<abstract xmlns="http://www.w3.org/1999/xhtml">

<p>The use of a liquid level sensor made it possible to measure changes in gas hold-up over time in a stirred tank during unsteady mixing. These results were subjected to Fourier time series analysis and a model of gas hold-up changes in time was proposed. It allowed one to determine the model value of gas hold-up, which can be useful for characterizing gas hold-up during unsteady mixing and as a comparison to gas hold-up during steady mixing. The characteristic frequency was also determined, which corresponds to about twice the oscillation frequency. Model gas hold-up values for coalescing and non-coalescing systems were compared. Moreover, the change of the gas hold-up at constant maximum stirrer rotation frequency and variable gas flow rate for different oscillation frequencies was investigated.</p>
</abstract>

The use of a liquid level sensor made it possible to measure changes in gas hold-up over time in a stirred tank during unsteady mixing. These results were subjected to Fourier time series analysis and a model of gas hold-up changes in time was proposed. It allowed one to determine the model value of gas hold-up, which can be useful for characterizing gas hold-up during unsteady mixing and as a comparison to gas hold-up during steady mixing. The characteristic frequency was also determined, which corresponds to about twice the oscillation frequency. Model gas hold-up values for coalescing and non-coalescing systems were compared. Moreover, the change of the gas hold-up at constant maximum stirrer rotation frequency and variable gas flow rate for different oscillation frequencies was investigated.

Gas hold-up analysis in an unsteady stirred vessel by means of infinite series

Department of Chemical Engineering and Equipment

Polish Journal of Chemical Technology

This work is licensed under the Creative Commons Attribution 4.0 International License.

{"article-title":"Gas hold-up analysis in an unsteady stirred vessel by means of infinite series"}

The use of a liquid level sensor made it possible to measure changes in gas hold-up over time in a stirred tank during unsteady mixing. These results were...

Gas hold-up analysis in an unsteady stirred vessel by means of infinite series

Published Online: Jun 30, 2023

Page range: 30 - 35

DOI: https://doi.org/10.2478/pjct-2023-0014

Keywords
unsteady mixing, gas hold-up, non-coalescing system, stirred vessel

© 2023 Sebastian S. Frankiewicz et al., published by Sciendo

This work is licensed under the Creative Commons Attribution 4.0 International License.

Gas hold-up analysis in an unsteady stirred vessel by means of infinite series

Published Online: Jun 30, 2023

Page range: 30 - 35

DOI: https://doi.org/10.2478/pjct-2023-0014

Keywordsunsteady mixing, gas hold-up, non-coalescing system, stirred vessel

© 2023 Sebastian S. Frankiewicz et al., published by Sciendo

This work is licensed under the Creative Commons Attribution 4.0 International License.

Keywords
unsteady mixing, gas hold-up, non-coalescing system, stirred vessel