Abstract
Microwave technology is introduced for removal of naphthenic acid from diesel oil. The decrease of Zeta-potential of interface and the viscosity of diesel oil are responsible for the acceleration of separation of naphthenic acid with microwave irradiation. It was observed that the separation percentage changed with the dosage of alkali compound solvent, irradiation pressure, irradiation time, irradiation power, settling time, and oil phase-to-solvent phase volume ratio (O/S). The removal rate of naphthenic acid was maximum when the optimum conditions were suggested to be M p /M T = 1.5, 0.05 MPa, 6 min, 375 W, 25 min, and O/S = 10, respectively.
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