Kinetics of the gas-phase reactions of NO/sub 3/ radicals with a series of alkanes at 296 +/- 2 K

Journal Article · Thu May 24 00:00:00 EDT 1984 · J. Phys. Chem.; (United States)

DOI:https://doi.org/10.1021/j150655a035· OSTI ID:6635645

Atkinson, R; Plum, C N; Carter, W P.L.; Winer, A M; Pitts, Jr, J N

Relative rate constants for the gas-phase reactions of the NO/sub 3/ radical, an important reactive species observed in nighttime atmospheres, with a series of alkanes have been determined at 296 +/- 2 K. Using a rate constant for the reaction of NO/sub 3/ radicals with ethene of (6.1 +/- 2.6) X 10/sup -17/ cm/sup 3/ molecule/sup -1/ s/sup -1/, the following rate constants (in units of 10/sup -17/ cm/sup 3/ molecule/sup -1/ s/sup -1/) were obtained: n-butane, 2.0 +/- 1.0; n-pentane, 2.4 +/- 1.2; n-hexane, 3.2 +/- 1.5; n-heptane, 4.1 +/- 1.8; n-octane, 5.5 +/- 2.5; n-nonane, 1.2 +/- 3.3; isobutane, 2.9 +/- 1.4; 2,3-dimethylbutane, 12.1 +/- 5.4; and cyclohexane, 4.0 +/- 1.9. These data, which are the first to be reported for the reaction of NO/sub 3/ radicals with alkanes, indicate that these reactions are a minor loss process for alkanes in the troposphere, relative to daytime hydroxyl radical attack, but that they may play a role in the formation of nitric acid, a key constituent of acid deposition, during nighttime hours in polluted atmospheres.

• Research Organization: Univ. of California, Riverside
• OSTI ID: 6635645
• Journal Information: J. Phys. Chem.; (United States), Journal Name: J. Phys. Chem.; (United States) Vol. 88:11; ISSN JPCHA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
400301 -- Organic Chemistry-- Chemical & Physicochemical Properties-- (-1987)
500200 -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
ALKANES
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
DATA
EXPERIMENTAL DATA
FLUIDS
GASES
HYDROCARBONS
INFORMATION
KINETICS
NITRATES
NITROGEN COMPOUNDS
NUMERICAL DATA
ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
RADICALS
REACTION KINETICS