Abstract
Local and mean gas holdup and liquid circulation rates were measured in an airlift loop contactor with pseudoplastic liquids. The experiments were carried out with aqueous solutions of sodium carboxymethylcellulose at various concentrations as pseudoplastic liquids. The liquid circulation velocity was varied by placing orifice plates on the inlet of the downcomer. It was found that the gas holdup and liquid circulation velocity depend on the gas superficial velocity, resistance in the column and rheological properties of the liquid. Correlations for prediction of both the mean gas holdup and liquid circulation velocity are presented. Satisfactory agreement between measured and calculated values was obtained.
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