Shell-core models for ion-exchanger loading in finite bath: sorption of aqueous sulphur dioxide on cross-linked poly (4-vinyl pyridine) (original) (raw)

1994

Abstract

Two mathematical models to describe the loading of ion-exchange resin beads following shell-core behaviour under finite bath conditions are developed. An analytical solution is obtained for the model based on a simplifying assumption of quasi-steady diffusion, while the model based on non-quasi-stationary diffusion is converted by finite integral transform to a system of first order differential equations, which are then solved by numerical means. The two models, tested with sorption data of aqueous sulphur dioxide on cross-linked poly(4-vinyl pyridine) resin (ReillexTMHP)(Reillex^{TM} HP)(ReillexTMHP) measured under finite bath conditions, yield comparable results (29 refs.)

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