Title :
A study of the effect of copper and additives in hydrocarbon and ester based insulating liquids with isothermal microcalorimetry
Author :
Tronstad, Ingvild ; Blekkan, Edd ; Ese, Marit-Hlen
Author_Institution :
Dept. of Chem. Eng., Norwegian Univ. of Sci. & Technol. (NTNU), Trondheim, Norway
Abstract :
An isothermal microcalorimeter has been used to study the effect of solid copper in hexadecane, vegetable oil (ester) and mineral oil. The experiments have shown a catalytic effect of copper in oxidation of hydrocarbons and also the anti-oxidative effect of dibenzyl disulphide when combined with copper addition. The catalytic effect of copper is found in hydrocarbon as base oil and hexadecane, but not in experiments using inhibited oil and ester as the dielectric liquid.
Keywords :
ageing; calorimetry; catalysis; copper; insulating oils; oxidation; vegetable oils; antioxidative effect; catalytic effect; copper; dielectric liquid; ester based insulating liquids; hydrocarbon based insulating liquids; isothermal microcalorimetry; mineral oil; vegetable oil; Copper; Heating; Liquids; Nitrogen; Oil insulation; Oxidation; Powders; Aging; calorimetry; catalysis; copper; dielectric liquids; oxidation stability;
Journal_Title :
Dielectrics and Electrical Insulation, IEEE Transactions on
DOI :
10.1109/TDEI.2014.6832251
