|
|
Influence of water vapor on electrical discharge initiated processes in prebiotic atmospheres
Moravčík, Marek ; Chudják, Stanislav (referee) ; Krčma, František (advisor)
The aim of this work is to study the influence of water molecules on chemical processes initiated by electrical discharges in probiotic atmospheres. This work is focused on the simulation of nitrogen atmosphere and carbon dioxide atmosphere. These gases were chosen because they represent the main components of some known atmospheres (N2 the moon Titan, CO2 the planet Mars). A glow discharge generated in a special reactor at atmospheric pressure and a flow of pure N2 or CO2 was used for the simulation. Part of the measurement took place only in pure gas, into which water vapor with a flow rate of 0, 5, 10, 15 and 20 sccm was gradually introduced. In the second part of the measurement, the influence of admixtures was studied. In the case of an N2 atmosphere, methane flow rates of 2 and 4 sccm were used. In the case of an atmosphere with CO2, the nitrogen flow is 2 and 4 sccm. Again, the analysis of the effect of water was carried out for all created atmospheres. The products formed were analysed using proton ionization mass spectrometry and a time-of-flight analyser. Simple aliphatic hydrocarbons, alcohols, aldehydes and ketones were detected. As the number of additives increased, more complex aromatic substances were also formed. At the same time, plasma diagnostics was carried out using optical emission spectroscopy.
|
guest ::
