Fixed bed desorption behavior of gases with non-linear equilibria: Part I. Dilute, one component, isothermal systems

Autor: Jay J. Schnitzer, Imre Zwiebel, Christopher M. Kralik
Rok vydání: 1972
Předmět:
Zdroj: AIChE Journal. 18:1139-1147
ISSN: 1547-5905
0001-1541
DOI: 10.1002/aic.690180609
Popis: Generalized depletion curves for desorption (and Corresponding breakthrough curves for adsorption) were calculated for systems characterized by the Langmuir-type multicomponent equilibrium equation and controlled by the film type rate model. In contrast with adsorption where the nonkey (or less strongly adsorbed) component curves display overshoots above feed concentration, in desorption the key component depletion curves exhibit the instabilities in the form of inflections and curvatures. As in the one component case, the differences in the depletion and breakthrough curves may be related to the rate phenomena. The undulations in the key component depletion curves may be characterized by derivatives of the rate data. The major significance of these instabilities is to elongate the depletion curves, which in turn requires the expenditure of added effort during regeneration. Process modifications are indicated, which could suppress the instabilities. The predicted trends were confirmed by experimental depletion curves.
Databáze: OpenAIRE
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