Comparison on two test methods of desorption kinetics

p-t curves of hydrogen desorption by titanium hydride were investigated at 350-550 degree C using the methods of varying temperature and keeping temperature in a constant volume system. The desorption rate constants of hydrogen desorption by titanium hydride at different temperatures are determined by using the method of the reaction rate analysis and the obtained activation energy of varying temperature and keeping temperature method are (22.1±2.5)kJ.mol-1 and (27.1±0.4)kJ.mol-1 respectively, for analysis we consider that the activation energy value obtained by keeping temperature method is precise. (authors)