LrgpV1, Main, Exploration, bibRecord, 001E02

Modeling of hydrogen isotopes separation in a metal hydride bed

Identifieur interne : 001E02 ( Main/Exploration ); précédent : 001E01; suivant : 001E03

Modeling of hydrogen isotopes separation in a metal hydride bed

Auteurs : S. Charton [France] ; J. P. Corriou [France] ; D. Schweich [France]

Source :

Chemical engineering science [ 0009-2509 ] ; 1999.

RBID : Pascal:99-0063691

Descripteurs français

Pascal (Inist)
- Hydrogène Isotope, Hydrogène 1, Deutérium, Séparation isotopique, Echange isotopique, Palladium Hydrure, Palladium Deutériure, Condition non isotherme, Adsorption gaz solide, Système non linéaire, Hydrodynamique, Dispersion hydrodynamique, Perte charge, Transfert masse, Cinétique, Propriété thermodynamique, Transfert chaleur, Modélisation, 2860.

English descriptors

KwdEn :
- Deuterium, Gas solid adsorption, Heat transfer, Hydrodynamic dispersion, Hydrodynamics, Hydrogen 1, Hydrogen Isotopes, Isotope separation, Isotopic exchange, Kinetics, Mass transfer, Modelling, Non isothermal condition, Nonlinear systems, Palladium Deuterides, Palladium Hydrides, Pressure drop, Thermodynamic properties.

Abstract

A predictive model for hydrogen isotopes separation in a non-isothermal bed of unsupported palladium hydride particles is derived. It accounts for the non-linear adsorption-dissociation equilibrium, hydrodynamic dispersion, pressure drop, mass transfer kinetics, heat of sorption and heat losses at the bed wall. Using parameters from the literature or estimated with classical correlations, the model gives simulated curves in agreement with previously published experiments without any parameter fit. The non-isothermal behavior is shown to be responsible for drastic changes of the mass transfer rate which is controlled by diffusion in the solid-phase lattice. For a feed at 300 K and atmospheric pressure, the endothermic hydride-to-deuteride exchange is kinetically controlled, whereas the reverse exothermic exchange is nearly at equilibrium. Finally, a simple and efficient thermodynamic model for the dissociative equilibrium between a metal and a diatomic gas is proposed.

Affiliations:

Links toward previous steps (curation, corpus...)

to stream PascalFrancis, to step Corpus: 000C32
to stream PascalFrancis, to step Curation: 001312
to stream PascalFrancis, to step Checkpoint: 000B08
to stream Main, to step Merge: 002178
to stream Main, to step Curation: 001E02

Le document en format XML

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<term>Kinetics</term>
<term>Mass transfer</term>
<term>Modelling</term>
<term>Non isothermal condition</term>
<term>Nonlinear systems</term>
<term>Palladium Deuterides</term>
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<term>Hydrogène 1</term>
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<term>Séparation isotopique</term>
<term>Echange isotopique</term>
<term>Palladium Hydrure</term>
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<term>Condition non isotherme</term>
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<term>Dispersion hydrodynamique</term>
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<front><div type="abstract" xml:lang="en">A predictive model for hydrogen isotopes separation in a non-isothermal bed of unsupported palladium hydride particles is derived. It accounts for the non-linear adsorption-dissociation equilibrium, hydrodynamic dispersion, pressure drop, mass transfer kinetics, heat of sorption and heat losses at the bed wall. Using parameters from the literature or estimated with classical correlations, the model gives simulated curves in agreement with previously published experiments without any parameter fit. The non-isothermal behavior is shown to be responsible for drastic changes of the mass transfer rate which is controlled by diffusion in the solid-phase lattice. For a feed at 300 K and atmospheric pressure, the endothermic hydride-to-deuteride exchange is kinetically controlled, whereas the reverse exothermic exchange is nearly at equilibrium. Finally, a simple and efficient thermodynamic model for the dissociative equilibrium between a metal and a diatomic gas is proposed.</div>
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Modeling of hydrogen isotopes separation in a metal hydride bed

Modeling of hydrogen isotopes separation in a metal hydride bed

Source :

Descripteurs français

English descriptors

Abstract

Links toward previous steps (curation, corpus...)

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri