摘要
SF_(6)的强温室效应对全球气候的潜在影响已经引起了人们的高度担忧,对SF_(6)进行降解是处理SF_(6)的一种有效手段。文中基于填充床式反应器(PBR),针对系统中H_(2)O浓度对降解SF_(6)的影响进行了研究,并从降解效率与产物两个角度进行了分析。研究结果表明H_(2)O能够在PBR中产生大量的OH与H自由基,这些活性自由基能够与SF_(6)的初级分解产物进行次级反应从而促进其分解,提高了其降解率。实验发现,当SF_(6)体积分数为2%时,最有利于促进SF_(6)降解的水汽浓度为1%,其降解率达到95.69%。同时,H_(2)O的分解需要吸收环境中的自由电子,从而对PBR中的细丝放电存在抑制作用。H_(2)O浓度也对SF_(6)降解产物的体积分数与选择性存在较大影响,H_(2)O浓度的增加会使得最终生成物SO_(2)的体积分数增加,SOF_(4)体积分数降低;文中的研究增加了人们对于SF_(6)降解机理的理解,也为之后的工业应用作了铺垫。
The potential impact of strong greenhouse effect of SF_(6)on global climate has already caused arousedgreat concern.Degradation of SF_(6)is an effective measure to treat SF_(6).In this paper,the effect of H_(2)O volume frac-tion on the degradation of SF_(6)based on packed bed reactor(PBR)is studied and analyzed from such two aspects asdegradation efficiency and products.It is shown by the study result that H_(2)O can produce a large amount of OH andH free radicals in the PBR.These active free radicals can react with the primary decomposition products of SF_(6)topromote their decomposition and improve their degradation rate.It is found by experiment that when the volumefraction of SF_(6)is 2%,the water vapor volume friction which is most beneficial to promote the degradation of SF_(6)is 1%and its degradation rate reaches 95.69%.Meanwhile,the decomposition of H_(2)O needs absorbing free electronsin the environment,thereby inhibiting the filament discharge in the PBR.The volume friction of H_(2)O also has agreat influence on the volume friction and selectivity of SF_(6)degradation products.The increase of H_(2)O volume frac-tion will increase the volume fraction of SO_(2)and decrease that of SOF_(4).The study in this paper improves the under-standing to SF_(6)degradation process and also paves the way for industrial applications.
作者
董晓虎
程绳
姚京松
王浩
陈思哲
熊兰
张国治
周畅
张晓星
DONG Xiaohu;CHENG Sheng;YAO Jingsong;WANG Hao;CHEN Sizhe;XIONG Lan;ZHANG Guozhi;ZHOU Chang;ZHANG Xiaoxing(State Grid Hubei Electric Power Co.,Ltd.,Maintenance Company,Wuhan 430050,China;Hubei University of Technology,Hubei Engineering Research Center for Safety Monitoring of New Energy and Power Grid Equipment,Wuhan 430068,China)
出处
《高压电器》
CAS
CSCD
北大核心
2021年第3期172-179,共8页
High Voltage Apparatus
基金
中国湖北省自然科学基金资助项目(2020CFB166)
国网湖北省电力有限公司检修公司基金(SGHBJX00YJJS2000863)。
关键词
SF_(6)降解
PBR
H_(2)O浓度
降解效率
选择性
SF_(6)degradation
packed-bed reactor
water vapor concentration
degradation efficiency
selectivity
