Modeling and experimental verification of the thermodynamic properties of hydrogen storage materials

A new mathematical model has been developed describing the thermodynamics of the hydrogen absorption and desorption process in Metal Hydrides via the gas phase. This model is based on first principles chemical and statistical thermodynamics and takes into account structural changes occurring inside...

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Veröffentlicht in:International journal of hydrogen energy Jg. 41; H. 6; S. 3904 - 3918
Hauptverfasser: Ledovskikh, A.V., Danilov, D.L., Vliex, M., Notten, P.H.L.
Format: Journal Article
Sprache:Englisch
Veröffentlicht: Elsevier Ltd 19.02.2016
Schlagworte:
Chemical potential
Computer simulation
Exact solutions
Gas phase hydrogen storage
Hydrogen storage
Hydrogen storage materials
Lattice gas model
Mathematical analysis
Mathematical models
Modelling
Pressure Composition Isotherms
Thermodynamics
Van 't Hoff
Thermodynamics
Pressure Composition Isotherms
Van 't Hoff
Lattice gas model
Gas phase hydrogen storage
ISSN:0360-3199, 1879-3487
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Zusammenfassung:A new mathematical model has been developed describing the thermodynamics of the hydrogen absorption and desorption process in Metal Hydrides via the gas phase. This model is based on first principles chemical and statistical thermodynamics and takes into account structural changes occurring inside hydrogen storage materials. A general state equation has been derived considering the chemical potentials of reacting species and volume expansion, from which the equilibrium hydrogen pressure dependence on the absorbed hydrogen content can be calculated. The model is able to predict the classical Van ’t Hoff equation from first-principle analytical expressions and gives more insight into the various hydrogen storage characteristics. Pressure-Composition Isotherms have been simulated for various hydride-forming materials. Excellent agreement between simulation results and experimental data has been found in all cases. •Mathematical modeling of Pressure Composition Isotherms of Hydrogen storage materials.•Thermodynamic model experimentally verified.•Generalized form Van ′t Hoff relationship derived from first principles thermodynamics.•Palladium and intermetallic (non)-stoichiometric compounds modeled.
Bibliographie:ObjectType-Article-1
SourceType-Scholarly Journals-1
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ISSN:0360-3199
1879-3487
DOI:10.1016/j.ijhydene.2015.11.038