Abstract
Sorption equilibrium and rate relation of low-pressure hydrogen in commercial titanium sponge is needed for design of the helium purification system in a high-temperature gas reactor. Stepwise sorption experiments were performed in a high-vacuum Pyrex apparatus for 10-2-102 Pa between 723 and 1023 K.
After correction for thermal transpiration effects, equilibrium data are well correlated by a dissociation-type equation and the heat of sorption is determined. Sorption rate is controlled by solid diffusion at temperatures below 923 K, and solid diffusivity is obtained.
