Cui Zhaolun, Li Yi, Xiao Song, Tian Shuanngshuang, Tang Ju, Hao Yanpeng, Zhang Xiaoxing
School of Electric Power Engineering, South China University of Technology, Guangzhou, People's Republic of China.
School of Electrical Engineering and Automation, Wuhan University, Wuhan, People's Republic of China.
Sci Total Environ. 2024 Jan 1;906:167347. doi: 10.1016/j.scitotenv.2023.167347. Epub 2023 Sep 28.
The increasing utilization and emission of sulfur hexafluoride (SF) pose severe threats to the climate and the environment, owing to its potent greenhouse gas properties. In this paper, we comprehensively review the recent progresses of SF emission reduction approaches. Currently, the use and emission of SF are still on the rise, and mainly concentrated in the power industry. Restrictive use and emission reduction policies are fundamental step in guiding SF emission, but they are poor promoted in developing economies. More specific policies and regulations are needed in conjunction with timely and accurate assessments of SF atmospheric properties and emissions. SF recovery is the direct emission reduction approach, but defects in recovery methods and equipment limit its applications. The development of SF purification technologies and optimizations in recovery devices and processes are needed for its treatment of different regions and SF volumes. SF degradation is the final step of waste gas treatment, and its development needs to better balance the degradation rate and product selectivity, as well as to improve their multi-scenario responsiveness. SF substitution is a necessity for future large-scale SF emission reduction. Improvements in SF-free applications and its long-term stability are critical via new gas design, gas mixture optimization and equipment updates. Finally, all the emission reduction approaches are closely related, and promoting their synergistic development and complementarity is the ultimate way to realize SF lifecycle management.
六氟化硫（SF₆）的使用量和排放量不断增加，因其强大的温室气体特性，对气候和环境构成了严重威胁。在本文中，我们全面回顾了六氟化硫减排方法的最新进展。目前，六氟化硫的使用和排放仍在上升，且主要集中在电力行业。限制使用和减排政策是引导六氟化硫排放的基本措施，但在发展中经济体中推行不力。需要更具体的政策法规，同时对六氟化硫的大气特性和排放进行及时准确的评估。六氟化硫回收是直接的减排方法，但回收方法和设备的缺陷限制了其应用。需要针对不同地区和六氟化硫量开发六氟化硫净化技术，并优化回收装置和工艺。六氟化硫降解是废气处理的最后一步，其发展需要更好地平衡降解速率和产物选择性，以及提高其多场景响应能力。六氟化硫替代是未来大规模减排的必要手段。通过新气体设计、气体混合物优化和设备更新，改善无六氟化硫应用及其长期稳定性至关重要。最后，所有减排方法都密切相关，促进它们的协同发展和互补是实现六氟化硫生命周期管理的最终途径。
