Abstract
An experimental study was conducted in the sieve tray column to investigate the influence of gas flow rate on the hydrodynamic characteristics of the sieve tray, such as total tray pressure drop, wet tray pressure drop, dry tray pressure drop, clear liquid height, liquid holdup, and froth height. The hydrodynamic characteristics of the sieve tray were investigated for the gas/water system at different gas flow rates from 12 to 24 Nm3/h and at different pressures of 0.22, 0.24, and 0.26 MPa. In this study, a simulated waste gas was used that consisted of 30% CO2 and 70% air. The inlet volumetric flow rate of the water was 0.148 m3/h. The temperature of the inlet water was 19.5 °C. The results showed that the gas flow rate has a significant effect on the hydrodynamic characteristics of the tray. The authors investigated the effect of changing these hydrodynamic characteristics on the performance of a tray column used for CO2 capture.
Highlights
Absorption is a separation process used to capture many gases—such as CO2 —which, when released into the atmosphere, contributes to the increase of global warming
Knowledge of the hydrodynamic properties of trays is necessary for the design and operation of absorption columns because they control the liquid height on the trays and affect the pressure drop, tray efficiency, and flow conditions on the trays (Wijn, et al, 1999) [1]
Our study contributes to the body of literature on CO2 absorption
Summary
Absorption is a separation process used to capture many gases—such as CO2 —which, when released into the atmosphere, contributes to the increase of global warming. The absorption technology for CO2 capture mainly consists of the absorber column and the regeneration unit. The absorber column can be a plate column or packed column. The gas and liquid phases come into contact with each other on the trays or packing. The trays or packing material increase the gas–liquid interface, which increases mass and heat transfer between the contact phases. The CO2 component passes from the gas phase to a liquid phase and is absorbed. Knowledge of the hydrodynamic properties of trays is necessary for the design and operation of absorption columns because they control the liquid height on the trays and affect the pressure drop, tray efficiency, and flow conditions on the trays (Wijn, et al, 1999) [1]
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