Modeling of temporal behavior of isotopic exchange between gaseous hydrogen and palladium hydride power Metadata

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Title

  • Main Title Modeling of temporal behavior of isotopic exchange between gaseous hydrogen and palladium hydride power

Creator

  • Author: Melius, C F
    Creator Type: Personal
  • Author: Foltz, G W
    Creator Type: Personal

Publisher

  • Name: Sandia Livermore Laboratory
    Place of Publication: Livermore, California
    Additional Info: Sandia National Labs., Livermore, CA (USA)

Date

  • Creation: 1987-01-01

Language

  • English

Description

  • Content Description: A parametric rate-equation model is described which depicts the time dependent behavior of the isotopic exchange process occurring between the solid and gas phases in gaseous hydrogen (deuterium) flows through packed-powder palladium deuteride (hydride) beds. The exchange mechanism is assumed to be rate-limited by processes taking place on the surface of the powder. The fundamental kinetic parameter of the model is the isotopic exchange probability, p, which is the probability that an isotopic exchange event occurs during a collision of a gas phase atom with the surface. Isotope effects between the gas and solid phases are explicitly included in terms of the isotope separation factor, ..cap alpha... Results of the model are compared with recent experimental measurements of isotope exchange in the ..beta..-phase hydrogen/palladium system and, using a literature value of ..cap alpha.. = 2.4, a good description of the experimental data is obtained for p approx. 10/sup -7/. In view of the importance of the isotope effects in the hydrogen/palladium system and the range of ..cap alpha.. values reported for the ..beta..-phase in the literature, the sensitivity of the model results to a variation in the value of ..cap alpha.. is examined.
  • Physical Description: 24 pages

Subject

  • Keyword: Isotopic Exchange
  • Keyword: Transition Element Compounds 400202* -- Isotope Effects, Isotope Exchange, & Isotope Separation
  • Keyword: Nuclei
  • Keyword: Hydrides
  • Keyword: Hydrogen Isotopes
  • Keyword: Isotopes
  • Keyword: Deuterium Compounds
  • STI Subject Categories: 37 Inorganic, Organic, Physical And Analytical Chemistry
  • Keyword: Deuterium
  • Keyword: Kinetics
  • Keyword: Deuterides
  • Keyword: Hydrogen Compounds
  • Keyword: Light Nuclei
  • Keyword: Palladium Compounds
  • Keyword: Odd-Odd Nuclei
  • Keyword: Palladium Hydrides
  • Keyword: Isotope Effects
  • Keyword: Stable Isotopes

Source

  • Other Information: Portions of this document are illegible in microfiche products. Original copy available until stock is exhausted

Collection

  • Name: Office of Scientific & Technical Information Technical Reports
    Code: OSTI

Institution

  • Name: UNT Libraries Government Documents Department
    Code: UNTGD

Resource Type

  • Report

Format

  • Text

Identifier

  • Other: DE87007162
  • Report No.: SAND-86-8244
  • Grant Number: AC04-76DR00789
  • DOI: 10.2172/6720738
  • Office of Scientific & Technical Information Report Number: 6720738
  • Archival Resource Key: ark:/67531/metadc1190496

Note

  • Display Note: NTIS, PC A02/MF A01; 1.
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