A Model of Hydrogen Desorption Kinetics Controlled both by Interface and Surface Reactions for Metal Hydrides

The desorption kinetics was modelled with the both interface- and surface reactions as rate-controlling steps. It has been shown analytically, that in the model of ‘shrinking core’ desorption, the finite hydride-decomposition-rate causes a modified slope of kinetics. The dependence of desorption time on the powder particle size has the same power of order as for the surface controlled desorption.