首页|外加O2和H2O对脉冲DBD降解SF6的影响

外加O2和H2O对脉冲DBD降解SF6的影响

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SF6因其优良的绝缘性能被广泛应用于各种高压电气设备中,但SF6是一种强温室效应气体,对SF6进行降解可极大地减少 SF6 对大气的危害.为此基于脉冲介质阻挡放电等离子体技术协同外加气体 O2 和 H2O 对 SF6进行降解处理.研究表明:O2 的加入对放电电流有促进作用,适量 O2 的加入可有效促进 SF6 的降解;随着外加O2含量的增加,SF6降解率和能量效率先上升后下降;2%的SF6在输入功率为45 W、气体体积流量为50 mL/min的条件下,O2体积分数为1%时反应体系获得最高降解率和能量效率,分别为58.40%、5.24 g/kWh.在SF6/Ar/O2/H2O体系,H2O的加入可提高SF6的降解率,当加入1%H2O时,SF6具有最优的降解效果,而随着H2O含量的继续增加,SF6 降解率逐渐降低;在 1%H2O 和 1%O2 加入时,SF6 具有最优降解率,此时 SF6 降解率和能量效率分别为89.7%和8.05 g/kWh.此外,O2的加入会抑制SO2的生成,而H2O的加入会促进SO2的产生,同时随着H2O含量的增加,SO2F2的产物选择性逐渐降低;在SF6/Ar/O2体系中,SO2F2与SOF4为降解产物中的主要组成部分,还存在SOF2、SO2、SiF4、SF4等分解产物.该研究根据红外光谱图和分解产物详细分析了O2参与下SF6的分解路径.
Effect of O2 and H2O on the Degradation of SF6 by Pulsed DBD
SF6 is widely used in various high voltage electrical equipment because of its excellent insulation performance.However,SF6 is a strong greenhouse effect gas.The degradation of SF6 can greatly reduce the harm of SF6 to the atmos-phere.In this study,SF6 was degraded by pulsed dielectric barrier discharge plasma with the addition of O2 and H2O.The results showed that the addition of O2 could promote the discharge current,and the degradation of SF6 could be effectively promoted by the addition of appropriate amount of O2.With the increase of O2 content,the degradation rate and energy efficiency of SF6 first increased and then decreased.The reaction system obtained the highest degradation rate and energy efficiency of 58.40%and 5.24 g/kWh,respectively,when the input power was 45 W,the gas flow rate was 50 mL/min,the content of O2 was 1%and the content of SF6 was 2%.In the SF6/Ar/O2/H2O system,the addition of H2O could im-prove the degradation rate of SF6.When 1%H2O was added,the degradation rate of SF6 had the best degradation effect,but the degradation rate gradually decreased with the increase of H2O content.The degradation rate and energy efficiency of SF6 were 89.7%and 8.05 g/kWh,respectively,when 1%H2O and 1%O2 were added.In addition,the addition of O2 in-hibited the formation of SO2,while the addition of H2O promoted the production of SO2.At the same time,the product selectivity of SO2F2 gradually decreased with the increase of H2O content.In the SF6/Ar/O2 system,SO2F2 and SOF4 are the main components of the degradation products,and there are also decomposition products such as SOF2,SO2,SiF4 and SF4.In this paper,the decomposition path of O2 in SF6 is analyzed in detail according to the infrared spectra and decom-position products.

dielectric barrier dischargeSF6degradation rate efficiencyplasmaO2

李亚龙、杨照迪、万昆、张英、王明伟、张晓星

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湖北工业大学太阳能高效利用及储能运行控制湖北省重点实验室,武汉 430068

贵州电网有限责任公司电力科学研究院,贵阳 550002

介质阻挡放电 SF6 降解率 等离子体 O2

2024

高电压技术
中国电力科学研究院 中国电机工程学会

高电压技术

CSTPCD北大核心
影响因子:2.32
ISSN:1003-6520
年,卷(期):2024.50(11)