Kinetics of the reaction OH+CO under atmospheric conditions

Details Kinetics of the reaction OH+CO under atmospheric conditions Kinetics of the reaction OH+CO under atmospheric conditions

Aug 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001georl..28.3135m&link_type=abstract

Geophysical Research Letters, Volume 28, Issue 16, p. 3135-3138

Physics

10

Atmospheric Composition And Structure: Chemical Kinetic And Photochemical Properties, Atmospheric Composition And Structure: Middle Atmosphere-Composition And Chemistry

Scientific paper

The rate coefficients for the reaction of OH with CO, k1, at pressures of 50-750 Torr from 220 K to 400 K, in He, N2, and air, are reported to be k1=(1.57×10-13+3.54×10-33×[M])cm3molecule-1 s- with [M] in molecule cm-3. k1 increases linearly with the bath gas number density; this increase is independent of temperature. k1, at a given temperature and number density, is the same in N2, dry air, and mixtures of O2 (up to 49%) and N2. The presence of water vapor does not significantly alter k1 under atmospheric conditions. The uncertainty in our value of k1 is +/-15%, at the 95% confidence level, at any given [M] and temperature, which is smaller than the currently recommended uncertainty by a factor of four or more. Our k1 values are compared with previous data and their atmospheric implications are discussed.

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