NaCl aqueous solution as a novel electrode in a dielectric barrier discharge reactor for highly efficient ozone generation

Ozone (O₃) generated by a dielectric barrier discharge (DBD) is widely used in various industrial processes. In this study, NaCl aqueous solution was used as a novel electric power transmission electrode in a DBD reactor (instead of a traditional metal electrode) for highly efficient ozone generation. The results demonstrated that a high O₃ yield of 242 g kWh^-1 with a concentration of 14.6 g m^-3 O₃ was achieved. The power transmission mechanism works because NaCl aqueous solution behaves as a capacitor when an alternating pulse voltage below 8 kHz is used. Compared with the resistance of the discharge barrier and discharge space, the resistance of NaCl aqueous solution can be ignored, which ensures that O₃ is generated efficiently. It is expected that O₃ generation using NaCl aqueous solution as a novel electrode in a DBD reactor could be an alternative technology with good application prospects.