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Multiple stage sorption and desorption process and apparatus

  • US 5,291,942 A
  • Filed: 05/24/1993
  • Issued: 03/08/1994
  • Est. Priority Date: 05/24/1993
  • Status: Expired due to Fees
First Claim
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1. A process for multi-stage sorption and desorption comprising:

  • passing process gas in contact with a low temperature salt sorbing said gas at a lower temperature than a high temperature salt in thermal conduction relation thereto and rejecting the heat of sorption;

    passing hot thermal supply gas in gas isolated and conductive thermal exchange relation with said high temperature salt having prior sorbed process gas creating a thermal supply heat wave passing through said high temperature salt from a hot thermal supply gas exchange side to an opposite side in gas isolated thermal conduction relation and thermal exchange with said low temperature salt, thereby desorbing process gas from said high temperature salt;

    removing desorbed process gas from said high temperature salt;

    ceasing passage of said hot thermal supply gas when said thermal supply heat wave reaches said high temperature salt opposite side;

    passing said thermal supply heat wave from said high temperature salt opposite side through said low temperature salt having prior sorbed process gas;

    passing process gas in contact with said high temperature salt sorbing said process gas at a higher temperature than said low temperature salt and passing the heat of sorption by said high temperature salt to and through said low temperature salt having prior sorbed process gas, heat from said thermal supply wave and from said heat of sorption by said high temperature salt desorbing process gas from said low temperature salt;

    removing desorbed process gas from said low temperature salt; and

    repeating the above cycle.

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