Kinetics of the heterogeneous reaction CO+O->CO2 on inorganic oxide and water ice surfaces: Implications for the Martian atmosphere

Details Kinetics of the heterogeneous reaction CO+O->CO2 on inorganic oxide and water ice surfaces: Implications for the Martian atmosphere Kinetics of the heterogeneous reaction CO+O->CO2 on inorganic oxide and water ice surfaces: Implications for the Martian atmosphere

Dec 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997georl..24.2957c&link_type=abstract

Geophysical Research Letters, Volume 24, Issue 23, p. 2957-2960

Mathematics

Probability

3

Planetology: Solid Surface Planets: Atmospheres-Composition And Chemistry, Planetology: Solar System Objects: Mars, Atmospheric Composition And Structure: Chemical Kinetic And Photochemical Properties, Atmospheric Composition And Structure: Planetary Atmospheres

Scientific paper

The heterogeneous reaction CO+O->CO2 on water ice and various inorganic oxide (SiO2, Al2O3, Fe2O3, Fe3O4, CaO, MgO, and TiO2) surfaces has been investigated in order to evaluate the proposition that this heterogeneous reaction may contribute to the CO2 stability in the Martian atmosphere. The reaction probabilities were measured at both 196 K and 294 K by using a fast flow-tube reactor coupled to an electron-impact ionization mass spectrometer. The atomic oxygen was generated by passing a mixture of O2 and He through a microwave discharge at a side-arm inlet and then allowed to react with CO over these substrates in the reactor. The reaction product, CO2, was monitored as a function of time at the downstream end of the flow-tube reactor. The measured reaction probabilities were determined from the growth rates of CO2 signal and were found to range from 1.6×10-7 to 1.0×10-5 on the basis of the geometric area of the reactor. If we adopt a typical reaction probability of 5×10-7 for the heterogeneous CO+O reaction on Martian aerosols at 196 K, a simple calculation suggests that this mechanism plays a negligible role in CO2 recycling as compared to that of the homogeneous CO+OH reaction.

Affiliated with

Also associated with

No associations

Rating

Kinetics of the heterogeneous reaction CO+O->CO2 on inorganic oxide and water ice surfaces: Implications for 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 Kinetics of the heterogeneous reaction CO+O->CO2 on inorganic oxide and water ice surfaces: Implications for the Martian atmosphere, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Kinetics of the heterogeneous reaction CO+O->CO2 on inorganic oxide and water ice surfaces: Implications for the Martian atmosphere will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-894189