Modeling of hydrogen storage in hydride-forming materials : equilibrium gas-phase kinetics

A. Ledovskikh, D. Danilov, P.H.L. Notten

Research output: Contribution to journalArticleAcademicpeer-review

14 Citations (Scopus)
103 Downloads (Pure)

Abstract

A kinetic model has been developed, describing the kinetics of the hydrogen storage reactions in hydride-forming materials under equilibrium conditions. Based on first principles chemical reaction kinetics and statistical thermodynamics, the model is able to describe the complex processes occurring in hydrogen storage systems, including phase transitions. A complete set of equations, governing pressure-composition isotherms in both solid-solution and two-phase coexistence regions has been obtained. General expressions for rate constant dependencies have been proposed, using well-defined phase-dependent Hamiltonians for the hydrogen energy state at the surface and in the bulk of hydride-forming materials. The characteristics of both model (LaNiyCu1.0) and commercial, misch-metal-based AB5-type materials at different compositions and temperatures have been simulated. Good agreement between experimental and theoretical results for the pressure-composition isotherms has been found in all cases.
Original languageEnglish
Article number064106
Pages (from-to)064106-1/16
Number of pages16
JournalPhysical Review B
Volume76
Issue number6
DOIs
Publication statusPublished - 2007

Fingerprint

Dive into the research topics of 'Modeling of hydrogen storage in hydride-forming materials : equilibrium gas-phase kinetics'. Together they form a unique fingerprint.

Cite this