Kinetics of the reactions of CF sub 2 ClO sub 2 radicals with nitrogen dioxide

Journal Article · Thu Feb 22 04:00:00 EST 1990 · Journal of Physical Chemistry; (USA)

DOI:https://doi.org/10.1021/j100367a036· OSTI ID:6663796

Moore, S B; Carr, R W ^[1]

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1. Univ. of Minnesota, Minneapolis (USA)

The kinetics of the reaction of CF{sub 2}ClO{sub 2} radicals with NO{sub 2} at 298 K, investigated by flash photolysis with time-resolved mass spectrometry, are reported. The peroxy radical, CF{sub 2}ClO{sub 2}, was formed in broadband flash photolysis of CF{sub 2}ClBr in the presence of O{sub 2} and detected mass spectrometrically via the fragment ion, CF{sub 2}O{sub 2}{sup +}. With NO{sub 2} present, peroxy radical decay occurs by pseudo-first-order kinetics. The decay rates are also first order in NO{sub 2}. The second-order rate coefficients are pressure dependent over the 1-10 Torr experimental range. The pressure-dependent rate coefficients were fitted by the Troe expression for termolecular reactions. Numerical simulation of the peroxy radical decay rates, using a mechanism consisting of known reactions that also occur in this system, were done to investigate the influence of secondary reactions on the measured rates.

• OSTI ID: 6663796
• Journal Information: Journal of Physical Chemistry; (USA), Journal Name: Journal of Physical Chemistry; (USA) Vol. 94:4; ISSN 0022-3654; ISSN JPCHA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
54 ENVIRONMENTAL SCIENCES
540120 -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (1990-)
ATMOSPHERIC CHEMISTRY
CALCULATION METHODS
CHALCOGENIDES
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
CHEMISTRY
DATA
DATA ANALYSIS
DECOMPOSITION
EARTH ATMOSPHERE
EXPERIMENTAL DATA
INFORMATION
KINETICS
MATHEMATICS
MEASURING INSTRUMENTS
MEASURING METHODS
NITROGEN COMPOUNDS
NITROGEN DIOXIDE
NITROGEN OXIDES
NUMERICAL ANALYSIS
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
OZONE
PEROXY RADICALS
PHOTOCHEMICAL REACTIONS
PHOTOLYSIS
RADICALS
REACTION KINETICS
STRATOSPHERE