Zhang Ying, Wang Mingwei, Tan Huiyu, Li Yalong, Yu Lei, Yang Zhaodi, Wan Kun
Scientific Research Institute of Electric Power, Guizhou Power Grid Company Ltd., Guiyang 550000, China.
Hubei Engineering Research Center for Safety Monitoring of New Energy and Power Grid Equipment, Hubei University of Technology, Wuhan 430068, China.
ACS Omega. 2024 Oct 30;9(45):45232-45239. doi: 10.1021/acsomega.4c06677. eCollection 2024 Nov 12.
SF is a greenhouse gas widely used in the power industry that cannot be directly emitted. This study employs a self-designed two-stage dielectric barrier discharge (DBD) plasma series method that was used to degrade SF gas and analyzes the effect of HO concentration. The results indicate that the SF degradation rate (DR) initially increased and then decreased with the rise in the water vapor content. When the added HO concentration increased from 0.5 to 1.5%, the degradation rate of SF increased from 89.49 to 100%, achieving complete degradation of SF. However, when the HO concentration further increases to 2.5%, the degradation rate of SF decreased to 92.83%. The energy efficiency of SF degradation in the primary reaction system first increased and then decreased with the increase of HO concentration, while that of SF in the secondary reaction system first decreased and then increased. It was found that the products of SF were SOF, SO, SOF, and SOF. The addition of HO increased the selectivity of SO in the decomposition products to 75.17%, and inhibit the formation of SOF and SOF. This study provides experimental support for the degradation of SF waste gas and provides a research direction for its industrial application.
六氟化硫（SF）是电力行业广泛使用的一种温室气体，不能直接排放。本研究采用自行设计的两级介质阻挡放电（DBD）等离子体串联法对SF气体进行降解，并分析了羟基（HO）浓度的影响。结果表明，随着水蒸气含量的增加，SF的降解率（DR）先升高后降低。当添加的HO浓度从0.5%增加到1.5%时，SF的降解率从89.49%提高到100%，实现了SF的完全降解。然而，当HO浓度进一步增加到2.5%时，SF的降解率降至92.83%。一次反应系统中SF降解的能量效率随HO浓度的增加先升高后降低，而二次反应系统中SF的能量效率则先降低后升高。研究发现，SF的产物为SOF、SO、SOF和SOF。HO的添加使分解产物中SO的选择性提高到75.17%，并抑制了SOF和SOF的形成。本研究为SF废气的降解提供了实验支持，并为其工业应用提供了研究方向。
