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Organic chemistry of NH3 and HCN induced by an atmospheric abnormal glow discharge in N2-CH4 mixtures

Published online by Cambridge University Press:  23 December 2010

G. Horvath ,
F. Krcma ,
L. Polachova ,
K. Klohnova ,
N. J. Mason ,
M. Zahoran  and
S. Matejcik
G. Horvath*
Affiliation:
Department of Experimental Physics, Comenius University, Mlynska dolina F2, 84248 Bratislava, Slovakia Department of Physics and Astronomy, The Open University, Walton Hall, MK7 6AA, Milton Keynes, UK
F. Krcma
Affiliation:
Brno University of Technology, Faculty of Chemistry, Purkynova 118, 61200 Brno, Czech Republic
L. Polachova
Affiliation:
Department of Physics and Astronomy, The Open University, Walton Hall, MK7 6AA, Milton Keynes, UK Brno University of Technology, Faculty of Chemistry, Purkynova 118, 61200 Brno, Czech Republic
K. Klohnova
Affiliation:
Brno University of Technology, Faculty of Chemistry, Purkynova 118, 61200 Brno, Czech Republic
N. J. Mason
Affiliation:
Department of Physics and Astronomy, The Open University, Walton Hall, MK7 6AA, Milton Keynes, UK
M. Zahoran
Affiliation:
Department of Experimental Physics, Comenius University, Mlynska dolina F2, 84248 Bratislava, Slovakia
S. Matejcik
Affiliation:
Department of Experimental Physics, Comenius University, Mlynska dolina F2, 84248 Bratislava, Slovakia
*
horeszka@gmail.com
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Abstract

The formation of the chemical products produced in an atmospheric glow discharge fed by a N2-CH4 gas mixture has been studied using Fourier Transform InfraRed (FTIR) and Optical Emission Spectrometry (OES). The measurements were carried out in a flowing regime at ambient temperature and pressure with CH4 concentrations ranging from 0.5% to 2%. In the recorded emission spectra the lines of the second positive system CN system and the first negative system of N2 were found to be the most intensive but atomic H$^{\alpha}$, H$^{\beta}$, and C (247 nm) lines were also observed. FTIR-measurements revealed HCN and NH3 to be the major products of the plasma with traces of C2H2. These same molecules have been detected in Titan's atmosphere and the present experiments may provide some novel insights into the chemical and physical mechanisms prevalent in Titan's atmosphere with these smaller species believed to be the precursors of heavier organic species in Titan's atmosphere and on its surface.

Type
Research Article
Information
The European Physical Journal - Applied Physics , Volume 53 , Issue 1 , January 2011 , 11001
Copyright
© EDP Sciences, 2010

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