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Title: Longitudinal dispersion coefficient depending on superficial velocity of hydrogen isotopes flowing in column packed with zeolite pellets at 77.4 K

Authors have been developing a cryogenic pressure swing adsorption system for hydrogen isotope separation. In the problem of its design and operation, it is necessary to predict the concentration profiles developing in packed beds of adsorbent pellets. The profiling is affected by the longitudinal dispersion of gas flowing in packed beds, in addition to the mass transfer resistance in porous media of adsorbent pellets. In this work, an equation is derived for estimating the packed-bed dispersion coefficient of hydrogen isotopes, by analyzing the breakthrough curves of trace D{sub 2} or HD replacing H{sub 2} adsorbed in synthetic zeolite particles packed columns at the liquefied nitrogen temperature 77.4 K. Since specialized for hydrogen isotopes, this equation can be considered to estimate the dispersion coefficients more reliable for the cryogenic hydrogen isotope adsorption process, than the existing equations. (authors)
Authors:
 [1] ;  [2] ; ; ;  [3] ;  [4] ;  [5]
  1. Faculty of Engineering, Kyushu University, Nishi-ku, Fukuoka (Japan)
  2. (Japan)
  3. Graduate School of Engineering, Kyushu University, Nishi-ku, Fukuoka (Japan)
  4. National Institute for Fusion Science, Oroshi-cho, Toki, Gifu (Japan)
  5. Faculty of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya (Japan)
Publication Date:
OSTI Identifier:
22429736
Resource Type:
Journal Article
Resource Relation:
Journal Name: Fusion Science and Technology; Journal Volume: 67; Journal Issue: 2; Conference: TRITIUM 2013: 10. International Conference on Tritium Science and Technology, Nice Acropolis (France), 21-25 Oct 2013; Other Information: Country of input: France; 10 refs.
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; ADSORBENTS; ADSORPTION; DISPERSION RELATIONS; DISPERSIONS; GAS FLOW; HYDROGEN; HYDROGEN ISOTOPES; MASS TRANSFER; NITROGEN; PACKED BEDS; PELLETS; POROUS MATERIALS; TEMPERATURE RANGE 0065-0273 K; ZEOLITES