Abstract
Mass transfer and terminal velocity of toluene drops rising in an extraction column was studied experimentally. The impact of packing was investigated by inserting a structured packing in three different heights of 10, 25 and 40 cm inside the column. The effect of packing height, flow rate and drop size on terminal velocity and Sherwood number were investigated and the results were also compared with the case of non-packed column. It was discussed that a 30% increase in Sherwood number could be achieved using the packing with 40 cm in height. It was also found that for Eotvos number, Eo, higher than 0.4, the deformation of drops and velocity oscillation appeared, which affected the terminal velocity. Finally, two correlations were proposed, which permitted the prediction of deformation and extraction ratio versus the dimensionless numbers of Reynolds, Eotvos and the packing height ratio.
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