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A Feasibility Study of the Catalytic Reduction Method For Tritium Recovery from Tritiated Water Tritium Systems

Hiroshi Yoshida, Hidefumi Takeshita, Satoshi Konishi, Hideo Ohno, Toshimasa Kurasawa, Hitoshi Watanabe, Yuji Naruse

Fusion Science and Technology

Volume 5 / Number 2 / March 1984 / Pages 178-188


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Experimental and theoretical feasibility studies of a catalytic reduction method were carried out for application to the tritium recovery processes in fusion reactor systems. Experiments on the decomposition of water vapor were performed under the following conditions: temperatures of 350 to 650 K; an H2O vapor concentration of 103 to 104 ppm; a mole ratio of CO to H2O of 1 to 10; and a space velocity of 2 × 102 to 2 × 104 h−1. The catalyst used was a mixture of CuO, ZnO, and Cr2O3. It has been demonstrated that this method using the zinc-stabilized catalyst can be adapted to recover tritium from tritiated water with a high conversion ratio (>0.999 per one path) at comparatively low temperature (450 K). The catalytic rate equation and the rate constants determined by this work can be used for designing a practical catalytic reduction bed for the decomposition process of the tritiated water.

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