Atmospheric chemistry of CH2FOCH2F:: Reaction with Cl atoms and atmospheric fate of CH2FOCHFO• radicals

被引:12
作者
Goto, M
Kawasaki, M [1 ]
Wallington, TJ
Hurley, MD
Sharratt, AP
机构
[1] Kyoto Univ, Dept Mol Engn, Kyoto 6068501, Japan
[2] Ford Motor Co, Ford Res Lab, SRL 3083, Dearborn, MI 48121 USA
[3] Ineos Fluor, Runcorn WA7 4QF, Cheshire, England
关键词
D O I
10.1002/kin.10038
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Smog chamber/FTIR techniques were used to study the Cl atom initiated oxidation of CH2FOCH2F in 700 Torr of N-2/O-2 at 296 K Relative rate techniques were used to measure k(Cl + CH2FOCH2F) = (4.6 +/- 0.7) x 10(-13) and k(Cl + CH2FOC(O)F) = (2.9 +/- 0.8) x 10(-15) (in units of cm(3) molecule(-1) s(-1)). Three competing fates for alkoxy radical CH2FOCHFO. formed in the self-reaction of the corresponding peroxy radicals were identified. In 1 atm of air at 296 K, 48 +/- 3% of CH2FOCHFO. radicals decompose via C-O bond scission, 21 +/- 4% react with O-2, and 31 +/- 4% undergo hydrogen atom elimination. Chemical activation effects were observed for CH2FOCHFO. radicals formed in the CH2FOCHFOO. + NO reaction Infrared spectra of CH2FOC(O)F and FC(O)OC(O)F, which are produced during the Cl atom initiated oxidation of CH2FOCH2F, are presented. (C) 2002 Wiley Periodicals, Inc.
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页码:139 / 147
页数:9
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