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Azimuthally oscillating membrane emulsification for controlled droplet production
journal contributionposted on 2015-07-31, 12:43 authored by Pedro T. Santos Silva, Marijana DragosavacMarijana Dragosavac, Goran VladisavljevicGoran Vladisavljevic, Hemaka BandulasenaHemaka Bandulasena, Richard Holdich, Michael T. Stillwell
A novel membrane emulsification system is reported consisting of a tubular metal membrane, periodically azimuthally (tangentially) oscillated with frequencies up to 50 Hz and 7 mm displacement in a gently cross flowing continuous phase. A CFD analysis showed consistent axial shear at the membrane surface, which became negligible at distances from the membrane surface greater than 0.5 mm. For comparison, CFD analysis of a fully rotating membrane emulsification system showed local vortices in the continuous phase leading to a variable shear along the axis of the membrane. Using an azimuthally oscillating membrane, oil-in-water emulsions were experimentally produced with a median diameter of 20-120 µm, and a coefficient of variation of droplet size of 8%. The drop size was correlated with shear stress at the membrane surface using a force balance. In a single pass of continuous phase it was possible to achieve high dispersed phase concentrations of 40% v/v.
This work was supported by a Marie Curie Intra-European Fellowship within the 7th European Community Framework Programme.
- Aeronautical, Automotive, Chemical and Materials Engineering
- Chemical Engineering
Published inAIChE Journal
CitationSILVA, P.S. ... et al, 2015. Azimuthally oscillating membrane emulsification for controlled droplet production. AIChE Journal, 61(11), pp.3607-3615.
PublisherWiley / © American Institute of Chemical Engineers
- AM (Accepted Manuscript)
Publisher statementThis work is made available according to the conditions of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) licence. Full details of this licence are available at: https://creativecommons.org/licenses/by-nc-nd/4.0/
NotesThis is the peer reviewed version of the following article: SILVA, P.S. ... et al, 2015. Azimuthally oscillating membrane emulsification for controlled droplet production. AIChE Journal, 61(11), pp.3607-3615., which has been published in final form at http://dx.doi.org/10.1002/aic.14894. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving."