Abstract
Abstract Froth behaviour in downcomers has been studied experimentally. The foaming systems studied are n-butanol/water and n-pentanol/water. The non-foaming system used is air/water. Results obtained show that downcomer limitation is a function of downcomer size, type of system and liquid/gas loadings. To minimize downcomer limitations, the downcomer should be sized to minimize the height of froth/foam. A theoretical model of froth height in downcomers has been derived. Foam heights obtained from this model approximate closely the height of froth in the downcomer for both the foaming and non-foaming systems.
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