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WUR – Coalescence and compression in centrifuged emulsions

Last updated 956 days ago by Albert Verver


NL GUTS Group of Users of Technology for Separation in the Netherlands


20130416 Wageningen University (WUR) – Mr. Thomas Krebs (currently FMC) - Coalescence and compression in centrifuged emulsions studied with in situ optical microscopy

WUR, TU Delft, UTwente, FMC, Frames, Shell and Wintershall joined forces in an ISPT project to develop an in-line swirl technology making use of flow velocity only to generate centrifugal forces to separate water and oil in water streams from oil and gas recovery. WUR developed an optical method to study the oil droplet formation and coalescence under these centrifugal forces in monolayers, overcoming the turbidity hindrance. Emulsion compression, drop formation and coalescence are well visible and relations between drop formation and osmotic pressure were established; drop forms and compression; emulsion density and degree of compression, including the impact of g-force level. Drop – drop coalescence is much slower than drop – oil phase coalescence.

The method is also applicable to study foam stability. Application extends to mechanical separators and mechanical settlers. www.wur.nl


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