Method of determining the purity of oxygen present in an oxygen-enriched gas produced from an oxygen delivery system
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United States of America Patent
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May 25, 2010
Grant Date -
Aug 27, 2009
app pub date -
Feb 21, 2008
filing date -
Feb 21, 2008
priority date (Note) -
Expired
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Abstract
A method of determining the purity of oxygen present in an oxygen-enriched gas produced from an oxygen delivery system is disclosed. The oxygen delivery system includes at least one sieve bed having a nitrogen-adsorbing material disposed therein and configured to adsorb nitrogen from a feed gas introduced into the at least two sieve beds via a pressure-swing adsorption cycle. The method includes determining a quantity of nitrogen adsorbed by the nitrogen-adsorbing material by inferring an effective volume of the at least one sieve bed based on a pressure change of the at least one sieve bed.
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