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Packed bed absorption column: Hydrodynamics and mass transfer

This paper presents the results of the determination of the hydrodynamic
 characteristics and mass transfer in the pilot plate absorption column. The
 experimental values of the pressure drop in the countercurrent flow of air
 and water through the column were obtained. The graphic dependence of the
 pressure drop of air per unit height of the layer of packing (?P/h) on the
 apparent air velocity (Ug) through the dry charge was shown to be in the
 form of a quadratic function. From the graphical function which shows the
 dependence of the pressure drop per unit height of the layer of filling
 (?P/m) on the apparent air velocity during the countercurrent flow of the
 phases (water and air), three fields of the interaction of the phases were
 observed: a) the area of low load, at low apparent air velocities, b) the
 area of high load, at higher air velocities, and c) the flooding area, when
 the liquid completely fills the cavities and the working gas in them starts
 bubbling. The overall mass transfer coefficient (Kg) of the air-CO2-water
 system depends on the flow rate of the gaseous phase and the composition of
 the starting gas mixture (air-CO2). With the increase in the total gas flow
 rate, with a constant composition of the starting gas mixture and constant
 fluid flow, the overall mass transfer coefficient increases. Increasing the
 amount of CO2 in the starting gas mixture at a constant flow rate of fluid
 and a constant ratio of the molar flow of the inert in the liquid and the
 gas-phase (L'/G') decreases the overall mass transfer coefficient.