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Isotopic distribution coefficient of tritiated water adsorbed on faujasite-type zeolite

Iwai, Yasunori; Yamanishi, Toshihiko

The fixed-bed adsorption process using zeolite has been studied as one of the promising processes for the recovery of tritiated water in the field of nuclear fusion. In H$$_{2}$$O-HTO binary systems, the difference in adsorption rate must be considered to obtain the natural distribution coefficient of tritiated water adsorbed on zeolite. The static method is probably the best approach to measure the distribution coefficient considering the difference in adsorption rate though a long time is needed to reach isotopic equilibrium. In this study, the influence of framework SiO$$_{2}$$/Al$$_{2}$$O$$_{3}$$ ratio ranging from 2.0 to 10.0 and of cations (K$$^{+}$$, Na$$^{+}$$, Ca$$^{2+}$$) on equilibrium distribution coefficient of tritiated water adsorbed on faujasite-type zeolite was systematically examined. The content of cation has a great effect on the distribution coefficient. The flamework SiO$$_{2}$$ to Al$$_{2}$$O$$_{3}$$ ratio of the X/Y type zeolite has a slight effect on the distribution coefficient.

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Category:Nuclear Science & Technology

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