Electrostatic phase separation: a review
Mhatre, S.; Vivacqua, V.; Ghadiri, M.; Abdullah, A.M.; Al-Marri, M.J.; Hassanpour, A.; Hewakandamby, Buddhika N.; Azzopardi, Barry J.; Kermani, B.
Buddhika N. Hewakandamby
Barry J. Azzopardi
The current understanding and developments in the electrostatic phase separation are reviewed. The literature covers predominantly two immiscible and inter-dispersed liquids following the last review on the topic some 15 years. Electrocoalescence kinetics and governing parameters, such as the applied field, liquid properties, drop shape and flow, are considered. The unfavorable effects, such as chain formation and partial coalescence, are discussed in detail. Moreover, the prospects of microfluidics platforms, non-uniform fields, coalescence on the dielectric surfaces to enhance the electrocoalescence rate are also considered. In addition to the electrocoalescence in water-in-oil emulsions the research in oil-in-oil coalescence is also discussed. Finally the studies in electrocoalescer development and commercial devices are also surveyed.
The analysis of the literature reveals that the use of pulsed DC and AC electric fields is preferred over constant DC fields for efficient coalescence; but the selection of the optimum field frequency a priori is still not possible and requires further research. Some recent studies have helped to clarify important aspects of the process such as partial coalescence and drop–drop non-coalescence. On the other hand, some key phenomena such as thin film breakup and chain formation are still unclear. Some designs of inline electrocoalescers have recently been proposed; however with limited success: the inadequate knowledge of the underlying physics still prevents this technology from leaving the realm of empiricism and fully developing in one based on rigorous scientific methodology.
|Journal Article Type||Article|
|Publication Date||Apr 2, 2015|
|Journal||Chemical Engineering Research and Design|
|Peer Reviewed||Peer Reviewed|
|APA6 Citation||Mhatre, S., Vivacqua, V., Ghadiri, M., Abdullah, A., Al-Marri, M., Hassanpour, A., …Kermani, B. (2015). Electrostatic phase separation: a review. Chemical Engineering Research and Design, 96, https://doi.org/10.1016/j.cherd.2015.02.012|
|Keywords||Electrocoalescence; Phase separation; Emulsion break-up; Crude oil treatment|
|Copyright Statement||Copyright information regarding this work can be found at the following address: http://creativecommons.org/licenses/by/4.0|
Electrostatic phase separation- A review.pdf
Copyright information regarding this work can be found at the following address: http://creativecommons.org/licenses/by/4.0
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