Method and apparatus for the removal of carbon dioxide from a gas stream
First Claim
1. A method for removing at least a portion of carbon dioxide in a gas stream from a coal-fired boiler, comprising:
- contacting a gas stream from a coal-fired boiler comprising carbon dioxide with an alkaline liquid stream;
absorbing at least a portion of the carbon dioxide into the alkaline liquid stream to produce absorbed carbon dioxide; and
catalyzing a liquid phase reaction of the absorbed carbon dioxide to form bicarbonate and carbonate with a catalyst, wherein the alkaline liquid stream comprises the catalyst and wherein the catalyst comprises an aldehyde.
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Abstract
The invention provides methods and apparatuses for removing carbon dioxide from a gas stream. In particular, the invention provides methods and apparatuses for absorbing carbon dioxide from a coal-fired boiler flue gas stream using an absorbing solution and for regeneration of an alkaline component used in the absorbing solution. In one embodiment, the invention provides a method for removing carbon dioxide from a gas stream by contacting a gas stream containing carbon dioxide with an alkaline liquid stream; absorbing at least a portion of the carbon dioxide into the alkaline liquid stream to produce absorbed carbon dioxide; and catalyzing a reaction of the: absorbed carbon dioxide to a form of carbonate.
74 Citations
4 Claims
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1. A method for removing at least a portion of carbon dioxide in a gas stream from a coal-fired boiler, comprising:
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contacting a gas stream from a coal-fired boiler comprising carbon dioxide with an alkaline liquid stream; absorbing at least a portion of the carbon dioxide into the alkaline liquid stream to produce absorbed carbon dioxide; and catalyzing a liquid phase reaction of the absorbed carbon dioxide to form bicarbonate and carbonate with a catalyst, wherein the alkaline liquid stream comprises the catalyst and wherein the catalyst comprises an aldehyde. - View Dependent Claims (3)
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2. A method for removing at least a portion of carbon dioxide in a gas stream, comprising:
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contacting a gas stream comprising carbon dioxide with an alkaline liquid stream; absorbing at least a portion of the carbon dioxide into the alkaline liquid stream to produce absorbed carbon dioxide; and catalyzing a liquid phase reaction of the absorbed carbon dioxide to form bicarbonate and carbonate using a catalyst, wherein the catalyst comprises an aldehyde. - View Dependent Claims (4)
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Specification