Predicting Mass Transfer in Liquid–Liquid Extraction Columns

In this work, the GEneralised Multifluid Modelling Approach (GEMMA) is applied to the simulation of liquid–liquid extraction in a Rotating Disc Column (RDC) and a Pulsed Sieve-plate Extraction Column (PSEC). A mass transfer modelling methodology is developed, in which the multiphase flows, droplet s...

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Bibliographic Details
Published in:Processes 2022-05, Vol.10 (5), p.968
Main Authors: Fells, Alex, De Santis, Andrea, Colombo, Marco, Theobald, Daniel W., Fairweather, Michael, Muller, Frans, Hanson, Bruce
Format: Article
Language:English
Subjects:
Computational fluid dynamics
Computer applications
Droplets
Extraction (Chemistry)
Fluid dynamics
Interfaces
Liquid-liquid extraction
Mass transfer
Methods
Morphology
Multiphase flow
Nuclear power plants
Rotating disks
Rotating liquids
Sieve plates
Simulation
Size distribution
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Summary:In this work, the GEneralised Multifluid Modelling Approach (GEMMA) is applied to the simulation of liquid–liquid extraction in a Rotating Disc Column (RDC) and a Pulsed Sieve-plate Extraction Column (PSEC). A mass transfer modelling methodology is developed, in which the multiphase flows, droplet size distribution and dispersed phase holdup predicted with computational fluid dynamics are coupled to mass transfer correlations to predict the overall mass transfer. The numerical results for the stage-averaged dispersed phase holdup, Sauter mean droplet diameter and axial solute concentration in the RDC and PSEC agree with experimental observations. The proposed modelling method provides an accurate predictive tool for complex multiphase flows, such as those observed in intensified liquid–liquid extraction, and provides an alternative approach to column design using empirical correlations or pilot plant study.
ISSN:2227-9717
2227-9717
DOI:10.3390/pr10050968