Abstract:

The volumetric mass transfer eoeflficients in different operating conditions were measured by means of chemical absorption on a self-developed muhistaged spraying rotating packed bed.A mathematical model describing the mass transfer between the liquid and the gas in the packed bed was then established based on the double-film theory.Experimental results show that the volumetric mass transfer coefficient increases with the liquid and gas fluxes.Moreover,an equation expressing the mass transfer coefficient in droplet was induced according to the experimental data,and that,when a droplet leaves the wires,it turns into the spraying area under the action of centrifugal force,and the high circulation speed may result in a great mass transfer coefficient in the droplet.

Key words: rotating packed bed, mass transfer model, double film theory, muhistaged spraying