Ozone is usually produced by the dielectric barrier discharge (DBD) method. The dielectric barrier discharge can be divided into two categories: volume discharge and surface discharge. In the surface discharge, a ceramic plate is used as a dielectric barrier. As an advanced form of single SDBD, double SDBD was proposed, in which striped electrodes were coated on both sides of the ceramic plate. Double SDBD can simultaneously generate two plasma zones on both sides of the ceramic plate to improve energy efficiency compared to single SDBD. However, it is difficult to realize the cooling of the discharge device.
A previous study proposed a double SDBD reactor in which two silver mesh electrodes were coated on one side of an enameled steel plate. However, an enameled steel plate is easy to deform during the fabrication process and it is difficult to make the discharge device larger. In addition, a silver electrode is not practical because of its low resistance to the oxidation of ozone.
Kim Jong Guk, a researcher at the Institute of Nano Science and Technology, has proposed a cylindrical double SDBD device.
The proposed discharge device can simultaneously produce ozone at both the high voltage electrode and the grounded electrode, thus showing great advantages in getting high ozone concentration.
The optimized reactor ensures ozone generation efficiency of 339g/(kW·h) and ozone concentration of 82g/(N·m3).
You can find the details in his paper “Implementation of Double Surface Dielectric Barrier Discharge with Enamel Ozone Tube” in “Proceedings of KUTIC-2025”.