THEORETICAL TREATMENT OF RAPID SORPTION KINETICS MEASURED IN BATCH ARRANGEMENT

Universal solution of a family of sorption kinetic models which are ba sed on superposition principle has been developed to describe sorption experiments in a closed system. The models account for the interactio ns of a sorbate-sorbent system with the apparatus which arise (i) from the mass balance condition in a closed system and (ii) from a finite rate of sorbate supply to the sorbent, the latter effect being of impo rtance particularly in rapid nonstationary kinetic processes. Theoreti cal uptake curves for die intracrystalline sorption kinetics in zeolit e crystals are exemplified using numerical solution of the correspondi ng Volterra integral equations which represent kinetic models of the o verall transient sorption process in the apparatus. The approach appea rs to be promising for treatment of sorption kinetics in multicomponen t systems.