Carbon kinetic isotope effect in the oxidation of methane by the hydroxyl radical

Details Carbon kinetic isotope effect in the oxidation of methane by the hydroxyl radical Carbon kinetic isotope effect in the oxidation of methane by the hydroxyl radical

Dec 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990jgr....9522455c&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 95, Dec. 20, 1990, p. 22455-22462.

Physics

58

Atmospheric Chemistry, Carbon, Hydroxyl Radicals, Isotope Effect, Methane, Oxidation, Air Pollution, Temperature Dependence, Troposphere

Scientific paper

The reaction of the hydroxyl radical (HO) with the stable carbon isotopes of methane has been studied as a function of temperature from 273 to 353 K. The measued ratio of the rate coefficients for reaction with (C-12)H4 relative to (C-13)H4 (k12/k13) was 1.0054 (+ or - 0.0009 at the 95 percent confidence interval), independent of temperature within the precision of the measurement, over the range studied. The precision of the present value is much improved over that of previous studies, and this result provides important constraints on the current understanding of the cycling of methane through the atmosphere through the use of carbon isotope measurements.

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