On the nonlinear wave theory for dynamics of binary distillation columns

The nonlinear wave theory is further strengthened by including the dissipation effect at column ends as well as feed and product side streams and nonuniform flow rates. With the inclusion of this effect in a quantitative way, the generalized model can be used to approximate, with fairly simple mathe...

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Bibliographic Details
Published in:AIChE journal 1995-01, Vol.41 (1), p.190-194
Main Author: Hwang, Yng-Long
Format: Article
Language:English
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Summary:The nonlinear wave theory is further strengthened by including the dissipation effect at column ends as well as feed and product side streams and nonuniform flow rates. With the inclusion of this effect in a quantitative way, the generalized model can be used to approximate, with fairly simple mathematics, the very slow return to a balanced steady state in the asymmetric dynamics. In addition to the column-end effect, the inclusion of feed and product side streams supplies a more precise criterion for a balanced (optimal) operating condition of a fractionating column. This provides a stepping-stone for the expansion of the nonlinear wave theory to multicomponent distillation. The generalized wave model also accounts for the variation of molar flow rates, which may result from significantly different heats of vaporization of the components or from a considerable heat loss from the column.
ISSN:0001-1541
1547-5905
DOI:10.1002/aic.690410119