Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 419323
Title Separation kinetics of an oil-in-water emulsion under enhanced gravity
Author(s) Krebs, T.; Schroën, C.G.P.H.; Boom, R.M.
Source Chemical Engineering Science 71 (2012)3. - ISSN 0009-2509 - p. 118 - 125.
DOI https://doi.org/10.1016/j.ces.2011.10.057
Department(s) Food Process Engineering
VLAG
Publication type Refereed Article in a scientific journal
Publication year 2012
Keyword(s) coalescence - drop - bubble - stability - surface - plane - size
Abstract The breakup of crude oil emulsions to produce clean oil and water phases is an important task in crude oil processing. We have investigated the demulsification kinetics of a model oil-in-water emulsion in a centrifugal field to mimic the forces acting on emulsion droplets in oil/water separators such as hydrocyclones. The rate of growth of separated oil phase and the change in mean droplet diameter of the emulsion layer was measured as a function of surfactant concentration, centrifugal acceleration and time. Demulsification is enhanced with increasing centrifugal acceleration and time and decreasing surfactant concentration. A kinetic analysis was performed that allows to estimate the characteristic coalescence times between droplets in the emulsion and between a droplet and the separated oil interface. The experimental procedure presented in this work can serve as a simple, but useful test to predict the separation efficiency of emulsions in separators with swirling flow fields.
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