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Ortho-Parahydrogen Conversion Studies

  • P. L. Barrick
  • D. H. Weitzel
  • T. W. Connolly
Conference paper
Part of the Advances in Cryogenic Engineering book series (ACRE, volume 1)

Abstract

Quantity production of liquid parahydrogen has been accomplished at the NBS-AEC Cryogenic Engineering Laboratory through use of a chromic oxide catalyst placed in the liquid receiver at the bottom of the hydrogen liquefier. (See Figure 1.) About 175 pounds of a commercial 20 percent chromic oxide on alumina or 100 pounds of a 30–35 percent chromic oxide on gel alumina are required to produce 95 percent parahydrogen at liquefaction rates of 210 to 240 liters per hour. It was found that nitrogen contamination of the chromic oxide catalyst does not influence its conversion activity whereas atmospheric air at room temperature definitely acts as a catalyst poison.1

Keywords

Chromic Oxide Liquid Hydrogen Percent Nickel Chamber Geometry Ammonium Nitrate Solution 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. 1.
    L. E. White, P. C. Vander Arend and P. L. Barrick, Technical Memorandum No. 22, NBS-AEC Cryogenic Engineering Laboratory, Boulder, Colorado.Google Scholar
  2. 2.
    L. G. Harrison and C. A. McDowell, Proc, Roy. Soc. A220, 77 (1953).Google Scholar

Copyright information

© Plenum Press, Inc., New York 1960

Authors and Affiliations

  • P. L. Barrick
    • 1
    • 2
  • D. H. Weitzel
    • 1
  • T. W. Connolly
    • 1
  1. 1.CEL National Bureau of StandardsBoulderUSA
  2. 2.Chemical Engineering DepartmentUniversity of ColoradoUSA

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