CARBON DIOXIDE ISOLATING DEVICE AND METHOD
First Claim
1. An apparatus for separating carbon dioxide, the apparatus comprising:
- an absorption column in which carbon dioxide in off-gas is allowed to react with an absorbent solution so as to strip the carbon dioxide from the off-gas;
a regeneration column in which the carbon dioxide is removed from the absorbent solution to regenerate the absorbent solution; and
an ion-exchange column comprising a chamber having a cathode chamber space that receives the absorbent solution from the absorption column and an anode chamber space that receives the absorbent solution from the regeneration column, the ion-exchange column further comprising a permeable membrane that divides the chamber into the cathode chamber space and the anode chamber space.
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Accused Products
Abstract
An apparatus for separating carbon dioxide is provided. The apparatus includes: an absorption column in which carbon dioxide in off-gas is allowed to react with an absorbent solution so as to strip the carbon dioxide from the off-gas; a regeneration column in which the carbon dioxide is removed from the absorbent solution to regenerate the absorbent solution; and an ion-exchange column including a chamber having a cathode chamber space that receives the absorbent solution from the absorption column and an anode chamber space that receives the absorbent solution from the regeneration column, the ion-exchange column further including a permeable membrane that divides the chamber into the cathode chamber space and the anode chamber space.
40 Citations
35 Claims
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1. An apparatus for separating carbon dioxide, the apparatus comprising:
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an absorption column in which carbon dioxide in off-gas is allowed to react with an absorbent solution so as to strip the carbon dioxide from the off-gas; a regeneration column in which the carbon dioxide is removed from the absorbent solution to regenerate the absorbent solution; and an ion-exchange column comprising a chamber having a cathode chamber space that receives the absorbent solution from the absorption column and an anode chamber space that receives the absorbent solution from the regeneration column, the ion-exchange column further comprising a permeable membrane that divides the chamber into the cathode chamber space and the anode chamber space. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method for separating carbon dioxide, the method comprising the steps of
allowing carbon dioxide in an off-gas to react with an absorbent solution so as to strip the carbon dioxide from the off-gas; -
removing the carbon dioxide from the absorbent solution to regenerate the absorbent solution; introducing the absorbent solution into an anode chamber space; introducing the absorbent solution into a cathode chamber space divided from the anode chamber space by a permeable membrane; and ion-exchanging the first absorbent solution, introduced into the anode chamber space, with the second absorbent solution introduced into the cathode chamber space, by the permeable membrane. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
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- 21. A method for separating carbon dioxide, the method comprising treating an off-gas in an absorption column in which carbon dioxide in the off-gas is allowed to react with an ammonia-containing absorbent solution so as to strip the carbon dioxide from the off-gas and in a regeneration column in which the carbon dioxide is removed from the absorbent solution to regenerate the absorbent solution, wherein cations in the absorbent solution discharged from the absorption column are ion-exchanged with anions of the absorbent solution discharged from the regeneration column, thereby reducing the concentration of carbon dioxide in the absorbent solution and increasing the concentration of ammonia in the absorbent solution.
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27. An apparatus for separating carbon dioxide, comprising:
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a chamber having a cathode chamber space provided with a cathode plate and an anode chamber space provided with an anode plate; a permeable membrane disposed between the cathode plate and the anode plate so as to divide the chamber into the cathode chamber space and the anode chamber space; and a gas scrubber which receives a gas from the chamber and scrubs the gas. - View Dependent Claims (28, 29, 30, 31, 32, 33, 34, 35)
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Specification