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Kinetics of the gas-phase reaction of CF3CF2CH2OH with OH radicals and its atmospheric lifetime

✍ Scribed by L. Chen; K. Fukuda; N. Takenaka; H. Bandow; Y. Maeda

Publisher: John Wiley and Sons
Year: 2000
Tongue: English
Weight: 79 KB
Volume: 32
Category: Article
ISSN: 0538-8066
DOI: 10.1002/(sici)1097-4601(2000)32:2<73::aid-kin1>3.0.co;2-v

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✦ Synopsis

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 ϳ 356 K using gas chromatography (GC)-mass spectrometry (MS) for analysis in this study. The rate coefficient of

(2.27 ) Ϫ0.76

s Ϫ1 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.

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