Pdで表面改質されたZrNi合金による重水素の吸蔵-脱離 : Ar搬送ガス中の重水素の回収

概要

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Pd-coating of Zr-based alloys is effective for avoiding surface poisoning by impurity gases such as N2, CO2 and so on. The effectiveness of electroless Pd-coating layers over ZrNi was investigated from view points of ab/desorption kinetics of deuterium and durability toward impurity gases in Ar. The rate determining steps of deuterium absorption and desorption were not altered by Pd-coating. The absorption obeyed first order and desorption second order kinetics. Regarding the durability toward impurity gases, the Pd-coating ZrNi (Pd/ZrNi) showed much higher affinity to deuterium carried by Ar flow than bare ZrNi. The former was particularly more capable at 573K of avoiding surface poisoning. Surface modification of Zr-based alloys by Pd-coating is thus effective against impurity gases and a packed column of Pd/ZrNi is applicable to the processing of hydrogen isotopes containing impurity gases.
富山大学の論文