Investigation on the hydrogen storage stability and hydrogenation kinetics of titanium sponge
摘要
The characterization of hydrogen adsorption thermodynamic and kinetic parameters is essential for predicting and rational designing elements that will make up nuclear fusion reactors. Titanium sponge is a promising material for hydrogen isotopes storage thanks to its stability, effectiveness, and economical process. Therefore, it is important to investigate the experimental adsorption data for hydrogen storage of titanium sponge, including lifespan, hydrogenation thermodynamics and kinetics. Herein, a commercial titanium sponge exhibits excellent hydrogen adsorption and desorption stability even after 30 cycles. During the adsorption process, the α-β phase transition and β-δ phase transitions were observed. The fitting equilibrium pressure of hydrogen absorption at room temperature was found to be 2.07 × 10–4 Pa. The adsorbed hydrogen can be released entirely at 800 °C when the pressure of system is lower than the equilibrium hydrogen pressure of titanium hydride. This work shows that titanium sponges present a practical solution for the stable and efficient storage of hydrogen isotopes.