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ChemEngineering 2018, 2(2), 19; https://doi.org/10.3390/chemengineering2020019

Measurement of Volumetric Mass Transfer Coefficient in Bubble Columns

Department of Multiphase Reactors, Institute of Chemical Process Fundamentals of the CAS, v.v.i., Rozvojová 2/135, 165 02 Prague, Czech Republic
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Received: 5 March 2018 / Revised: 14 April 2018 / Accepted: 23 April 2018 / Published: 1 May 2018
(This article belongs to the Special Issue Bubble Column Fluid Dynamics)
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Abstract

The paper presents a brief overview of experiments on volumetric mass transfer coefficient in bubble columns. The available experimental data published are often incomparable due to the different type of gas distributor and different operating conditions used by various authors. Moreover, the value of the coefficient obtained experimentally is very sensitive to the particular method and to the physical models used in its evaluation. It follows that the Dynamic Pressure Method (DPM) is able to provide physically correct values not only in lab-scale contactors but also in pilot-scale reactors. However, the method was not correctly proven in bubble columns. In present experiments, DPM was employed in a laboratory-scale bubble column with a coalescent phase and tested in the pure heterogeneous flow regime. The method was successfully validated by the measurements under two different conditions relevant to the mass transfer. First, the ideal pressure step was compared with the non-ideal pressure step. Second, the pure oxygen absorption was compared with the simultaneous oxygen-and-nitrogen absorption. The obtained results proved that DPM is suitable for measuring the mass transport in bubble columns and to provide reliable data of volumetric mass transfer coefficient. View Full-Text
Keywords: bubble column; mass transfer; dynamic pressure method bubble column; mass transfer; dynamic pressure method
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Zedníková, M.; Orvalho, S.; Fialová, M.; Ruzicka, M.C. Measurement of Volumetric Mass Transfer Coefficient in Bubble Columns. ChemEngineering 2018, 2, 19.

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