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Process for regenerative sorption of CO.sub.2

  • US 3,865,924 A
  • Filed: 03/03/1972
  • Issued: 02/11/1975
  • Est. Priority Date: 03/03/1972
  • Status: Expired due to Term
First Claim
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1. A METHOD OF REMOVING CO2 FROM AGASES STREAM COMPRISING THE STEPS OF:

  • A. PASSING A CO2-CONTAINING INLET GAS STREAM INTO CONTACT WITH A SYNERGISTIC SORBENT COMPOSITION OF FINELY DIVIDED, PARTICULATE ALKALI METAL CARBONATE AND ALUMINA, SAID ALUMINA AND CARBONATE BEING SEPARATE DISCRETE PARTICLES AND HAVING BEEN GROUND TOGETHER TO PROVIDE SUCH SORBENT, TO SORB CO2 THEREINTO AND CONVERT SAID CARBONATE TO BICARBONATE, B. MAINTAINING SAID SORBENT COMPOSITION IN HYDRATED FROM, THEREBY TO REMOVE CO2 FROM SAID GASES STREAM;

    AND C. REGENERATING SAID SORBENT COMPOSITION BY SUPPLYING HEAT TO RECONVERT SAID BICARBONATE TO SAID CARBONATE FROM WHILE EVOLVING CO2 THEREFROM, WITHOUT FORMING A CRUST OVER SAID SORBENT.

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