Hydrogenation and dehydrogenation kinetics of sponge titanium produced in Panzhihua

The hydrogenation and dehydrogenation kinetics of commercial grade sponge titanium produced in Panzhihua has been studied over the temperature range from 400 to 600°C using a pressure-composition-temperature (PCT) system. The reaction rate constants of the hydrogenation and dehydrogenation processes are determined using the method of reaction rate analysis in a constant volume system. The apparent activation energy values obtained from the Arrhenius equation were (34.42±0.02) and (29.93±0.01) kJ/mol for hydrogenation and dehydrogenation, respectively. These results suggest that the hydrogenation and dehydrogenation processes are dictated by the diffusivity of hydrogen.