Study on thermal decomposition characteristics of environmentally friendly insulating medium C5F10O and C5F10O/air mixture

Abstract

In recent years, C5F10O is considered to be one of the most potential candidate gas for SF6 in gas insulation equipment because of its excellent electrical performance and environmental protection advantages. However, there are few studies on the decomposition of C5F10O and its mixture with air. In this paper, the decomposition characteristics of C5F10O and C5F10O-air mixtures were studied on the established thermal decomposition simulation experimental platform. Gas chromatography-mass spectrometry was used to detect the decomposition products. With the increase of temperature, the decomposition of C5F10O increases. The main decomposition products are CF4, CO2, C2F6, CF2O, C3F8, C4F10, C4F10O, C4F8O, etc. With the increase of temperature, the type and content of decomposition products increase. The results show that the mixture of C5F10O and C5F10O-air has good thermal stability at 300 °C. Decomposition of C5F10O increases with the increase of temperature, and the types of decomposition products increase. O2 in C5F10O-air mixture is involved in the decomposition reaction, and CO2 is the main product and causes the chamber pressure to rise. At the same time, the research results can provide reference for the application of air as a buffer gas of C5F10O.