Sulfur hexafluoride (SF6) gas has been used in large-scale electrical equipment, because of its excellent high-voltage dielectric strength. However, SF6 has been identified as a greenhouse gas, because of its high global warming potential (GWP) and extended lifetime in the atmosphere. Based on theoretical calculations, trifluoromethanesulfonyl fluoride (CF3SO2F) is a relatively eco-friendly gas with a lower GWP than that of SF6, and the electrical performance of CF3SO2F is also superior to that of SF6. A new procedure to synthesize CF3SO2F gas is presented for application in high-voltage insulation. An AC breakdown voltage test involved mixing CF3SO2F with CO2 and N2 to obtain insulation data. The stability of CF3SO2F was shown by self-recoverability tests and decomposition product analysis after breakdown, and the results show no harmful or flammable and explosive byproduct that would have a negative climate impact. These results demonstrate that CF3SO2F gas has great potential as a new insulating gas with great dielectric strength.

An efficient two-step synthetic method of a brand-new environment-friendly insulating gas thiazyl trifluoride was introduced.

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