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- W2557182281 abstract "The gas holdup and liquid phase axial dispersion coefficient are measured in two semi batch packed bubble columns, 10 and 15 cm diameter for an air–water system, at atmospheric conditions. The experiments were carried out using a transient method (the tracer response method). The dispersion coefficient was obtained by adjusting the experimental profiles of tracer concentration with the predictions of the model. Experiment results of packed bubble column, shows a considerable reduction of the back mixing. The investigations have been carried out using RTD measurements and the back mixing is usually characterized by the axial dispersion coefficient obtained from the one-dimensional axial dispersion model. Also, a decrease in superficial gas velocity reduces the liquid back mixing. It is observed that the liquid circulation comprises an upward flow in the column core and a downward flow along the wall. It also seen that the transition from the bubbly flow to the pulsation flow regime occurred at 5-6 cm/s superficial gas velocity." @default.
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- W2557182281 date "2011-09-30" @default.
- W2557182281 modified "2023-10-16" @default.
- W2557182281 title "Gas Holdup and Liquid-Phase Dispersion in Packed Bubble Columns" @default.
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- W2557182281 doi "https://doi.org/10.25130/tjes.18.3.02" @default.
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