Effect of ZnO Catalyst on the Degradation of SF ₆ by DBD Plasma

This is the authors' abstract. We don't add key points for this paper.

Sulfur hexafluoride (SF6) is widely used in gas-insulated equipment due to its excellent electrical properties. However, SF6is a potent greenhouse gas, and with the implementation of the "dual carbon" strategy, reducing SF6emissions has become imperative. This paper analyzes the interaction between SF6and the ZnO surface through simulation calculations and studies the effects of ZnO-filled systems on SF6degradation by DBD through experiments. The results demonstrate that the charge transfer of individual fluorine atoms is relatively weak, with no significant charge transfer occurring before and after the adsorption of each fluorine atom. Furthermore, after adsorption on the ZnO surface, the SF6molecule does not undergo noticeable deformation, indicating that the adsorption of SF6on the ZnO surface is physical adsorption. Under the conditions of a 2% SF6concentration, a gas flow rate of 150 mL/min, and an input power of 90 W, the SF6degradation rate and equivalent capacitance with ZnO filling were found to be 96.6% and 79.31 pF, respectively. At an input power of 80W, the energy yield reached a maximum value of 12.41 g/kWh, and the main decomposition products of SF6were SO2, SO2F2, and SOF2. This study provides a theoretical basis for the efficient degradation and harmless treatment of SF6.