Mazankova Vera

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Experiments with DC gliding discharge fed by CH4-N2 and admixtures for simulation of prebiotic atmosphere

Vera Mazankova

Faculty of Chemistry, Brno University of Technology, Czech Republic


Host: Prof Stefan Matejcik
Faculty of Mathematics, Physics and Informatics, Comenius
University in Bratislava

During my scientific stay at Comenius University in Bratislava I performed experiments with DC gliding discharge fed by CH4-N2 and addition of water vapor. These experiments extended our previous experimental studies of the chemistry of Titan’s atmosphere using atmospheric glow discharge. Two diagnostic methods were used in the experiments: Corona Discharge Ion Mobility Spectrometry (CD IMS) and Fourier Transform Infra Red spectroscopy (FTIR).
Obtained experimental results were continuously consulted with prof. Matejcik and his team. The results will be compared with previous results and will be prepared for future publication in scientific journal. Based on these results the kinetic model is developing. The experiment is described in more details in our previous publications [1]. The concentrations of HCN and NH3 were calculated from obtained IR spectra. Hydrogen cyanide (HCN) was found to be the most abundant product at wavenumbers of 720 cm-1. Ammonia (NH3) was identified at 966 cm-1. The other major products were acetylene (C2H2) as well as carbon monoxide (CO) and water (H2O).
These products were recognized in all gas mixtures. The dependencies on of ammonia and hydrogen cyanide concentrations on discharge current for different gas mixtures have no significant changes with water addition. The dependencies have the same trend which was described in our last study [1].

[1] V. Mazankova, L. Torokova, F. Krcma, N. J. Mason, S. Matejcik, The Influence of CO2
Admixtures on the Product Composition in a Nitrogen-Methane Atmospheric Glow Discharge
Used as a Prebiotic Atmosphere Mimic, Orig Life Evol Biosph 46 (2016) 499–506.






CSO Approval date: 14/11/2013
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