:in) / Taccone, Raúl A. (Autor:in) / Nieto, Jorge D. (Autor:in) / Cometto, Pablo M. (Autor:in) / Lane, Silvia I. (Autor:in)
Atmospheric Environment ; 47 ; 104-110
13.11.2011
7 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Atmospheric Effects and Spectral Vegetation Indices
| Online Contents | 1994
British Library Online Contents | 2003