Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1775428 | Icarus | 2007 | 11 Pages |
Abstract
The reactivity of C2(X1Σ+g) with simple saturated (CH4, C2H6 and C3H8) and unsaturated (C2H2 and C2H4) hydrocarbons has been studied in the gas phase over the temperature range 24-300 K using the CRESU (Cinétique de Réaction en Ecoulement Supersonique Uniforme or Reaction Kinetics in a Uniform Supersonic Flow) technique. All reactions have been found to be very rapid in this temperature range and the rate coefficients are typically ⩾10â10 cm3âmoleculeâ1âsâ1 with the exception of methane for which the rate coefficient is one order of magnitude lower: â¼10â11 cm3âmoleculeâ1âsâ1. These results have been analyzed in terms of potential destruction sources of C2(X1Σ+g) in the atmospheres of Titan and the Giant Planets. It appears that the rate coefficient of the reaction 1C2 + CH4 should be updated with our new data and that reactions with C2H2, C2H4 and C2H6 should also be included in the existing photochemical models.
Related Topics
Physical Sciences and Engineering
Earth and Planetary Sciences
Space and Planetary Science
Authors
André Canosa, Alejandra Páramo, Sébastien D. Le Picard, Ian R. Sims,