Title :
Gaseous contaminants in SF6 interacting with alumina
Author :
Lussier, T. ; Fréchette, M.F. ; Larocque, R.Y.
Author_Institution :
IREQ, Varennes, Que., Canada
Abstract :
The interaction between CO2 or SOF2 (103 to 104 ppmv) and alumina (10 g) in SF6 was investigated. The adsorption kinetics was monitored by taking online gas samples. A gas chromatograph coupled to a thermal-conductivity detector served to assess the concentration of each species in the mixtures. Under the chosen experimental conditions, no matrix effect was detected, since the sorptive kinetics involving CO2/SF6 proved similar to that observed with CO 2/He. The adsorption of SOF2 was found to be stronger than that observed for CO2, although part was transformed into SO2. When the alumina sample was exposed to CO2 then to SOF2, some of the CO2 adsorbed was released, demonstrating a preferential adsorption on alumina
Keywords :
SF6 insulation; adsorption; alumina; electric breakdown; insulation testing; reaction kinetics; CO2; SF6; SF6 insulating gas; SO2; SOF2; adsorption kinetics; alumina; gas chromatograph; gaseous contaminants; insulation breakdown testing; preferential adsorption; sorptive kinetics; thermal-conductivity detector; Detectors; Dielectrics and electrical insulation; Electrical safety; Gas insulation; Kinetic theory; Sulfur hexafluoride; System testing; Temperature; Thermal conductivity; Valves;
Conference_Titel :
Electrical Insulation, 1996., Conference Record of the 1996 IEEE International Symposium on
Conference_Location :
Montreal, Que.
Print_ISBN :
0-7803-3531-7
DOI :
10.1109/ELINSL.1996.549473
