Atmospheric chemistry of CF3C(O)O2 radicals. Kinetics of their reaction with NO2 and kinetics of the thermal decomposition of the product CF3C(O)O2NO2

Timothy J. Wallington; Jens Sehested; Ole J. Nielsen

doi:10.1016/0009-2614(94)00751-9

Atmospheric chemistry of CF₃C(O)O₂ radicals. Kinetics of their reaction with NO₂ and kinetics of the thermal decomposition of the product CF₃C(O)O₂NO₂

Timothy J. Wallington^*, Jens Sehested, Ole J. Nielsen

^*Corresponding author af dette arbejde

27 Citationer (Scopus)

Abstract

A pulse radiolysis technique has been used to measure a rate constant of (6.6±1.3) x 10^-12 cm³ molecule^-1 s^-1 for the association reaction between CF₃C(O)O₂ radicals and NO₂ at 295 K and one atmosphere total pressure of SF₆ diluent. A FTIR/smog chamber system was used to study the thermal decomposition CF₃C(O)O₂NO₂. The rate of decomposition of CF₃C(O)O₂NO₂ was independent of the total pressure of N₂ diluent over the range 100-700 Torr and was fit by the expression k_-1=(1.9_-1.5 ^+7.6)x10¹⁶ exp[(-14000±480)/T] s^-1. Implications for the atmospheric chemistry of CFC replacements are discussed.

Originalsprog	Engelsk
Tidsskrift	Chemical Physics Letters
Vol/bind	226
Udgave nummer	5-6
Sider (fra-til)	563-569
Antal sider	7
ISSN	0009-2614
DOI	https://doi.org/10.1016/0009-2614(94)00751-9
Status	Udgivet - 26 aug. 1994

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Citationsformater

@article{f7a3c77cd1004dbca191aaaaceb35718,

title = "Atmospheric chemistry of CF3C(O)O2 radicals. Kinetics of their reaction with NO2 and kinetics of the thermal decomposition of the product CF3C(O)O2NO2",

abstract = "A pulse radiolysis technique has been used to measure a rate constant of (6.6±1.3) x 10-12 cm3 molecule-1 s-1 for the association reaction between CF3C(O)O2 radicals and NO2 at 295 K and one atmosphere total pressure of SF6 diluent. A FTIR/smog chamber system was used to study the thermal decomposition CF3C(O)O2NO2. The rate of decomposition of CF3C(O)O2NO2 was independent of the total pressure of N2 diluent over the range 100-700 Torr and was fit by the expression k-1=(1.9-1.5 +7.6)x1016 exp[(-14000±480)/T] s-1. Implications for the atmospheric chemistry of CFC replacements are discussed.",

author = "Wallington, {Timothy J.} and Jens Sehested and Nielsen, {Ole J.}",

year = "1994",

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T1 - Atmospheric chemistry of CF3C(O)O2 radicals. Kinetics of their reaction with NO2 and kinetics of the thermal decomposition of the product CF3C(O)O2NO2

AU - Wallington, Timothy J.

AU - Sehested, Jens

AU - Nielsen, Ole J.

PY - 1994/8/26

Y1 - 1994/8/26

N2 - A pulse radiolysis technique has been used to measure a rate constant of (6.6±1.3) x 10-12 cm3 molecule-1 s-1 for the association reaction between CF3C(O)O2 radicals and NO2 at 295 K and one atmosphere total pressure of SF6 diluent. A FTIR/smog chamber system was used to study the thermal decomposition CF3C(O)O2NO2. The rate of decomposition of CF3C(O)O2NO2 was independent of the total pressure of N2 diluent over the range 100-700 Torr and was fit by the expression k-1=(1.9-1.5 +7.6)x1016 exp[(-14000±480)/T] s-1. Implications for the atmospheric chemistry of CFC replacements are discussed.

AB - A pulse radiolysis technique has been used to measure a rate constant of (6.6±1.3) x 10-12 cm3 molecule-1 s-1 for the association reaction between CF3C(O)O2 radicals and NO2 at 295 K and one atmosphere total pressure of SF6 diluent. A FTIR/smog chamber system was used to study the thermal decomposition CF3C(O)O2NO2. The rate of decomposition of CF3C(O)O2NO2 was independent of the total pressure of N2 diluent over the range 100-700 Torr and was fit by the expression k-1=(1.9-1.5 +7.6)x1016 exp[(-14000±480)/T] s-1. Implications for the atmospheric chemistry of CFC replacements are discussed.

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DO - 10.1016/0009-2614(94)00751-9

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