Mass transfer between bubbles and the continuous phase in a fluidized bed of variable cross section
A study is made of mass transfer in an inhomogeneous fluidized bed whose cross section varies over the height. The field of the liquid phase around a bubble is constructed, conditions are obtained for the existence of a region of closed circulation of the liquid phase, and the boundaries of this region are determined. A solution is given to the problem of convective diffusion of the substance to the region of closed circulation, and the mass-transfer coefficient between a bubble and the continuous phase is determined as a function of the flow parameters. By the same token, the results of  are generalized to a fluidized bed of variable cross section. It is shown that in this case the mass transfer is improved.
KeywordsMass Transfer Liquid Phase Continuous Phase Flow Parameter Closed Circulation
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