DESIGN EQUATIONS AND TRANSIENT BEHAVIOUR OF THE COUNTER-CURRENT MOVING BED CHROMATOGRAPHIC REACTOR

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Abstract
The behaviour of the moving bed catalytic reactor is studied under the conditions when a reactant A is adsorbed on the countercurrently moving solid catalyst, reacts on its surface irreversibly to form a product B which is rapidly desorbed into a fluid phase. Local adsorption equilibrium of arbitrary form is assumed. The reaction may have any kinetics. The equations derived allow to calculate the length of the reactor required for any conversion. It is also shown that there exists a critical parameter σ such that the behaviour of the moving bed is similar to that of the fixed bed if 0 < σ < 1. This parameter is the maximum of the ratio of the equilibrium fluxes of the two phases. The results are illustrated on the example of the Fowler-Guggenheim adsorption isotherm.

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