Carbon Dioxide → Carbon Dioxide

In still another aspect, the present invention provides a process for reducing the amount of carbon dioxide in a flue gas stream which is generated from a fossil fuel combustion system. The process includes introducing the flue gas stream and a carbonate-containing solution into an absorption column; contacting the flue gas stream with the carbonate-containing solution in the absorption column; reacting carbon dioxide in the flue gas stream with carbonate in the carbonate-containing solution 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 in a separating chamber a bicarbonate-containing solid out of the carbon dioxide-, bicarbonate-, carbonate-containing solution, wherein the separating chamber includes a carbon dioxide-, bicarbonate-, carbonate-containing solvent that has a solubility of bicarbonate in water that is less than the solubility in water of the carbon dioxide-, bicarbonate-, carbonate-containing solution in the absorption column; concentrating the bicarbonate-containing solid to form a bicarbonate-containing slurry; stripping the bicarbonate-containing slurry in a pressurized stripping column to produce a carbon dioxide product, wherein the stripping column has a pressure in the range of from 5 to 60 bar.

1. customIn still another aspect, the present invention provides a process
2. additionThe process includes introducing the flue gas stream
3. custominto an absorption column
4. additioncontaining solution
5. customin the absorption column
6. additionreacting carbon dioxide in the flue gas stream with carbonate in the carbonate-containing solution

ORD record

ord-8c8db5c6045f433d91d34ce5b2bc82d3

Source dataset

uspto-grants-2013_08

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US08512445B2