Adsorption Equilibria and Performance of a Pressure Swing Adsorption Air Separation Unit

Abstract

Current pressure swing adsorption (PSA) air separation units operating on short cycle times suffer a reduction in product oxygen concentration when subjected to lower ambient temperatures (i.e., less than -10 C. This work investigates this problem based on analysis of adsorption equilibria, column breakthrough studies, and actual PSA system data. Pure and multicomponent data for nitrogen, oxygen, and air on molecular sieve 5A were collected at 24, -40, and -70 C up to pressures of 4.3 atmospheres absolute. Using a statistical thermodynamic model pure component data were adequately predicted over the entire temperature range (24 to -70 C). The multicomponent data were predicted at 24 C by a statistical thermodynamic model and ideal adsorbed solution theory. At the lower temperatures the gas mixture behaved nonideally.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1984
Accession Number
ADA142889

Entities

People

  • G. W. Miller

Organizations

  • Air Force Institute of Technology

Tags

Communities of Interest

  • Biomedical

DTIC Thesaurus Topics

  • Accuracy
  • Air Flow
  • Barometric Pressure
  • Chemical Synthesis
  • Chemistry
  • Computational Science
  • Crystal Structure
  • Flow Rate
  • Heat Energy
  • High Pressure
  • Isotherms
  • Mass Transfer
  • Measurement
  • Pressure Measurement
  • Silicates
  • Tectosilicates
  • Thermodynamics

Fields of Study

  • Environmental science

Readers

  • Combustion science or combustion engineering.
  • Electrochemical Engineering/ Fuel Cell Technologies
  • Regression Analysis.