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Measurement and modelling of droplet coalescence and breakage in a pulsed-plate extraction column

✍ Scribed by M. O. Garg; H. R. C. Pratt

Publisher: American Institute of Chemical Engineers
Year: 1984
Tongue: English
Weight: 954 KB
Volume: 30
Category: Article
ISSN: 0001-1541
DOI: 10.1002/aic.690300312

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✦ Synopsis

Droplet coalescence and breakage rates in a pulsed-plate extraction column have been measured using the colorimetric method of Hamilton and Pratt (1980). The results were interpreted in terms of rate constants, defined appropriately for the mixer-settler and emulsion regions of operation respectively, using a discrete population balance model. It is shown that the resultingvalues of these constants can be used to predict accurately the steady-state droplet-size distribution and apparent coalescence rate. Computations for a typical extraction system indicated that the effect of polydispersivity on performance is surprisingly small for the pulsed plate column.

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