The study relates to the mass transfer and the bubble size in a non standard vessel equipped with various dual‐impeller combinations. The effects of the rotational speed, gas flow rate, impeller type and diameter are investigated. The volumetric mass transfer coefficient k L a and the bubble size d bs were studied. The liquid side mass transfer coefficient k L and the volumetric interfacial area a were estimated separately. A comparison has been made with some existing correlations.
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Bouaifi et al. (1998) studied this question.
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