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Electric Field Driven Separation of Oil–Water Mixtures: Model Development and Experimental Verification

Wallau, W, Arellano-Garcia, H and Schlawitschek, C (2016) Electric Field Driven Separation of Oil–Water Mixtures: Model Development and Experimental Verification Industrial and Engineering Chemistry Research, 55 (16). pp. 4585-4598.

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Electrocoalescence of aqueous droplets in oil emulsions is commonly contemplated for enhancing separation. High voltage electric fields can induce charges to drops evoking merging of adjacent droplets. The newly formed larger drops then sink faster in gravitational common settlers. Therefore, separation performance of an electrostatic coalescer is strictly linked to characteristics of the electric field and properties of the liquid–liquid system. In this work, the coalescence performance of water droplets sinking in dodecane at a pulsed DC electric field is investigated. An experimental setup allowing the simultaneous injection of similar sized drops, setting of voltage and pulsation frequency, and particle tracking at high frame rate and resolution is designed. The generated data are used to check the validity of modeling approaches for drag, dipole–dipole forces, and film-thinning. Furthermore, CFD simulations are carried out using a volume of fluid method tracking the interfaces between the two phases.

Item Type: Article
Subjects : Chemical Engineering
Divisions : Faculty of Engineering and Physical Sciences > Chemical and Process Engineering
Authors :
Wallau, W
Arellano-Garcia, H
Schlawitschek, C
Date : 27 April 2016
DOI : 10.1021/acs.iecr.5b03876
Copyright Disclaimer : Copyright © 2016 American Chemical Society
Depositing User : Symplectic Elements
Date Deposited : 23 Aug 2016 15:13
Last Modified : 31 Oct 2017 18:35

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