Solid-liquid mass transfer in sonicated agitated vessels with high concentration slurries

Stoian, D, Eshtiaghi, N, Wu, J and Parthasarathy, R 2019, 'Solid-liquid mass transfer in sonicated agitated vessels with high concentration slurries', Heat and Mass Transfer/Waerme- und Stoffuebertragung, vol. 55, no. 5, pp. 1327-1335.


Document type: Journal Article
Collection: Journal Articles

Title Solid-liquid mass transfer in sonicated agitated vessels with high concentration slurries
Author(s) Stoian, D
Eshtiaghi, N
Wu, J
Parthasarathy, R
Year 2019
Journal name Heat and Mass Transfer/Waerme- und Stoffuebertragung
Volume number 55
Issue number 5
Start page 1327
End page 1335
Total pages 9
Publisher Springer
Abstract Process intensification of agitated slurry vessels requires improving solid-liquid mass transfer beyond that can be achieved with agitation alone. As ultrasound has been shown to enhance solid-liquid mass transfer, this study aims to investigate whether process intensification can be achieved under combined (agitation + ultrasonic irradiation) condition. Experiments were conducted involving high volumetric solids concentration (C V ) suspended at just off-bottom solids suspension (N JS ) condition in a 0.2 m diameter tank equipped with a turbine and an ultrasonic generator. The mass transfer experiments were conducted using ion-exchange (NaOH-cation resin) and desorption (phenol-polymeric resin) systems. Ultrasound was found to have no influence on mass transfer in the ion-exchange system for a C V range of 0.030.20 (volume solids/volume slurry). However, the rate and degree of mass transfer in the desorption system were higher under the (agitation + ultrasonic irradiation) condition compared to those under agitation-only condition. Under ultrasound irradiation, the degree of mass transfer in the desorption experiments increased with increasing time but did not show a clear trend with increasing C V . These results imply that the level of enhancement in solid-liquid mass transfer in agitated vessels due to ultrasound is dependent on the physical properties of the solid and liquid phases as well as C V .
Subject Chemical Engineering Design
DOI - identifier 10.1007/s00231-018-2517-x
Copyright notice © 2018, Springer-Verlag GmbH Germany, part of Springer Nature.
ISSN 0947-7411
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