Modeling of hydrogen isotopes separation in a metal hydride bed
Identifieur interne : 001F30 ( Main/Exploration ); précédent : 001F29; suivant : 001F31Modeling of hydrogen isotopes separation in a metal hydride bed
Auteurs : S. Charton [France] ; J. P. Corriou [France] ; D. Chweich [France]Source :
- Chemical Engineering Science [ 0009-2509 ] ; 1998.
English descriptors
- KwdEn :
- Activation energy, Andreev, Atmospheric pressure, Atomic fraction, Atomic fractions, Axial, Axial dispersion, Charton, Chemical engineering science, Chromatographic processes, Chromatography, Classical correlations, Common metals, Constant stoichiometry, Diffusion, Dimensionless, Dispersion, Elsevier science, Endothermic, Endothermic exchange, Enthalpy, Equilibrium, Equilibrium model, Exothermic, Exothermic exchange, Experimental conditions, Experimental measurements, Experimental results, External mass transfer, External mass transfer control, Foltz, Force model, Full model, Gaseous hydrogen, Heat balance equation, Heat capacities, Heat capacity, Hydride, Hydride phase, Hydrogen isotope, Hydrogen isotope exchange, Hydrogen isotopes, Hydrogen isotopes separation, Internal energy, Isotope, Isotopic, Isotopic equilibrium, Isotopic exchange, Kinetic theory, Kinetics, Local equilibrium, Mass balance, Mass transfer, Mass transfer kinetics, Mass transfer resistance, Melius, Melius model, Metal hydride, Metal hydride beds, Metal powder, Model accounting, Mole fraction, Mole fractions, Palladium, Palladium hydride, Palladium hydride powder, Partial equations, Pressure drop, Pure isotopes, Separation factor, Solid phase, Stoichiometry, Technical report department, Thermal conductivity, Thermodynamic model, Total number, Unit mass, Upwind approximations.
- Teeft :
- Activation energy, Andreev, Atmospheric pressure, Atomic fraction, Atomic fractions, Axial, Axial dispersion, Charton, Chemical engineering science, Chromatographic processes, Classical correlations, Common metals, Constant stoichiometry, Dimensionless, Dispersion, Elsevier science, Endothermic, Endothermic exchange, Enthalpy, Equilibrium model, Exothermic, Exothermic exchange, Experimental conditions, Experimental measurements, Experimental results, External mass transfer, External mass transfer control, Foltz, Force model, Full model, Gaseous hydrogen, Heat balance equation, Heat capacities, Heat capacity, Hydride, Hydride phase, Hydrogen isotope exchange, Hydrogen isotopes, Hydrogen isotopes separation, Internal energy, Isotope, Isotopic, Isotopic equilibrium, Isotopic exchange, Kinetic theory, Local equilibrium, Mass balance, Mass transfer, Mass transfer kinetics, Mass transfer resistance, Melius, Melius model, Metal hydride, Metal hydride beds, Metal powder, Model accounting, Mole fraction, Mole fractions, Palladium, Palladium hydride, Palladium hydride powder, Partial equations, Pressure drop, Pure isotopes, Separation factor, Solid phase, Stoichiometry, Technical report department, Thermal conductivity, Thermodynamic model, Total number, Unit mass, Upwind approximations.
Abstract
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 300K 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.
Url:
DOI: 10.1016/S0009-2509(98)00205-X
Affiliations:
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xml:lang="en"><term>Activation energy</term><term>Andreev</term><term>Atmospheric pressure</term><term>Atomic fraction</term><term>Atomic fractions</term><term>Axial</term><term>Axial dispersion</term><term>Charton</term><term>Chemical engineering science</term><term>Chromatographic processes</term><term>Chromatography</term><term>Classical correlations</term><term>Common metals</term><term>Constant stoichiometry</term><term>Diffusion</term><term>Dimensionless</term><term>Dispersion</term><term>Elsevier science</term><term>Endothermic</term><term>Endothermic exchange</term><term>Enthalpy</term><term>Equilibrium</term><term>Equilibrium model</term><term>Exothermic</term><term>Exothermic exchange</term><term>Experimental conditions</term><term>Experimental measurements</term><term>Experimental results</term><term>External mass transfer</term><term>External mass transfer control</term><term>Foltz</term><term>Force model</term><term>Full model</term><term>Gaseous hydrogen</term><term>Heat balance equation</term><term>Heat capacities</term><term>Heat capacity</term><term>Hydride</term><term>Hydride phase</term><term>Hydrogen isotope</term><term>Hydrogen isotope exchange</term><term>Hydrogen isotopes</term><term>Hydrogen isotopes separation</term><term>Internal energy</term><term>Isotope</term><term>Isotopic</term><term>Isotopic equilibrium</term><term>Isotopic exchange</term><term>Kinetic theory</term><term>Kinetics</term><term>Local equilibrium</term><term>Mass balance</term><term>Mass transfer</term><term>Mass transfer kinetics</term><term>Mass transfer resistance</term><term>Melius</term><term>Melius model</term><term>Metal hydride</term><term>Metal hydride beds</term><term>Metal powder</term><term>Model accounting</term><term>Mole fraction</term><term>Mole fractions</term><term>Palladium</term><term>Palladium hydride</term><term>Palladium hydride powder</term><term>Partial equations</term><term>Pressure drop</term><term>Pure isotopes</term><term>Separation factor</term><term>Solid phase</term><term>Stoichiometry</term><term>Technical report department</term><term>Thermal conductivity</term><term>Thermodynamic model</term><term>Total number</term><term>Unit mass</term><term>Upwind approximations</term></keywords><keywords scheme="Teeft" xml:lang="en"><term>Activation energy</term><term>Andreev</term><term>Atmospheric pressure</term><term>Atomic fraction</term><term>Atomic fractions</term><term>Axial</term><term>Axial dispersion</term><term>Charton</term><term>Chemical engineering science</term><term>Chromatographic processes</term><term>Classical correlations</term><term>Common metals</term><term>Constant stoichiometry</term><term>Dimensionless</term><term>Dispersion</term><term>Elsevier science</term><term>Endothermic</term><term>Endothermic exchange</term><term>Enthalpy</term><term>Equilibrium model</term><term>Exothermic</term><term>Exothermic exchange</term><term>Experimental conditions</term><term>Experimental measurements</term><term>Experimental results</term><term>External mass transfer</term><term>External mass transfer control</term><term>Foltz</term><term>Force model</term><term>Full model</term><term>Gaseous hydrogen</term><term>Heat balance equation</term><term>Heat capacities</term><term>Heat capacity</term><term>Hydride</term><term>Hydride phase</term><term>Hydrogen isotope exchange</term><term>Hydrogen isotopes</term><term>Hydrogen isotopes separation</term><term>Internal energy</term><term>Isotope</term><term>Isotopic</term><term>Isotopic equilibrium</term><term>Isotopic exchange</term><term>Kinetic theory</term><term>Local equilibrium</term><term>Mass balance</term><term>Mass transfer</term><term>Mass transfer kinetics</term><term>Mass transfer resistance</term><term>Melius</term><term>Melius model</term><term>Metal hydride</term><term>Metal hydride beds</term><term>Metal powder</term><term>Model accounting</term><term>Mole fraction</term><term>Mole fractions</term><term>Palladium</term><term>Palladium hydride</term><term>Palladium hydride powder</term><term>Partial equations</term><term>Pressure drop</term><term>Pure isotopes</term><term>Separation factor</term><term>Solid phase</term><term>Stoichiometry</term><term>Technical report department</term><term>Thermal conductivity</term><term>Thermodynamic model</term><term>Total number</term><term>Unit mass</term><term>Upwind approximations</term></keywords></textClass><langUsage><language ident="en">en</language></langUsage></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">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 300K 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></front></TEI><affiliations><list><country><li>France</li></country><region><li>Auvergne-Rhône-Alpes</li><li>Grand Est</li><li>Lorraine (région)</li><li>Rhône-Alpes</li></region><settlement><li>Nancy</li><li>Villeurbanne</li></settlement></list><tree><country name="France"><region name="Grand Est"><name sortKey="Charton, S" sort="Charton, S" uniqKey="Charton S" first="S." last="Charton">S. Charton</name></region><name sortKey="Chweich, D" sort="Chweich, D" uniqKey="Chweich D" first="D." last="Chweich">D. Chweich</name><name sortKey="Corriou, J P" sort="Corriou, J P" uniqKey="Corriou J" first="J. P." last="Corriou">J. P. Corriou</name><name sortKey="Corriou, J P" sort="Corriou, J P" uniqKey="Corriou J" first="J. P." last="Corriou">J. P. Corriou</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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