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Study of gas-liquid mass transfer in bubble and spray column adding solid media

Abstract : This thesis projected to investigate both hydrodynamics and mass transfer in both spray and bubble columns and comparing their specific power consumptions in order to develop the selection guideline for industrial usages. The results indicated that the bubble column had larger specific interfacial area than the spray column when using a small gas loading rate. At this range of operation, the bubble column yielded a higher overall mass transfer coefficient with the same specific power consumption. However, when operating at high gas loading rate, the spray column was the one better than the bubble column since the bubble column consumed larger power consumption as the pressure drop of the bubble column was mostly due to the gas flow. In addition, this research also studied the effect of the solid phase on the hydrodynamics and mass transfer in the bubble column and spray column. By using the colorimetric method of “red bottle” experiment, it was found that the bubble-particles collision diminished the mass transfer of bubbles because the collision slowed down the bubbles especially for the small bubbles due to the fact that the small bubble simply lost their velocities from the collision. However, there was an advantage of introducing the particles since solid particles could obstruct the rising bubble and reduced its rising velocity. Consequently, the contact time between gas and liquid is increased and resulted in a higher gas hold up, specific interfacial area and thus mass transfer.
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Submitted on : Thursday, August 20, 2020 - 10:34:14 AM
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  • HAL Id : tel-02918120, version 1

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Kritchart Wongwailikhit. Study of gas-liquid mass transfer in bubble and spray column adding solid media. Mechanics of the fluids [physics.class-ph]. INSA de Toulouse; Faculty of Engineering, Chulalongkorn University, 2019. English. ⟨NNT : 2019ISAT0008⟩. ⟨tel-02918120⟩

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