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

Kemisk Institut

16 Citationer (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.

Originalsprog	Engelsk
Tidsskrift	Chemical Physics Letters
Vol/bind	524
Sider (fra-til)	32-37
Antal sider	6
ISSN	0009-2614
DOI	https://doi.org/10.1016/j.cplett.2011.12.047
Status	Udgivet - 6 feb. 2012

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10.1016/j.cplett.2011.12.047

Citationsformater

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.

I: Chemical Physics Letters, Bind 524, 06.02.2012, s. 32-37.

Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › peer review

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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.",

author = "{\O}sterstr{\o}m, {Freja From} and Nielsen, {Ole John} and Andersen, {Mads P. Sulb{\ae}k} and Wallington, {Timothy J.}",

year = "2012",

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doi = "10.1016/j.cplett.2011.12.047",

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journal = "Chemical Physics Letters",

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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

Abstract

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