Power consumption prediction in a coalescent liquid in mechanically agitated gas–liquid reactors

•Experimental data on impeller power for pilot-plant and laboratory fermenters are presented.•Several impeller types and their combinations are used in the experiments in coalescent batch.•The effect of impeller diameter is experimentally studied for several impeller types.•The correlation shapes ar...

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Bibliographic Details
Published in:Chemical engineering research & design 2019-07, Vol.147, p.644-647
Main Authors: Petříček, Radim, Moucha, Tomáš, Kracík, Tomáš, Haidl, Jan
Format: Article
Language:English
Subjects:
Coalescent media
Contactors
Correlation
Correlation analysis
Energy consumption
Energy dissipation
Energy measurement
Experiments
Fermenter
Frequencies
Impellers
Mass transfer
Multiple-impeller
Parameter estimation
Power consumption
Power input
Scale-up
Transport properties
Vessels
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Summary:•Experimental data on impeller power for pilot-plant and laboratory fermenters are presented.•Several impeller types and their combinations are used in the experiments in coalescent batch.•The effect of impeller diameter is experimentally studied for several impeller types.•The correlation shapes are suggested to estimate the impeller power in industrial design. In mechanically agitated gas–liquid contactors design, transport characteristics such as volumetric mass transfer coefficients, power input, and gas hold-up often become the key parameters. Therefore, their values should be estimated as precisely as possible. The power input is usually used as the scale of energy dissipation for other characteristics. The goal of this work is to establish reliable power input correlations for industrial processes design, where the coalescent batch is used. The experiments were carried out in a pilot-plant and laboratory vessel. Different types of impellers, as well as their different diameters, were used, and also the combinations of radially and axially pumping impellers on a common shaft. Energy consumption was measured in a multi-impeller vessel with different impeller frequencies and several gas flows. Correlation equations describing the behavior of individual impellers were evaluated. The correlations we suggested can be used for impeller power prediction in industrial scale vessels under a wide range of operational conditions.
ISSN:0263-8762
1744-3563
DOI:10.1016/j.cherd.2019.05.011