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Kinetics of the gas‐phase reaction of CF 3 CF 2 CH 2 OH with OH radicals and its atmospheric lifetime
Author(s) -
Chen L.,
Fukuda K.,
Takenaka N.,
Bandow H.,
Maeda Y.
Publication year - 2000
Publication title -
international journal of chemical kinetics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.341
H-Index - 68
eISSN - 1097-4601
pISSN - 0538-8066
DOI - 10.1002/(sici)1097-4601(2000)32:2<73::aid-kin1>3.0.co;2-v
Subject(s) - chemistry , radical , kinetics , chlorofluorocarbon , gas phase , troposphere , gas chromatography , mass spectrometry , atmospheric chemistry , chemical kinetics , analytical chemistry (journal) , atmospheric temperature range , atmospheric pressure , environmental chemistry , chromatography , thermodynamics , organic chemistry , meteorology , ozone , physics , quantum mechanics
CF 3 CF 2 CH 2 OH is a new chlorofluorocarbon (CFC) alternative. However, there are few data about its atmospheric fate. The kinetics of its atmospheric oxidation, the OH radical reaction of CF 3 CF 2 CH 2 OH, has been investigated in a 2‐liter Pyrex reactor in the temperature range of 298 ∼ 356 K using gas chromatography (GC)–mass spectrometry (MS) for analysis in this study. The rate coefficient of k 1 = (2.27 −0.76 +1.15 ) × 10 −12 exp[−(900 ± 70)/ T ] cm 3 molecule −1 s −1 was determined using the relative rate method. The results are in good agreement with the literature values and the prediction of Atkinson's structure–activity relationship (SAR) model. From these results, the atmospheric lifetime of CF 3 CF 2 CH 2 OH in the troposphere was deduced to be 0.34 year, which is 250 and 6 times shorter than those of CFC‐113 and hydrochlorofluorocarbons (HCFC‐225ca), respectively. Therefore CF 3 CF 2 CH 2 OH has significant potential for the replacement of CFC‐113 and HCFC‐225ca. © 2000 John Wiley & Sons, Inc. Int J Chem Kinet 32: 73–78, 2000