Comparative Study of Degradation of trans-1,3,3,3-Trifluoropropene, 2,3,3,3-Tetrafluoropropene, Perfluoro-3-methylbutanone-2, and Sulfur Hexafluoride in Dielectric-Barrier Discharge

Degradation of gaseous dielectrics after aging in barrier discharge has been experimentally studied and comparative analysis of their properties has been performed. The gases used as gaseous dielectrics have been trans-1,3,3,3-tetrafluoropropene (HFO-1234ze(E)), 2,3,3,3-tetrafluoropropene (HFO-1234yf), perfluoro-3-methylbutanone-2 CF3C(O)CF(CF3)(2), and sulfur hexafluoride SF6. The product composition of gas degradation before and after 5-h aging in the barrier discharge has been determined by gas chromatography-mass spectrometry and gas chromatography. According to the measurement data, 2,3,3,3-tetrafluoropropene is less prone to degradation and has the highest dielectric strength among the test carbon-containing gases.