Long path FTIR spectroscopic study of the reactions of CF[sub 3]O radicals with ethane and propane

Journal Article · Fri Nov 20 00:00:00 EST 1992 · Geophysical Research Letters (American Geophysical Union); (United States)

DOI:https://doi.org/10.1029/92GL02496· OSTI ID:6764310

Chen, J; Zhu, T; Niki, H ^[1]; Mains, G J ^[2]

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1. York Univ., North York, Ontario (Canada)
2. Oklahoma State Univ., Stillwater (United States)

A long path FTIR-based product study was carried out by the visible ([lambda] > 400 nm) photolysis of mixtures containing CF[sub 3]NO, NO and ethane or propane (in mtorr range) in 700 torr of synthetic air at 297 [plus minus] 2 K. Kinetic and spectroscopic evidence has been obtained for the reaction (1), CF[sub 3]O + RH [yields] CF[sub 3]OH + R (RH = C[sub 2]H[sub 6] or C[sub 3]H[sub 8]). Using the reaction (2), CF[sub 3]O + NO [yields] CF[sub 2]O + FNO as the reference reaction, values for the relative rate constants k[sub 2]/k[sub 1] were determined to be 50 [plus minus] 15([sigma]) and 20 [plus minus] 5([sigma]) for C[sub 2]H[sub 6] and C[sub 3]H[sub 8], respectively. These results suggest that the hydrocarbon reactions may provide a significant pathway for the tropospheric degradation of HFCs and HCFCs containing a CF[sub 3] group. 15 refs., 6 figs., 1 tab.

• OSTI ID: 6764310
• Journal Information: Geophysical Research Letters (American Geophysical Union); (United States), Vol. 19:22; ISSN 0094-8276
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
ETHANE
PHOTOLYSIS
PROPANE
AIR
ATMOSPHERIC CHEMISTRY
CHEMICAL REACTION KINETICS
FLUORINE COMPOUNDS
LOW PRESSURE
METHOXY RADICALS
MIXTURES
NITROGEN OXIDES
RADICALS
SPECTROSCOPY
TEMPERATURE RANGE 0273-0400 K
ALKANES
ALKOXY RADICALS
CHALCOGENIDES
CHEMICAL REACTIONS
CHEMISTRY
DECOMPOSITION
DISPERSIONS
FLUIDS
GASES
HALOGEN COMPOUNDS
HYDROCARBONS
KINETICS
NITROGEN COMPOUNDS
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PHOTOCHEMICAL REACTIONS
REACTION KINETICS
TEMPERATURE RANGE
540120* - Environment
Atmospheric- Chemicals Monitoring & Transport- (1990-)
400500 - Photochemistry