Non-thermal plasma and catalyst system for indoor VOC removal

Indoor air quality control has received a lot of attention in recent years. Since clean indoor air cannot be secured by ventilation alone, the development of air purification technology is being actively carried out.

Specially, volatile organic compound (VOC) is one of the main substances to be removed because it caused directly damage to human health as well as stink odor. Plasma device not only removes VOCs, but also creates harmful ozone.

In this study, surface dielectric barrier discharge (SDBD) plasma devices and catalyst are applied to remove VOC in air minimizing ozone generation by changing plasma electrode configuration and applying catalyst after plasma reactor.

SDBD electrode with multiple triangular point tips are prepared and toluene was selected as a VOC material. Removal efficiencies are evaluated according to different electrode configuration in plasma chamber and applied voltage. Also to improve VOC removal efficiency and reduce ozone generation manganese oxide catalyst was applied after plasma reactor.