The kinetics of the sorption of molecular hydrogen by ZrCo and Zr0.8Ti
0.3Mn1.9 was investigated as function of temperature at several consta
nt pressures of hydrogen. A comparison between the isothermal hydrogen
sorption rates by ZrCo, Zr0.8Ti0.3Mn1.9 and LaNi4.7Al0.3 is given and
reaction mechanisms are discussed. From fittings of the experimental
results to well known gas/solid reaction rate laws it was concluded th
at the reaction mechanisms of the reaction with ZrCo is complex and de
pendant upon the prevailing reaction conditions, The hydrogen sorption
rate by the powder of all three IMC's was found to be second order in
hydrogen pressure.