Atmospheric chemistry of CF3CH2OCH3: reaction with chlorine atoms and OH radicals, kinetics, degradation mechanism and global warming potential

Freja From Østerstrøm; Ole John Nielsen; Mads P. Sulbæk Andersen; Timothy J. Wallington

doi:10.1016/j.cplett.2011.12.047

Atmospheric chemistry of CF₃CH₂OCH₃: reaction with chlorine atoms and OH radicals, kinetics, degradation mechanism and global warming potential

Freja From Østerstrøm, Ole John Nielsen, Mads P. Sulbæk Andersen, Timothy J. Wallington

Department of Chemistry

16 Citations (Scopus)

Abstract

FTIR smog chamber techniques were used to measure k(Cl + CF ₃CH ₂OCH ₃) = (2.28 ± 0.44) × 10 ^-11 and k(OH + CF ₃CH ₂OCH ₃) = (4.9 ± 1.3) × 10 ^-13 cm ³ molecule ^-1 s ^-1 in 700 Torr total pressure of air at 296 ± 2 K. The atmospheric lifetime of CF ₃CH ₂OCH ₃ is estimated at 25 days. Reaction of Cl atoms with CF ₃CH ₂OCH ₃ proceeds 79 ± 4% at the CH ₃ group and 22 ± 2% at the CH ₂ group. Reaction with OH radicals proceeds 55 ± 5% at the CH ₃ group yielding CF ₃CH ₂OCHO and 45 ± 5% at the CH ₂ group yielding COF ₂ and CH ₃OCHO as primary oxidation products. The infrared spectrum of CF ₃CH(O)OCH ₃ was measured and a global warming potential GWP ₁₀₀ = 8 was estimated. The atmospheric chemistry and environmental impact of CF ₃CH ₂OCH ₃ is discussed in context of the use of hydrofluoroethers as CFC substitutes.

Original language	English
Journal	Chemical Physics Letters
Volume	524
Pages (from-to)	32-37
Number of pages	6
ISSN	0009-2614
DOIs	https://doi.org/10.1016/j.cplett.2011.12.047
Publication status	Published - 6 Feb 2012

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Atmospheric chemistry of CF₃CH₂OCH₃: reaction with chlorine atoms and OH radicals, kinetics, degradation mechanism and global warming potential. / Østerstrøm, Freja From ; Nielsen, Ole John; Andersen, Mads P. Sulbæk et al.
In: Chemical Physics Letters, Vol. 524, 06.02.2012, p. 32-37.

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title = "Atmospheric chemistry of CF3CH2OCH3: reaction with chlorine atoms and OH radicals, kinetics, degradation mechanism and global warming potential",

abstract = "FTIR smog chamber techniques were used to measure k(Cl + CF 3CH 2OCH 3) = (2.28 ± 0.44) × 10 -11 and k(OH + CF 3CH 2OCH 3) = (4.9 ± 1.3) × 10 -13 cm 3 molecule -1 s -1 in 700 Torr total pressure of air at 296 ± 2 K. The atmospheric lifetime of CF 3CH 2OCH 3 is estimated at 25 days. Reaction of Cl atoms with CF 3CH 2OCH 3 proceeds 79 ± 4% at the CH 3 group and 22 ± 2% at the CH 2 group. Reaction with OH radicals proceeds 55 ± 5% at the CH 3 group yielding CF 3CH 2OCHO and 45 ± 5% at the CH 2 group yielding COF 2 and CH 3OCHO as primary oxidation products. The infrared spectrum of CF 3CH(O)OCH 3 was measured and a global warming potential GWP 100 = 8 was estimated. The atmospheric chemistry and environmental impact of CF 3CH 2OCH 3 is discussed in context of the use of hydrofluoroethers as CFC substitutes.",

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TY - JOUR

T1 - Atmospheric chemistry of CF3CH2OCH3

T2 - reaction with chlorine atoms and OH radicals, kinetics, degradation mechanism and global warming potential

AU - Østerstrøm, Freja From

AU - Nielsen, Ole John

AU - Andersen, Mads P. Sulbæk

AU - Wallington, Timothy J.

PY - 2012/2/6

Y1 - 2012/2/6

N2 - FTIR smog chamber techniques were used to measure k(Cl + CF 3CH 2OCH 3) = (2.28 ± 0.44) × 10 -11 and k(OH + CF 3CH 2OCH 3) = (4.9 ± 1.3) × 10 -13 cm 3 molecule -1 s -1 in 700 Torr total pressure of air at 296 ± 2 K. The atmospheric lifetime of CF 3CH 2OCH 3 is estimated at 25 days. Reaction of Cl atoms with CF 3CH 2OCH 3 proceeds 79 ± 4% at the CH 3 group and 22 ± 2% at the CH 2 group. Reaction with OH radicals proceeds 55 ± 5% at the CH 3 group yielding CF 3CH 2OCHO and 45 ± 5% at the CH 2 group yielding COF 2 and CH 3OCHO as primary oxidation products. The infrared spectrum of CF 3CH(O)OCH 3 was measured and a global warming potential GWP 100 = 8 was estimated. The atmospheric chemistry and environmental impact of CF 3CH 2OCH 3 is discussed in context of the use of hydrofluoroethers as CFC substitutes.

AB - FTIR smog chamber techniques were used to measure k(Cl + CF 3CH 2OCH 3) = (2.28 ± 0.44) × 10 -11 and k(OH + CF 3CH 2OCH 3) = (4.9 ± 1.3) × 10 -13 cm 3 molecule -1 s -1 in 700 Torr total pressure of air at 296 ± 2 K. The atmospheric lifetime of CF 3CH 2OCH 3 is estimated at 25 days. Reaction of Cl atoms with CF 3CH 2OCH 3 proceeds 79 ± 4% at the CH 3 group and 22 ± 2% at the CH 2 group. Reaction with OH radicals proceeds 55 ± 5% at the CH 3 group yielding CF 3CH 2OCHO and 45 ± 5% at the CH 2 group yielding COF 2 and CH 3OCHO as primary oxidation products. The infrared spectrum of CF 3CH(O)OCH 3 was measured and a global warming potential GWP 100 = 8 was estimated. The atmospheric chemistry and environmental impact of CF 3CH 2OCH 3 is discussed in context of the use of hydrofluoroethers as CFC substitutes.

U2 - 10.1016/j.cplett.2011.12.047

DO - 10.1016/j.cplett.2011.12.047

M3 - Journal article

SN - 0009-2614

VL - 524

SP - 32

EP - 37

JO - Chemical Physics Letters

JF - Chemical Physics Letters

ER -

Atmospheric chemistry of CF3CH2OCH3: reaction with chlorine atoms and OH radicals, kinetics, degradation mechanism and global warming potential

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Atmospheric chemistry of CF₃CH₂OCH₃: reaction with chlorine atoms and OH radicals, kinetics, degradation mechanism and global warming potential