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Catalytic Hydroisomerization Upgrading of Vegetable Oil-Based Insulating Oil

Department of Chemical Engineering, Kyung Hee University, Gyeonggi-do 17104, Korea
Author to whom correspondence should be addressed.
Catalysts 2018, 8(4), 131;
Received: 9 February 2018 / Revised: 18 March 2018 / Accepted: 28 March 2018 / Published: 28 March 2018
(This article belongs to the Special Issue Catalytic Processes for The Valorisation of Biomass Derived Molecules)
PDF [7435 KB, uploaded 3 May 2018]


Due to its high biodegradability, high dielectric strength, and good thermal stability, vegetable oil is under consideration as an alternative transformer fluid for power system equipment, replacing traditional petroleum-based insulating oils. Its main drawbacks are its poor low-temperature properties arising from the crystallization of its long-chain normal paraffins, and its lower oxidative stability arising from its higher concentration of unsaturated fatty acids. Hydroisomerization/isomerization over bifunctional catalysts is considered to be an efficient pathway to upgrade vegetable oil-based insulating oil; this converts saturated/unsaturated long-chain fatty acids to branched isomers. The efficiency of this process depends crucially on the behavior of the catalyst system. This paper extensively reviews recent results on the influence that the metal phase and acidity, the effects of pore channels, and the balance between metal and acid sites have upon the activity and selectivity of catalytic hydroisomerization. View Full-Text
Keywords: insulating oils; hydroisomerization; bio-insulating oil; zeolite insulating oils; hydroisomerization; bio-insulating oil; zeolite

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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Phan, D.-P.; Lee, E.Y. Catalytic Hydroisomerization Upgrading of Vegetable Oil-Based Insulating Oil. Catalysts 2018, 8, 131.

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