title: The Influence of CO2Admixtures on the Product Composition in a Nitrogen-Methane Atmospheric Glow Discharge Used as a Prebiotic Atmosphere Mimic.
abstract: This work extends our previous experimental studies of the chemistry of Titan's atmosphere by atmospheric glow discharge. The Titan's atmosphere seems to be similarly to early Earth atmospheric composition. The exploration of Titan atmosphere was initiated by the exciting results of the Cassini-Huygens mission and obtained results increased the interest about prebiotic atmospheres. Present work is devoted to the role of CO2in the prebiotic atmosphere chemistry. Most of the laboratory studies of such atmosphere were focused on the chemistry of N2+ CH4mixtures. The present work is devoted to the study of the oxygenated volatile species in prebiotic atmosphere, specifically CO2reactivity. CO2was introduced to the standard N2+ CH4mixture at different mixing ratio up to 5 % CH4and 3 % CO2. The reaction products were characterized by FTIR spectroscopy. This work shows that CO2modifies the composition of the gas phase with the detection of oxygenated compounds: CO and others oxides. There is a strong influence of CO2on increasing concentration other products as cyanide (HCN) and ammonia (NH3).
authors.affiliation: Faculty of Chemistry, Brno University of Technology, Purkynova 119, 612 00, Brno, Czech Republic. mazankova@fch.vutbr.cz.
authors.forename: V
authors.initials: V
authors.lastname: Mazankova
authors.affiliation: Faculty of Chemistry, Brno University of Technology, Purkynova 119, 612 00, Brno, Czech Republic.|Department of Physics and Astronomy, Open University, Walton Hall, Milton Keynes, MK7 6AA, UK.
authors.forename: L
authors.initials: L
authors.lastname: Torokova
authors.affiliation: Faculty of Chemistry, Brno University of Technology, Purkynova 119, 612 00, Brno, Czech Republic.
authors.forename: F
authors.initials: F
authors.lastname: Krcma
authors.affiliation: Department of Physics and Astronomy, Open University, Walton Hall, Milton Keynes, MK7 6AA, UK.
authors.forename: N J
authors.initials: NJ
authors.lastname: Mason
authors.affiliation: Department of Experimental Physics, Comenius University, Mlynska dolina F-2, 842 48, Bratislava, Slovakia.
authors.forename: S
authors.initials: S
authors.lastname: Matejcik
mesh_terms: D001272:Atmosphere / Q000737:chemistry*; D002245:Carbon Dioxide / Q000737:chemistry*; D019419:Evolution, Planetary; D005118:Extraterrestrial Environment; D008697:Methane / Q000737:chemistry*; D009584:Nitrogen / Q000737:chemistry*; D000069497:Origin of Life; D017550:Spectroscopy, Fourier Transform Infrared
chemical_list: D002245:Carbon Dioxide; D009584:Nitrogen; D008697:Methane
keywords: Atmospheric glow discharge; FTIR spectroscopy; Prebiotic atmosphere