Hydrodynamics of gas-liquid flow in micropacked beds: Pressure drop, liquid holdup, and two-phase model

作者：Zhang Jisong; Teixeira Andrew R; Kogl Lars Thilo; Yang Lu; Jensen Klavs F^*

来源：AIChE Journal, 2017, 63(10): 4694-4704.

DOI：10.1002/aic.15807

• hydrodynamics
• micropacked bed
• pressure drop
• liquid holdup
• multiphase flow model
• fixed beds

Hydrodynamics of gas-liquid two-phase flow in micropacked beds are studied with a new experimental setup. The pressure drop, residence time distribution, and liquid holdup are measured with gas and liquid flow rates varying from 4 to 14 sccm and 0.1 to 1 mL/min, respectively. Key parameters are identified to control the experimentally observed hydrodynamics, including transient start-up procedure, gas and liquid superficial velocities, particle and packed bed diameters, and physical properties of the liquids. Contrary to conventional large packed beds, our results demonstrate that in these microsystems, capillary forces have a large effect on pressure drop and liquid holdup, while gravity can be neglected. A mathematical model describes the hydrodynamics in the micropacked beds by considering the contribution of capillary forces, and its predictions are in good agreement with experimental data.

• 出版日期2017-10