Contribution à la modélisation dynamqiue simplifiée d'un procédé d'adsorption modulée en pression (P.S.A.)

Abstract : One of the objectives of this study was to build a model able to predict the transient comportment and to quickly estimate the state of the Pressure Swing Adsorption (P.S.A.) processes at the cyclic steady state. Computing time problems are still encountered today, whereas a fast and reliable simulator is necessary for the process,optimal dimensioning and even for its control. Two approaches were so adopted. The first one consists in accelerating the simulation of each step of the cycle by simplifying the model of bidispersed pellet of adsorbent. The approach used to simplify the pellet model is close to the one used to establish the traditional model of «~Linear Driving Force~». The influence on the model structure of the state variables choice, as well as the influence of space distribution of resistances to the mass transfer in the pellet have been studied . The column global model based on this pellet model led to simulations of breakthrough curves in good agreement with those in the literature. The second approach is based on the approximation of the cyclic process by an equivalent continuous process. The simulator obtained can estimate almost instantly the transient comportment and the cyclic steady state of the system. For kinetic separations, simulations using this model are in good agreement with those obtained using a traditional cyclic model. The other objective of this work was to design a P.S.A. pilot, entirely controlled by computer, which allows to follow the outlet compositions, as well as temperature profiles in each column. An experimental study has been done on this pilot. It relates to the separation of methane and carbon dioxide mixtures on a zeolite 5A. This study, associated with the experimental results in the literature, validates our first model.
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https://tel.archives-ouvertes.fr/tel-00008325
Contributor : Damien Leinekugel-Le-Cocq <>
Submitted on : Wednesday, February 2, 2005 - 9:23:37 AM
Last modification on : Friday, February 1, 2019 - 5:14:01 PM
Long-term archiving on : Friday, April 2, 2010 - 9:01:44 PM

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  • HAL Id : tel-00008325, version 1

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Damien Leinekugel-Le-Cocq. Contribution à la modélisation dynamqiue simplifiée d'un procédé d'adsorption modulée en pression (P.S.A.). Autre. Université Claude Bernard - Lyon I, 2004. Français. ⟨tel-00008325v1⟩

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