Liquid-liquid slug flow separation in a slit shaped micro device

W.A. Gaakeer, M.H.J.M. Croon, de, J. Schaaf, van der, J.C. Schouten

Research output: Contribution to journalArticleAcademicpeer-review

51 Citations (Scopus)
3 Downloads (Pure)


As micro reactors are more and more used in research and production, the need for micro work-up facilities like separators for organic and aqueous slug flow is growing. Numerous examples of these capillary force based separators are presented in literature. The disadvantage of these devices is that at higher flow rates, the hydraulic pressure exceeds the capillary pressure which results in breakthrough. In this paper we present a micro separator for liquid–liquid slug flow with hydrophobic and hydrophilic rectangular capillaries (height: 0.1–2 mm, length: 5 mm and width: 10 mm) to prevent this. The narrow height of the capillary provides a large capillary pressure and the large width a low hydraulic pressure. Separation efficiencies of 99.5% for flow rates of 30–50 ml min-1 are obtained. The ratio between the capillary pressure and the hydraulic pressure is a good predictor of the separation efficiency and must have the value 2 or higher to prevent breakthrough.
Original languageEnglish
Pages (from-to)440-444
Number of pages5
JournalChemical Engineering Journal
Publication statusPublished - 2012


Dive into the research topics of 'Liquid-liquid slug flow separation in a slit shaped micro device'. Together they form a unique fingerprint.

Cite this