Adsorption isotherms for tritium on various adsorbents at liquid nitrogen temperature

The cryosorption method is useful for extracting hydrogen isotopes from a h elium gas stream with a small amount of hydrogen isotopes. Therefore, infus ion reactors, this method is expected to be applied for the helium glow dis charge exhaust gas processing system and the blanket tritium recovery syste m. To design these systems, adsorption isotherms for each hydrogen isotope are needed, making it possible to estimate the amount of adsorption in a wi de pressure range. The amount of tritium adsorption on molecular sieve 5A, molecular sieve 4A, and activated carbon, which are potential adsorbents in the cryosorption bed, at liquid nitrogen temperature were quantified using the volumetric method. It was found that adsorption isotherms of tritium w ere also expressed with the two-site Langmuir model and that the obtained i sotherms were close to the reported isotherms, the Langmuir coefficients fo r which were estimated using a reduced mass of hydrogen isotopes.