Study on Thermal Stability of New Environmentally Friendly Gas Bistrifluoromethyl Sulfide
In order to reduce SF6 greenhouse effect on the environment,it is important to find eco-friendly SF6 alternative gas with excellent insulation performance.It is found that bitrifluoromethyl sulfide(CF3SCF3)gas has good comprehensive properties expected to become a new generation of SF6 alternative gas.To explore the thermal stability of CF3SCF3,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 CF3SSCF3 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 CF3CF3,CS2,CF3SCF2CF3 appear.It can be seen that the thermal stability of the gas is similar to that of C4F7N.The research results provide a new choice of environmental protection substitution of SF6.
SF6 alternative gashigh-throughput virtual screeningCF3SCF3thermal stabilitylocal overheating
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维普
