A High-Performance CuO/ZnO Catalyst for SF6 Catalytic Degradation with Ammonia Promotion
摘要
Developing sufficiently efficient catalytic systems and effective catalysts for SF6 catalytic degradation holds significant importance for achieving the dual carbon goal. Herein, a highly active CuO/ZnO catalyst has been constructed, facilitating the heterogeneous catalytic synthesis of SF6 into readily recoverable gaseous products. Studies indicate that the CuO/ZnO exhibits abundant oxygen vacancies, thereby demonstrating highly efficient SF6 catalytic degradation. Introducing NH3 into the background gas promotes the generation of Cu sites from CuO, facilitating the de-fluorination decomposition and S element reduction in the catalytic reaction. Solid product characterization revealed that fluorine from SF6 readily solidifies, preventing its release as a highly toxic fluorinated gas. Gas chromatography-mass spectrometer (GC-MS) analysis confirmed over 90% SF6 degradation and the catalytic products contained SO2 with high selectivity, which could be easily removed by alkaline washing. This work provides technical support for future large-scale, environmentally sound SF6 treatment.