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Dynamic adsorption properties of Kr and Xe isotopes in charcoal

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Abstract

The dynamic adsorption of Kr and Xe in activated charcoal were measured. The temperature dependence of breakthrough curves for individual isotopes of85mKr,87Kr,88Kr and135Xe have been determined from the γ-spectra at temperatures from 78 K to 291 K. The effective hold up and dynamic adsorption coefficient have been deduced. We find that adsorption is very sensitive to temperature and also depends on the size rather than on the mass of the adsorbed atom. Form total growth radioactivity, the time dependent brakthrough curves at the temperatures of 113, 195 and 220 K have been constructed. The curves were analyzed and compared with the model calculations. Fick's law describing the mass transfer of gas into porous solid was employed to obtain the adsorption coefficient from fitting the experimental data. The results show fairly good agreement between model predictions and the experiments.

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Authors and Affiliations

  1. Nuclear Engineering Department, National Tsing-Hua University, 30043, Hsin-chu, Taiwan (Republic of China)

    C. L. Sun, J. C. Chen & Y. W. Yu

  2. Department of Chemical Engineering, National Tsing-Hua University, 30043, Hsin-chu, Taiwan (Republic of China)

    H. C. Ha, C. S. Lu & T. Y. Lee

Authors
  1. C. L. Sun
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  2. J. C. Chen
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  3. Y. W. Yu
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  4. H. C. Ha
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  5. C. S. Lu
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  6. T. Y. Lee
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Sun, C.L., Chen, J.C., Yu, Y.W. et al. Dynamic adsorption properties of Kr and Xe isotopes in charcoal. Journal of Radioanalytical and Nuclear Chemistry, Articles 181, 291–299 (1994). https://doi.org/10.1007/BF02037635

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  • DOI: https://doi.org/10.1007/BF02037635

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