Carbon Dioxide → Carbon Dioxide

Participants

Reaction Steps

In another aspect, the present invention provides a process for reducing the amount of carbon dioxide in a carbon dioxide-containing gas stream. The process includes introducing the carbon dioxide-containing gas stream and a carbonate-containing solution into a chamber; contacting the carbon dioxide-containing gas stream and the carbonate-containing solution in the chamber such that at least a portion of carbon dioxide from the carbon dioxide-containing gas stream is absorbed in the carbonate-containing solution; converting at least a portion of the carbon dioxide and the carbonate in the carbonate-containing solution to bicarbonate to produce a carbon dioxide-, bicarbonate-, carbonate-containing solution; transferring at least a portion of heat from the carbon dioxide-, bicarbonate-, carbonate-containing solution exiting the chamber to the carbonate-containing solution such that the temperature of the chamber is from about 50° C. to about 90° C.; precipitating a bicarbonate-containing solid out of the carbon dioxide-, bicarbonate-, carbonate-containing solution; concentrating the bicarbonate-containing solid to a bicarbonate-containing slurry; and stripping the bicarbonate-containing slurry to produce a carbon dioxide product.

Provenance & Evidence