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METHOD OF REGENERATING ABSORBENT

  • US 20080227626A1
  • Filed: 03/07/2008
  • Published: 09/18/2008
  • Est. Priority Date: 03/09/2007
  • Status: Active Grant
First Claim
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1. A method of regenerating an absorbent comprising:

  • preparing a reactor having opened opposite ends, one end of which being connected to a gas inlet portion for introducing a feedstock gas and steam and the other end being connected to a discharge portion of reforming reaction gas;

    filling the reactor with a reforming catalyst and an absorbent comprising lithium silicate for absorbing carbon dioxide;

    feeding the feedstock gas and the steam via the gas inlet portion to the interior of the reactor to allow a steam reforming reaction to take place;

    allowing the absorbent to absorb carbon dioxide generated with hydrogen at the steam reforming reaction; and

    releasing the carbon dioxide from the absorbent after the carbon dioxide absorption capacity of the absorbent is degraded;

    wherein temperature in an inside of the reactor is set to 625°

    C. or more at the release of the carbon dioxide, and an inert gas or a mixed inert gas containing not more than 5% by volume of carbon dioxide is employed as a treatment gas and fed via the discharge portion to the interior of the reactor in a manner that the direction of flow of the treatment gas is opposite to the feeding direction of the feedstock gas and the steam.

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