Students

Bc. level: 2020 - 2021
Supervisor: Karol Hensel
Title (en):
Decontamination of respirators by surface dielectric barrier discharge
Title (sk):
Dekontaminácia respirátorov pomocou povrchového dielektrického bariérového výboja
Abstract (en)
Abstract (sk)

MSc. level: 2021 - 2023
Supervisor: Karol Hensel
Consultant: Richard Cimerman
Title (en):
Surface discharge in perforated ceramics
Title (sk):
Povrchový výboj v perforovaných keramikách
Abstract (en):  hide
The diploma thesis describes the physical properties and chemical effects of a dielectric barrier discharge (DBD) generated in a perforated ceramic element and evaluates its potential for possible plasma treatment of gases polluted with low concentrations of pollutants. Experimental measurements were used to evaluate the physical properties of the investigated discharge under different operating conditions. We investigated the influence of the frequency of the applied high voltage (in the interval 0.5 - 2 kHz), the composition of the gas mixture containing nitrogen and oxygen (in gas ratios 80:20, 75:25 and 25:75) and the gas flow rate (in the interval 0.5 - 2 l/min). For all measurements, the discharge was generated at a fixed applied voltage of 6.7 kV. We investigated the influence of the above parameters on the discharge power, which was determined by the method of Lissaujous patterns, on the concentrations of generated ozone O3 and nitrous oxide N2O, which were measured by infrared absorption spectroscopy. The experimental results showed that the discharge exhibited maximum chemical activity at a frequency of 2 kHz, a flow rate of 0.5 l/min in a N2/O2 gas mixture of 25:275, where the measured O3 concentration was 4027 ± 227 ppm.
Abstract (sk)