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Successive Volume Reduction of Hydrogen-Isotopic Gaseous Waste by Pressure Swing Adsorption Using SZ-13X Column

K. Kotoh, M. Tanaka, T. Tsuge, S. Moriyama, S. Takashima, Y. Asakura, T. Uda, T. Sugiyama

Fusion Science and Technology / Volume 60 / Number 2 / August 2011 / Pages 771-775

Safety & Environment / Proceedings of the Nineteenth Topical Meeting on the Technology of Fusion Energy (TOFE) (Part 2) /

For the purpose of application to volume reduction of tritiated hydrogen as gaseous waste, we carried out an experimental series of pressure swing adsorption (PSA) using a column packed with synthetic zeolite 13X (SZ-13X) at 77.4 K, where a cyclic PSA process was operated enriching D2 in a H2-D2 mixture while isolating H2 from this mixture. The result demonstrates successive reduction of a volume of this mixture with successively separating purified hydrogen volumes. It is reported here that the operational efficiency of volume reduction in the PSA process using the SZ-13X column is higher than that in the same PSA process using the same column but packed with SZ-5A. The latter is already obtained in a previous work. Comprehensively, the experimental results suggest that the PSA process is applicable to the volumetric reduction for regulating the storage inventory in a tritium waste management system.

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