Production of N-containing hydrocarbon species in an afterglow plasma for simulation of Titan's atmosphere

Details Production of N-containing hydrocarbon species in an afterglow plasma for simulation of Titan's atmosphere Production of N-containing hydrocarbon species in an afterglow plasma for simulation of Titan's atmosphere

Sep 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008epsc.conf..946l&link_type=abstract

European Planetary Science Congress 2008, Proceedings of the conference held 21-25 September, 2008 in Münster, Germany. Online a

Physics

Scientific paper

We present the results from a kinetic model to simulate the afterglow of a flowing microwave discharge in pure N2 in which CH4 is introduced in the post-discharge at 10-2-1 ms with 2% percentage. The simulation is realized for a discharge operating at 433 MHz, in a tube of 1.9 cm inner radius, at the pressure range 26.6-106.4 Pa, which corresponds to Titan's stratosphere at altitudes 250-180 km. Here, the CH4 is primarily dissociated in CH3 and CH2 in the postdischarge, due to collisions with the metastable N2(A) coming from the discharge, while HCN is obtained from collisions of CH3 and CH2 with N atoms. The most populated species existing in Titan's atmosphere are then formed.

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