Vol. 11, No.2, pp.133-137 (2018)
Combined Electric Wind and Non-Thermal Plasma for Gas Cleaning
M. Schmidt, E. Timmermann, M. Kettlitz, and R. Brandenburg
Leibniz Institute for Plasma Science and Technology, Germany
Non-thermal plasma generated by sinusoidal driven surface discharges was utilized for generation of chemical active species and electric wind. The plasma reactor is used to remove methyl ethyl ketone (MEK) from humid artificial air (50% r.h.). A 70 % removal from 100 ppm MEK was achieved with the surface discharge alone operated at a specific input energy of SIE 0.67 kJ/L. Energizing the extraction electrode to generate electric wind increased the removal to 95 %. The decomposed MEK was mainly oxidized to CO2, CO and water. The applied electric wind also leads to significant deflection of smoke particles added to the gas stream. The deflecting electric wind, perpendicular to the gas stream, was found to reach velocities of up to 0.8 m/s. Furthermore, the measured velocities depend on the polarity of the extraction electrode because of the different ion mobilities for positive and negative ions in air.
Keywords - Non-thermal plasma, surface discharge, electric wind, MEK, odour removal