Decomposition Properties of Trifluoroiodomethane under Discharges and Interruptions
This paper is devoted to detecting decomposition characteristics of Iodotrifluoromethane ( $CF_3I$ ) under alternating current (AC) discharges or load current interruptions. The decomposition products are measured utilizing chromatography-mass spectroscopy. It is found that less than 1% $CF_3I$ gas decomposed after several interruptions at load current of 200 A or hundred times of AC discharges. However, under interruptions at a current of 400 A, more than 95% $CF_3I$ gas decomposed into carbon tetrafluoride ( $CF_4$ ) and hexafluoroethane ( $C_2F_6$ ). The equilibrium compositions based on Gibbs free energy minimization of $CF_3I$ was calculated to explain the decomposition mechanism.
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