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Change in concentrations of antioxidants and paramagnetic centers during aging of petroleum transformer oils

Kamenchuk, Ya. A. / Pisareva, S. I.

Abstract Transformer oils (TOs) at different degrees of degradation were studied by means of a kinetic method using the model reaction of initiated cumene oxidation and by IR, ESR, and NMR spectroscopy. In the course of TO aging, the antioxidant additive ionol was consumed, and the concentration of new antioxidants, paramagnetic centers, and fused aromatic compounds increased. It was found that one of the main causes of the decrease in the dielectric properties of the oils (increase in the dielectric loss tangent) is the formation of free radicals inducing the formation of colloid structures.

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Change in concentrations of antioxidants and paramagnetic centers during aging of petroleum transformer oils

Kamenchuk, Ya. A. / Pisareva, S. I.

Abstract Transformer oils (TOs) at different degrees of degradation were studied by means of a kinetic method using the model reaction of initiated cumene oxidation and by IR, ESR, and NMR spectroscopy. In the course of TO aging, the antioxidant additive ionol was consumed, and the concentration of new antioxidants, paramagnetic centers, and fused aromatic compounds increased. It was found that one of the main causes of the decrease in the dielectric properties of the oils (increase in the dielectric loss tangent) is the formation of free radicals inducing the formation of colloid structures.

Change in concentrations of antioxidants and paramagnetic centers during aging of petroleum transformer oils

Kamenchuk, Ya. A. / Pisareva, S. I.

Abstract Transformer oils (TOs) at different degrees of degradation were studied by means of a kinetic method using the model reaction of initiated cumene oxidation and by IR, ESR, and NMR spectroscopy. In the course of TO aging, the antioxidant additive ionol was consumed, and the concentration of new antioxidants, paramagnetic centers, and fused aromatic compounds increased. It was found that one of the main causes of the decrease in the dielectric properties of the oils (increase in the dielectric loss tangent) is the formation of free radicals inducing the formation of colloid structures.

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Titel:

Change in concentrations of antioxidants and paramagnetic centers during aging of petroleum transformer oils

Beteiligte:

Kamenchuk, Ya. A. (Autor:in) / Pisareva, S. I. (Autor:in)

Erschienen in:

Petroleum Chemistry ; 46 ; 367-370

Erscheinungsdatum:

01.10.2006

Format / Umfang:

4 pages

ISSN:

1555-6239 , 0965-5441

DOI:

https://doi.org/10.1134/S0965544106050112

Medientyp:

Aufsatz (Zeitschrift)

Format:

Elektronische Ressource

Sprache:

Englisch

Schlagwörter:

Dielectric Loss , Petroleum Chemistry , Paramagnetic Center , Kinetic Method , Dielectric Loss Tangent Chemistry , Industrial Chemistry/Chemical Engineering

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