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- W296486042 abstract "The characteristic feature of adsorption in a fluidized bed is the random nature of mass transfer between the continuous phase and individual inclusions of the disperse phase. The adsorbent particles in a fluidized bed are in a state of chaotic motion caused by random interaction of the particles with turbulent formations of the gas or liquid and also by collision of the particles with each other and with the sides of the apparatus. They then move up or down in the bed and enter regions of higher or lower adsorbate concentrations in the continuous phase. Because of this the adsorbate concentration at the surface of individual adsorbent grains varies in a random manner with time. As was noted by Zolotarev, fluctuations of the adsorbate concentration at the particle surface under certain conditions make an additional contribution to the adsorption rate. In particular, Zolotarev concludes that in the case of a nonlinear isotherm, regardless of the character of the adsorption kinetics, fluctuations of the adsorbate concentration at the surface of the adsorbent grains lead to intensification of the process if the isotherm is concave, and to the reverse effect if the isotherm is convex. There have as yet been no mathematicalmore » models of adsorption in fluidized beds taking into account the effect of decrease or increase of the adsorption rate due to fluctuations of the adsorbate concentration at the surface of the adsorbent grains. The purpose of the present work was to formulate such a model and to estimate the magnitude of the above effect. The adsorption process is considered with reference to the operating conditions of a multisection column adsorber with fluidized adsorbent beds on the plates.« less" @default.
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- W296486042 date "1981-09-10" @default.
- W296486042 modified "2023-09-23" @default.
- W296486042 title "Influence of fluctuations of adsorbate concentration at the surface of adsorbent grains on the kinetics of adsorption in a fluidized bed" @default.
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