Temperature dependence of the gas phase reactions of CF[sub 3]O with CH[sub 4] and NO

Journal Article · Thu Aug 25 04:00:00 EDT 1994 · Journal of Physical Chemistry; (United States)

DOI:https://doi.org/10.1021/j100085a042· OSTI ID:7012012

Jensen, N R ^[1]; Hanson, D R ^[2]; Howard, C J ^[3]

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1. Natioanl Oceanic and Atmospheric Administration, Boulder, CO (United States) Danish Natural Science Research Council, Copenhagen (Denmark)
2. Natioanl Oceanic and Atmospheric Administration, Boulder, CO (United States) Univ. of Colorado, Boulder, CO (United States)
3. National Oceanic and Atmospheric Administration, Boulder, CO (United States)

A temperature-regulated flow tube reactor coupled to a chemical ionization mass spectrometer (CIMS) was used to investigate reactions of CF[sub 3]O with CH[sub 4] and NO. The reaction rate for the CF[sub 3]O + CH[sub 4] reaction was measured in the temperature range 231-385 K and found to be k[sub 3](T) = (3.1 [+-] 0.5) x 10[sup [minus]12] exp[([minus]1470 [+-] 250) K/T]cm[sup 3] molecule[sup [minus]1] s[sup [minus]1], with k[sub 3](298 K) = (2.2 [+-] 0.4) x 10[sup [minus]14] cm[sup 3] molecule[sup [minus]1] (where the uncertainties represent our estimated accuracy at the 95 % confidence level). The latter is in good agreement with recently reported measurements at room temperature. The reaction rate constant for the CF[sub 3]O + NO reaction was measured in the temperature range 231-393 K and found to be k[sub 4](T) = (4.1 [+-] 0.6) x 10[sup [minus]11] disagrees with two previously reported values by a factor of about 2.5 but is in good agreement with three recently reported values. The results reported in this study are important in establishing the fate of the CF[sub 3]O[sub x] radicals produced as degradation products from hydrofluorocarbons (HFC's) in the atmosphere. 32 refs., 6 figs., 4 tabs.

• OSTI ID: 7012012
• Journal Information: Journal of Physical Chemistry; (United States), Journal Name: Journal of Physical Chemistry; (United States) Vol. 98:34; ISSN JPCHAX; ISSN 0022-3654
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400102 -- Chemical & Spectral Procedures
400201 -- Chemical & Physicochemical Properties
54 ENVIRONMENTAL SCIENCES
540120* -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (1990-)
ALCOHOLS
ALKANES
ATMOSPHERIC CHEMISTRY
CHALCOGENIDES
CHEMICAL REACTIONS
CHEMISTRY
COMPILED DATA
DATA
GLYCOLS
HYDROCARBONS
HYDROXY COMPOUNDS
INFORMATION
KINETICS
MASS SPECTROSCOPY
METHANE
METHANOL
NITRIC OXIDE
NITROGEN COMPOUNDS
NITROGEN OXIDES
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC FLUORINE COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
RADICALS
REACTION KINETICS
SPECTROSCOPY
TEMPERATURE DEPENDENCE