Contribution à la modélisation dynamique 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 : Tuesday, December 6, 2005 - 10:21:53 PM
Last modification on : Wednesday, November 20, 2019 - 3:04:08 AM
Long-term archiving on : Friday, November 25, 2016 - 9:57:21 AM

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  • HAL Id : tel-00008325, version 2

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Damien Leinekugel-Le-Cocq. Contribution à la modélisation dynamique simplifiée d'un procédé d'adsorption modulée en pression (P.S.A.). Autre. Université Claude Bernard - Lyon I, 2004. Français. ⟨tel-00008325v2⟩

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