Recombination rates of O and CO on solid CO2 Implications for the composition of the Martian atmosphere

Details Recombination rates of O and CO on solid CO2 Implications for the composition of the Martian atmosphere Recombination rates of O and CO on solid CO2 Implications for the composition of the Martian atmosphere

Apr 1975

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975p%26ss...23..661s&link_type=abstract

Planetary and Space Science, vol. 23, Apr. 1975, p. 661-669. Research supported by the Alfred P. Sloan Foundation

Physics

1

Carbon Dioxide, Mars Atmosphere, Oxygen Atoms, Reaction Kinetics, Recombination Coefficient, Solidified Gases, Carbon Monoxide, Carbon 14, Low Temperature Environments, Mars Surface, Polar Caps, Surface Reactions

Scientific paper

n atomic oxygen flow system and a C14 radiochemical technique have been used to show that the reactions O + CO --> CO2 and O + O --> O2, are heterogeneously catalysed by solid CO2 at 77 K. The O-CO recombination is first order in CO and inhibited by O, whereas the O-O recombination is first order in O and weakly inhibited by CO. Assuming simple first order kinetics, recombination coefficients γco = 1.3(+/-0.9) × 10-5 and γO = 0.05+/- 0.02 are determined. A recombination mechanism involving an intermediate adsorbed CO3 is proposed. If the kinetic results are assumed to apply under Martian surface conditions, then conversion of CO to CO2 by reaction on the solid CO2 at the polar caps occurs at ~10 times the total column recombination rates for homogeneous reactions previously proposed; night-side CO2 ice clouds would also constitute an important recombination surface. Alfred P. Sloan Foundation Fellow.

Affiliated with

Also associated with

No associations

Rating

Recombination rates of O and CO on solid CO2 Implications for the composition of the Martian atmosphere does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Recombination rates of O and CO on solid CO2 Implications for the composition of the Martian atmosphere, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Recombination rates of O and CO on solid CO2 Implications for the composition of the Martian atmosphere will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-948860