Abstract
The effects of the resin particle shrinking and swelling which occur during sorption operations involving beds of ion exchange resins are elucidated for two multicomponent processes—the elution of a bed uniformly presaturated with a two-solute feed, and the ion exclusion separation of a finite slug of a two-solute feed. The investigation was performed via the numerical integration of finite-difference forms of the relevant equations. Several unique phenomena (shifting of concentration profiles, concentrating effects in certain zones) are seen to arise which would not be revealed by classical “static bed” descriptions. This study indicates that shrinking and swelling effects must be taken into account if an accurate theoretical description of such operations is desired.
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