Adsorption Characteristics of Krypton and Xenon as Off-gas of Nuclear Reprocessing

摘要

The adsorption characteristics of Krypton and Xenon, which are constituents of the off-gas from the nuclear reprocssing process, on representative adsorbents (MS 5 A and activated charcoal) were studied. Adsorption experiments were conducted at temperatures ranging from 195 to 323 K using a packed bed column. Experimetnal results reveal that Xe has higher affinity to the adsorbents. It was also demonstrated that the activated charcoal adsorbents have larger adsorption capacity for both Kr and Xe. The vacancy solut ion model successfully correlates the adsorption isotherms over wide partial pressure and temperature ranges. The adsorption experiments on the binary component system (Kr-Xe) systems were perforemd, and the results suggest that the coexistence of Xe greatly inhibits the adsorption of Kr. The experimental results for the adsorption equilibrium of binary component systems were well reproduced by the vacancy solution mode.