Simultaneous measurement of interfacial area and mass transfer coefficient in three‐phase fluidized beds

The technique of simultaneous measurement of the mass transfer coefficient and the interfacial area (Robinson and Wilke, 1974) was used to measure the volumetric liquid‐phase mass transfer coefficient {article}{empty}{document}(kL a ){document} , the interfacial area {article}{empty}{document}( a ){document} and the true liquid‐phase mass transfer coefficient ( k L ) in three‐phase fluidized beds. The eddy‐cell model of Lamont and Scott (1970) was found to give a reasonable fit to the k L data, if the proportionality constant is modified. The {article}{empty}{document}kL a{document} and {article}{empty}{document}a{document} data were correlated by empirical equations. Some information on bubble diameter was deduced from the interfacial area and holdup measurements.