Filtration of deformable emulsion droplets |
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Authors: | Headen T F Clarke S M Perdigon A Meeten G H Sherwood J D Aston M |
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Institution: | BP Institute and the Department of Chemistry, University of Cambridge, Madingley Road, Cambridge, UK. |
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Abstract: | Oil-in-water (o/w) emulsions of different droplet size were filtered on membranes of various pore sizes to investigate the growth and behaviour of o/w filter cakes. The cake desorptivity S and the filter membrane resistance R were measured at various filtration pressures P. The variation of S with P shows that filter cake oil droplets of radius a are effectively rigid for P < gamma/a and fully deformable for P > gamma/a, where gamma is the oil-water interfacial tension. For the largest P, when S became P-independent, the filter cake remained water-permeable as expected from theory. |
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