Simulation of hydrodynamics in RDC extraction columns using the simulation tool “ReDrop” |
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Authors: | Murat KalemFlorian Buchbender Andreas Pfennig |
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Affiliation: | AVT - Thermal Process Engineering, RWTH Aachen University, Wüllnerstr. 5, Aachen 52062, Germany |
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Abstract: | ReDrop is a simulation tool which can predict the behaviour of pulsed extraction columns on pilot-plant scale. Because it follows a certain number of drops during their entire lifetime in an extraction column, it can be seen as a Monte-Carlo solution of drop-population balances. ReDrop is based on single-drop models which have system-specific parameters. These parameters are determined from lab-scale experiments with single drops. In this study, ReDrop is extended to RDC extraction columns and simulations are carried out for the standard test systems toluene (d) + water (c) + acetone (c → d) and n-butyl acetate (d) + water (c). The calculated hold-up and Sauter mean diameter show good agreement with the experimental data obtained in pilot-plant scale experiments. |
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Keywords: | Extraction Simulation Separations Population balances RDC column |
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