The method was successfully validated by the measurements under two different conditions relevant to the mass transfer.
In present experiments, DPM was employed in a laboratory-scale bubble column with a coalescent phase and tested in the pure heterogeneous flow regime. However, the method was not correctly proven in bubble columns. 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. Moreover, the value of the coefficient obtained experimentally is very sensitive to the particular method and to the physical models used in its evaluation. The available experimental data published are often incomparable due to the different type of gas distributor and different operating conditions used by various authors. The paper presents a brief overview of experiments on volumetric mass transfer coefficient in bubble columns.
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