This paper summarizes some theoretical aspects and recent developments on electrocoalescence; experimental data are also provided to demonstrate strengths and limitations of this technology. Tests carried out in a laboratory flow loop equipped with an electrocoalescer package show that separation performances are poor when the emulsions' Reynolds number in the electric field zone is low and when the water droplet size distribution in the emulsion is centered at small diameters. As a consequence, the engineering studies for integrating an electrocoalescer package inside an existing separation facility should promote moderately turbulent emulsion flow condition to ensure that the technology will work efficiently.
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