Collect. Czech. Chem. Commun. 1994, 59, 989-1000

Theoretical Treatment of Rapid Sorption Kinetics Measured in Batch Arrangement

André Mickea, Peter Struvea, Milan Kočiříkb and Arlette Zikánováb

a Centre of Heterogeneous Catalysis, Rudower Chaussee 5, 12489 Berlin, Germany
b J. Heyrovský Institute of Physical Chemistry, Academy of Sciences of the Czech Republic, 182 23 Prague 8, Czech Republic


Universal solution of a family of sorption kinetic models which are based on superposition principle has been developed to describe sorption experiments in a closed system. The models account for the interactions 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 importance particularly in rapid nonstationary kinetic processes. Theoretical uptake curves for the intracrystalline sorption kinetics in zeolite crystals are exemplified using numerical solution of the corresponding Volterra integral equations which represent kinetic models of the overall transient sorption process in the apparatus. The approach appears to be promising for treatment of sorption kinetics in multicomponent systems.