Dynamics of continuous countercurrent mass-transfer processes—III. Multicomponent systems

In earlier papers, a differential model has been presented for the dynamics of countercurrent mass-transfer processes in single-component systems. This paper extends the approximations developed in Part II to multicomponent systems by adapting an equilibrium theory for fixed beds based on coherence...

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Bibliographic Details
Published in:Chemical engineering science 1989, Vol.44 (7), p.1547-1568
Main Authors: Hwang, Yng-Long, Friedrich G., Helfferich
Format: Article
Language:English
Subjects:
Applied sciences
Chemical engineering
Exact sciences and technology
Heat and mass transfer. Packings, plates
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Summary:In earlier papers, a differential model has been presented for the dynamics of countercurrent mass-transfer processes in single-component systems. This paper extends the approximations developed in Part II to multicomponent systems by adapting an equilibrium theory for fixed beds based on coherence of concentration waves to countercurrent processes. The analysis focuses on the propagation of disturbance waves on nonuniform steady-state backgrounds and takes into account the critical column-end effect observable only under nonequilibrium conditions. This simplified approach provides a better understanding of physical phenomena and a handy tool for quick predictions of dynamic response patterns, the knowledge of which is useful for upgrading the control and design of countercurrent columns.
ISSN:0009-2509
1873-4405
DOI:10.1016/0009-2509(89)80032-6