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

Abstract

Abstract 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.