新型环保气体双三氟甲基硫醚的热稳定性研究  

Study on Thermal Stability of New Environmentally Friendly Gas Bistrifluoromethyl Sulfide

作　　者：唐念 庞衍泽 孙东伟 王中奥 张博雅 李兴文[2] TANG Nian;PANG Yanze;SUN Dongwei;WANG Zhong ao;ZHANG Boya;LI Xingwen(Electric Power Research Institute of Guangdong Power Grid Co.,Ltd.,Guangzhou,Guangdong 510080,China;State Key Lab of Electrical Insulation&Power Equipment,Xi an Jiaotong University,Xi an,Shaanxi 710049,China)

机构地区：[1]广东电网有限责任公司电力科学研究院,广东广州510080 [2]电工材料电气绝缘全国重点实验室(西安交通大学),陕西西安710049

出　　处：《广东电力》2024年第9期29-35,共7页Guangdong Electric Power

基　　金：国家重点研发计划项目(2022YFE0129500);中国南方电网有限责任公司科技项目(GDKJXM20220361)。

摘　　要：为了降低SF_(6)高温室效应对环境的影响,寻找环境友好、性能优异的SF_(6)替代气体很有必要,双三氟甲基硫醚(CF_(3)SCF_(3))因其综合性能良好有望成为新一代SF_(6)替代气体。为了探究CF_(3)SCF_(3)的热稳定性,将CF_(3)SCF_(3)样品充入石英管中,使用管式炉加热该气体。在特定温度保持一定时间后,采集气体样品并送入气相色谱质谱联用仪中,提取样品色谱与色谱峰对应的质谱,并在NIST 2017数据库中搜索所获质谱以确定气体成分。研究发现:该气体在450℃时开始生成极少量CF 3 SSCF 3;在500℃时开始出现较为明显的分解;温度继续升高至550℃后,有更多气体分解,并出现了CF 3 CF 3、CS 2、CF 3 SCF 2 CF 3等更多分解产物。由此可知CF_(3)SCF_(3)热稳定性与C_(4)F_(7)N基本相当。研究成果为SF_(6)的环保替代提供了新选择。In order to reduce SF_(6)greenhouse effect on the environment,it is important to find eco-friendly SF_(6)alternative gas with excellent insulation performance.It is found that bitrifluoromethyl sulfide(CF_(3)SCF_(3))gas has good comprehensive properties expected to become a new generation of SF_(6)alternative gas.To explore the thermal stability of CF_(3)SCF_(3),the sample was filled into quartz tube,and the tube furnace was used to heat the gas.After heating to a specific temperature and holding it for a certain amount of time,the gas was sampled and fed into a GC-MS instrument,of which the chromatography and mass spectrum of each chromatography peak was extracted.Mass spectrum was searched in the NIST 2017 database to determine the gas composition.It is found that the gas begins to produce a very small amount of CF 3 SSCF 3 at 450℃.At 500℃,the decomposition begins to appear more obvious.When the temperature continues to rise to 550℃,more gases decompose,and more decomposition products such as CF 3 CF 3,CS 2,CF 3 SCF 2 CF 3 appear.It can be seen that the thermal stability of the gas is similar to that of C_(4)F_(7)N.The research results provide a new choice of environmental protection substitution of SF_(6).

关 键 词：SF_(6)替代气体 高通量虚拟筛选 CF_(3)SCF_(3)分子 热稳定性 局部过热 

分 类 号：TM213[一般工业技术—材料科学与工程]