SORPTION PUMPING OF HYDROGEN BY CRYODEPOSITS-PREDICTION OF SORPTION CAPACITY

Abstract

The applicability of several existing adsorption theories for predicting the equilibrium isotherms for the sorption of hydrogen (H2) by carbon dioxide (CO2) cryodeposits has been examined in the pressure range from 10 to the - 8th power to 10 to the -3rd power torr. It is demonstrated that the H2 sorption capacity of CO2 frost cryosorbents at temperatures between 12 and 20K may be accurately predicted by an equilibrium isotherm equation proposed by Dubinin and Radushkevich. This equation is then used to calculate families of sorption isotherms for CO2 frosts formed at various conditions and consequently having different structures. These results may be used to estimate the H2 capacity of cryosorption pumping systems which would employ CO2 frost as a cryosorbent.

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Document Details

Document Type
Technical Report
Publication Date
Feb 01, 1970
Accession Number
AD0700981

Entities

People

  • K. E. Tempelmeyer

Organizations

  • Arnold Engineering Development Complex

Tags

Communities of Interest

  • Energy and Power Technologies
  • Space

DTIC Thesaurus Topics

  • Adsorption
  • Air Force
  • Carbon Dioxide
  • Contracts
  • Critical Temperature
  • Desorption
  • Dioxides
  • Elements
  • Engineering
  • Equations
  • Heat Energy
  • Heat Of Vaporization
  • Hydrogen
  • Isotherms
  • Measurement
  • Potential Theory
  • Sorption

Readers

  • Computational Modeling and Simulation
  • Electrochemical Engineering/ Fuel Cell Technologies
  • Pavement Materials Engineering.