量研学術機関リポジトリ「QST-Repository」は、国立研究開発法人 量子科学技術研究開発機構に所属する職員等が生み出した学術成果（学会誌発表論文、学会発表、研究開発報告書、特許等）を集積しインターネット上で広く公開するサービスです。 Welcome to QST-Repository where we accumulates and discloses the academic research results(Journal Publications, Conference presentation, Research and Development Report, Patent, etc.) of the members of National Institutes for Quantum Science and Technology.
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It is known that the chemical forms of tritium released from a
ceramic breeder blanket are hydrogen form and water form.
To recover tritiated water vapor, adoption of dryer that is
packed column of synthetic zeolite has been proposed. On
the other hand, synthetic zeolite is often used as a support
of precious metal catalyst. Such catalysts usually have a
capability of hydrogen isotope exchange between gas and
water vapor. If this catalyst is used to dryer, the dryer may
obtain a preferable function for tritium recovery by isotopic
exchange reaction. To assess such functions, reaction rate
should be estimated. The results of water adsorption
experiment on cation-exchanged mordenite-type zeolite
suggested the possibility that state of adsorbed water varied
by exchanged cation. So, in this work, precious metal
catalyst basedon cation-exchanged mordenite was
prepared, and the reaction rate of chemical exchange
between hydrogen and tritiated water was investigated
under temperature range between 30◦C and 80◦C by the
steady-state approximation. In the case of platinum on
Na-mordenite, the reaction between gaseous hydrogen and
tritiated water vapor was almost expressed as first-order
reaction concerning tritiated water vapor concentration.
Isotope exchange reaction of tritium on precious metal catalyst basedon cation-exchanged mordenite for blanket tritium recovery
