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. Sulbaek 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. Sulbaek Andersen, Timothy J. Wallington

^*Corresponding author for this work

Environment and Geography

Research output: Contribution to journal › Article › peer-review

Abstract

FTIR smog chamber techniques were used to measure k(Cl + CF₃CH₂OCH₃) = (2.28 ± 0.44) × 10^-11 and k(OH + CF₃CH₂OCH₃) = (4.9 ± 1.3) × 10^-13 cm³ molecule^-1 s^-1 in 700 Torr total pressure of air at 296 ± 2 K. The atmospheric lifetime of CF₃CH₂OCH₃ is estimated at 25 days. Reaction of Cl atoms with CF₃CH₂OCH₃ proceeds 79 ± 4% at the CH₃ group and 22 ± 2% at the CH₂ group. Reaction with OH radicals proceeds 55 ± 5% at the CH₃ group yielding CF₃CH₂OCHO and 45 ± 5% at the CH₂ group yielding COF₂ and CH₃OCHO as primary oxidation products. The infrared spectrum of CF₃CH(O)OCH₃ was measured and a global warming potential GWP ₁₀₀ = 8 was estimated. The atmospheric chemistry and environmental impact of CF₃CH₂OCH₃ is discussed in context of the use of hydrofluoroethers as CFC substitutes.

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

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@article{edadd4bb23834ea6a292ae68e75be529,

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 + CF3CH2OCH3) = (2.28 ± 0.44) × 10-11 and k(OH + CF3CH2OCH3) = (4.9 ± 1.3) × 10-13 cm3 molecule-1 s-1 in 700 Torr total pressure of air at 296 ± 2 K. The atmospheric lifetime of CF3CH2OCH3 is estimated at 25 days. Reaction of Cl atoms with CF3CH2OCH3 proceeds 79 ± 4% at the CH3 group and 22 ± 2% at the CH2 group. Reaction with OH radicals proceeds 55 ± 5% at the CH3 group yielding CF3CH2OCHO and 45 ± 5% at the CH2 group yielding COF2 and CH3OCHO as primary oxidation products. The infrared spectrum of CF3CH(O)OCH3 was measured and a global warming potential GWP 100 = 8 was estimated. The atmospheric chemistry and environmental impact of CF3CH2OCH3 is discussed in context of the use of hydrofluoroethers as CFC substitutes.",

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

year = "2012",

month = feb,

day = "6",

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

language = "English",

volume = "524",

pages = "32--37",

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 - Sulbaek Andersen, Mads P.

AU - Wallington, Timothy J.

PY - 2012/2/6

Y1 - 2012/2/6

N2 - FTIR smog chamber techniques were used to measure k(Cl + CF3CH2OCH3) = (2.28 ± 0.44) × 10-11 and k(OH + CF3CH2OCH3) = (4.9 ± 1.3) × 10-13 cm3 molecule-1 s-1 in 700 Torr total pressure of air at 296 ± 2 K. The atmospheric lifetime of CF3CH2OCH3 is estimated at 25 days. Reaction of Cl atoms with CF3CH2OCH3 proceeds 79 ± 4% at the CH3 group and 22 ± 2% at the CH2 group. Reaction with OH radicals proceeds 55 ± 5% at the CH3 group yielding CF3CH2OCHO and 45 ± 5% at the CH2 group yielding COF2 and CH3OCHO as primary oxidation products. The infrared spectrum of CF3CH(O)OCH3 was measured and a global warming potential GWP 100 = 8 was estimated. The atmospheric chemistry and environmental impact of CF3CH2OCH3 is discussed in context of the use of hydrofluoroethers as CFC substitutes.

AB - FTIR smog chamber techniques were used to measure k(Cl + CF3CH2OCH3) = (2.28 ± 0.44) × 10-11 and k(OH + CF3CH2OCH3) = (4.9 ± 1.3) × 10-13 cm3 molecule-1 s-1 in 700 Torr total pressure of air at 296 ± 2 K. The atmospheric lifetime of CF3CH2OCH3 is estimated at 25 days. Reaction of Cl atoms with CF3CH2OCH3 proceeds 79 ± 4% at the CH3 group and 22 ± 2% at the CH2 group. Reaction with OH radicals proceeds 55 ± 5% at the CH3 group yielding CF3CH2OCHO and 45 ± 5% at the CH2 group yielding COF2 and CH3OCHO as primary oxidation products. The infrared spectrum of CF3CH(O)OCH3 was measured and a global warming potential GWP 100 = 8 was estimated. The atmospheric chemistry and environmental impact of CF3CH2OCH3 is discussed in context of the use of hydrofluoroethers as CFC substitutes.

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U2 - 10.1016/j.cplett.2011.12.047

DO - 10.1016/j.cplett.2011.12.047

M3 - Article

AN - SCOPUS:84856102672

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