Fixed-Bed adsorber dynamics in binary physisorption-diffusion
Autor: | O. Maynard Fuller, Vincent G. Gomes |
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Rok vydání: | 1994 |
Předmět: | |
Zdroj: | The Canadian Journal of Chemical Engineering. 72:622-630 |
ISSN: | 1939-019X 0008-4034 |
DOI: | 10.1002/cjce.5450720411 |
Popis: | Reactions carried out under conditions close to the equilibrium vapour pressure of the participating species involve physisorption on the catalyst surface. Such conditions are encountered for propene metathesis over rhenium oxide/γ-alumina catalyst at room temperature. The sorption-diffusion effects were tested by excluding effects due to reaction. Single-component sorption characteristics were determined by steady-state experiments. The model equations comprising several differential and nonlinear algebraic equations were solved by orthogonal collocation within the method of lines. The model predictions were tested against transient experiments performed in a gradientless, internal recirculation reactor. Les reactions menees dans des conditions proches de la pression de vapeur a l'equilibre des especes participantes entrainent une physisorption sur la surface du catalyseur. De telles conditions sont rencontrees lors de la metathese du propene sur un catalyseur d'oxyde de rhenium/γ-alumine a temperature ambiante. On a teste les effets de sorption-diffusion en excluant les effets dus a la reaction. Les caracteristiques de sorption des composants individuels ont ete determinees par des experiences en regime permanent. Les equations du modele comprenant plusieurs equations algebriques differentielles et non lineaires ont ete resolues par la methode des lignes resolue par collocation orthogonale. Les predictions du modele ont ete verifiees par rapport a des experiences en regime transitoire menees dans un reacteur de recirculation interne sans gradient. |
Databáze: | OpenAIRE |
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