This work deals with hydrogen storage in metal hydrides. Many ways can be used for hydrogen storage. In order to secure high pressurized vessels (700 bar), a layer of an intermetallic compound is added between an aluminum and a composite ones. The latter reinforces the structure while the former one is used as a natural barrier for hydrogen. In case of crack in the aluminum layer, the intermetallic compound acts as a getter material. This gives the thesis start point. First, the work has been focused on the modeling of Pressure Composition Isotherm equilibrium curves. A study of existing models has been developed. A new thermodynamic one takes into account the phase transformation and the thermic dependency. Second, kinetics has been studied. The attention is paid on one hand to the absorption in a single grain and on the other hand to the absorption in a granular bed. Finally, simulations have been conducted, based on the new thermodynamic model, absorption/desorption kinetics and heat and mass transfer. A parametric study has been performed to evaluate the influence of each parameter on the filing time.
