Atmospheric chemistry of FCOx radicals: Kinetic and mechanistic study of the FC(O)O2 + NO2 reaction

Timothy J. Wallington; William F. Schneider; Trine E. Møgelberg; Ole J. Nielsen; Jens Sehested

doi:10.1002/kin.550270410

Atmospheric chemistry of FCO_x radicals: Kinetic and mechanistic study of the FC(O)O₂ + NO₂ reaction

Timothy J. Wallington^*, William F. Schneider, Trine E. Møgelberg, Ole J. Nielsen, Jens Sehested

^*Corresponding author af dette arbejde

20 Citationer (Scopus)

Abstract

A pulse radiolysis system was used to study the kinetics of the reaction of FC(O)O₂ radicals with NO₂. By monitoring the rate of the decay of NO₂ using its absorption at 400 nm the reaction rate constant was determined to be (5.5 ± 0.6) × 10⁻¹² cm³ molecule⁻¹ s⁻¹ at 296 K and 500–1000 mbar pressure of SF₆ diluent. A long path length Fourier transform infrared spectrometer was used to investigate the thermal stability of the product FC(O)O₂NO₂. The rate of thermal decomposition of FC(O)O₂NO₂ was independent of the total pressure of N₂ diluent over the range 100–700 torr and was fit by the expression k₋₃ = 6.0 × 10¹⁶ exp(−14150/T) s⁻¹. The results are discussed in the context of the atmospheric chemistry of FCO_x radicals. © 1995 John Wiley & Sons, Inc.

Originalsprog	Engelsk
Tidsskrift	International Journal of Chemical Kinetics
Vol/bind	27
Udgave nummer	4
Sider (fra-til)	391-402
Antal sider	12
ISSN	0538-8066
DOI	https://doi.org/10.1002/kin.550270410
Status	Udgivet - 1 jan. 1995

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10.1002/kin.550270410

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Citationsformater

@article{480481d6e87d487c90f0a62737032ec9,

title = "Atmospheric chemistry of FCOx radicals: Kinetic and mechanistic study of the FC(O)O2 + NO2 reaction",

abstract = "A pulse radiolysis system was used to study the kinetics of the reaction of FC(O)O2 radicals with NO2. By monitoring the rate of the decay of NO2 using its absorption at 400 nm the reaction rate constant was determined to be (5.5 ± 0.6) × 10−12 cm3 molecule−1 s−1 at 296 K and 500–1000 mbar pressure of SF6 diluent. A long path length Fourier transform infrared spectrometer was used to investigate the thermal stability of the product FC(O)O2NO2. The rate of thermal decomposition of FC(O)O2NO2 was independent of the total pressure of N2 diluent over the range 100–700 torr and was fit by the expression k−3 = 6.0 × 1016 exp(−14150/T) s−1. The results are discussed in the context of the atmospheric chemistry of FCOx radicals. {\textcopyright} 1995 John Wiley & Sons, Inc.",

author = "Wallington, {Timothy J.} and Schneider, {William F.} and M{\o}gelberg, {Trine E.} and Nielsen, {Ole J.} and Jens Sehested",

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T2 - Kinetic and mechanistic study of the FC(O)O2 + NO2 reaction

AU - Wallington, Timothy J.

AU - Schneider, William F.

AU - Møgelberg, Trine E.

AU - Nielsen, Ole J.

AU - Sehested, Jens

PY - 1995/1/1

Y1 - 1995/1/1

N2 - A pulse radiolysis system was used to study the kinetics of the reaction of FC(O)O2 radicals with NO2. By monitoring the rate of the decay of NO2 using its absorption at 400 nm the reaction rate constant was determined to be (5.5 ± 0.6) × 10−12 cm3 molecule−1 s−1 at 296 K and 500–1000 mbar pressure of SF6 diluent. A long path length Fourier transform infrared spectrometer was used to investigate the thermal stability of the product FC(O)O2NO2. The rate of thermal decomposition of FC(O)O2NO2 was independent of the total pressure of N2 diluent over the range 100–700 torr and was fit by the expression k−3 = 6.0 × 1016 exp(−14150/T) s−1. The results are discussed in the context of the atmospheric chemistry of FCOx radicals. © 1995 John Wiley & Sons, Inc.

AB - A pulse radiolysis system was used to study the kinetics of the reaction of FC(O)O2 radicals with NO2. By monitoring the rate of the decay of NO2 using its absorption at 400 nm the reaction rate constant was determined to be (5.5 ± 0.6) × 10−12 cm3 molecule−1 s−1 at 296 K and 500–1000 mbar pressure of SF6 diluent. A long path length Fourier transform infrared spectrometer was used to investigate the thermal stability of the product FC(O)O2NO2. The rate of thermal decomposition of FC(O)O2NO2 was independent of the total pressure of N2 diluent over the range 100–700 torr and was fit by the expression k−3 = 6.0 × 1016 exp(−14150/T) s−1. The results are discussed in the context of the atmospheric chemistry of FCOx radicals. © 1995 John Wiley & Sons, Inc.

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