Sustainable Reclamation of Spent Transformer Oil Using Bentonite and Palm Kernel Shell: A Review

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This review explores the effectiveness of bentonite and palm kernel shell in reclaiming degraded transformer oil, highlighting sustainable practices.

The reclamation of spent transformer oil effectively improves key properties like dielectric strength and viscosity, enhancing oil quality.
Various adsorbents including bentonite and palm kernel shell show high efficacy due to their natural abundance and adsorption capacities.
Integrated reclamation protocols enable the restoration of spent transformer oil to a condition nearly comparable to its original state.
The use of eco-friendly materials promotes sustainable practices while significantly reducing waste and operational costs.

Okafoagu et al. (2025) studied this question.

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This review explores the effectiveness of bentonite and palm kernel shell in reclaiming degraded transformer oil, highlighting sustainable practices.