Caractérisation des adsorbants pour la purification de l'hydrogène par adsorption modulée en pression

Abstract : Pressure Swing Adsorption (PSA) is a gas separation and purification process. It is based on the difference of adsorption capacity of a porous medium under different pressures. The performance determination of a specific adsorbent in such a process is a difficult problem, commonly solved by building a scaled-down process and by evaluating the adsorbent by experiments. This method requires time and is generally expensive. An other approach for evaluating the solid is purely numeric simulation. But the simulation of a complete PSA system is difficult, because of the large number of physical parameters and phenomena involved. A simple evaluation method would therefore be useful, at [east in the case of Hydrogen purification by PSA. This work is composed of both experimental and numeric studies, and shows that developing a simplified PSA model in parallel with some experiments can provide a good level of representation of the process. Evaluation of adsorbent performance with a simplified method consists in the determination of the dynamic working capacity of the solid in successive adsorption and desorption steps in cycles. The results of this method are in good agreement with the results of a complete simulated PSA. It also has the advantage of being less CPU-intensive and of giving results about parameters that are difficult to obtain by experience only.
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http://docnum.univ-lorraine.fr/prive/INPL_T_1999_MADRAU_S.pdf
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Submitted on : Thursday, March 29, 2018 - 12:49:58 PM
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Stéphane Madrau. Caractérisation des adsorbants pour la purification de l'hydrogène par adsorption modulée en pression. Alimentation et Nutrition. Institut National Polytechnique de Lorraine, 1999. Français. ⟨NNT : 1999INPL136N⟩. ⟨tel-01750590⟩

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