Enhancing impeller power efficiency and solid-liquid mass transfer in an agitated vessel with dual impellers through process intensification

Stoian, D, Eshtiaghi, N, Wu, J and Parthasarathy, R 2017, 'Enhancing impeller power efficiency and solid-liquid mass transfer in an agitated vessel with dual impellers through process intensification', Industrial and Engineering Chemistry Research, vol. 56, pp. 7021-7036.


Document type: Journal Article
Collection: Journal Articles

Title Enhancing impeller power efficiency and solid-liquid mass transfer in an agitated vessel with dual impellers through process intensification
Author(s) Stoian, D
Eshtiaghi, N
Wu, J
Parthasarathy, R
Year 2017
Journal name Industrial and Engineering Chemistry Research
Volume number 56
Start page 7021
End page 7036
Total pages 16
Publisher American Chemical Society
Abstract The effects of high volumetric solids concentration (CV), impeller type, and baffles on the impeller power input required for solids suspension and dispersion, and the solid-liquid mass transfer coefficient (kSL) were studied in this work using an agitated vessel with dual impellers for the purpose of process intensification. It was found that at CV = 0.2 (v/v), the impeller power consumption required for solids suspension per unit mass solids (εJS = PJS/MS) is minimized while at the same time achieving maximum kSL values. Overall, it was observed that process intensification could be achieved using two radial flow impellers in a taller vessel under unbaffled conditions. A case study highlighting the benefits of adopting some of this study's recommendations is presented. Mathematical correlations proposed to estimate εJS, impeller power consumption for solids dispersion and kSL as a function of CV were found to fit experimental data reasonably well.
Subject Heat and Mass Transfer Operations
Chemical Engineering Design
Turbulent Flows
Keyword(s) Process intensification
Zwietering correlation
solids suspension
solid-liquid mass transfer
dual impeller
baffling
DOI - identifier 10.1021/acs.iecr.7b00435
Copyright notice © 2017 American Chemical Society
ISSN 1520-5045
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