Adsorption Equilibria of Krypton, Xenon, Nitrogen and Their Mixtures on Molecular Sieve 5A and Activated Charcoal

概要

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The adsorption equlilbria of Kr, Xe and N2, which are constituents of the off-gas from nuclear reprocessing processes, on representative adsorbents (Molecular Sieve 5A (MA5A) and activated charcoal) were studied. Adsorption experiments were conducted in the temperature range of 77 to 323K using a packed bed column. The adsorption isotherms for the activated charcoal adsorbent were successfully correlated by the Langmuir (Kr-Xe, Kr-N2 systems) were also performed, and the results suggest that the coexistence of Xe greatly inhibits the adsorption of Kr. The coexistence of large amounts of N2 was also found to inhibit the adsorption of Kr. The experimental results for the adsorption equilibrium of binary component systems of the activated charcoal adsorbent were well reproduced by the vacancy solution model without parameter fitting. The binary adsorption equilibrium on the MS5A adsorbent is rather well predicted by the ideal adsorbed solution model without parameter fitting. The use of the vacancy solution model for this adsorption system requires the optimization of parameters, but binary adsorption equilibrium is well reproduced with the optimized parameters.
社団法人日本原子力学会の論文
1999-09-25