Method and system for low energy carbon dioxide removal
AssigneeALSTOM Technology Ltd
InventorStephen Alan Bedell
Life of this patent
Estimating the term…
Abstract
A system and method for removing carbon dioxide from a gas stream. One aspect of the method includes introducing a carbon dioxide containing gas stream to an absorber; contacting the gas stream with an amine-containing solvent; absorbing, with the amine-containing solvent, the carbon dioxide from the gas stream, thereby removing the carbon dioxide from the gas stream; and forming a precipitate with the amine-containing solvent and the carbon dioxide.
Claims20
A method for removing carbon dioxide from a gas stream in a substantially isothermal absorber, the method comprising:
- introducing a carbon dioxide containing gas stream to an absorber;
- contacting the gas stream with an amine-containing solvent;
- absorbing the carbon dioxide from the gas stream with the amine-containing solvent, thereby removing the carbon dioxide from the gas stream in an exothermic reaction;
- and
- forming a precipitate with the amine-containing solvent and the carbon dioxide, the formation of the precipitate is an endothermic reaction such that the endothermicity of the reaction reduces the exothermicity of the absorption of the carbon dioxide.
A method for regulating an amount of heat generated in an absorber, the method comprising:
- introducing a carbon dioxide containing gas stream to an absorber;
- contacting the carbon dioxide containing gas stream with an amine-containing solvent, thereby removing carbon dioxide from the gas stream and forming a precipitate between the carbon dioxide and the amine-containing solvent;
- and
- adjusting the degree of precipitation formation by at least one of decreasing a temperature of the absorber, combining a co-solvent with the amine-containing solvent, or increasing a concentration of carbon dioxide present in the absorber, wherein the degree of precipitation formation regulates an amount of heat generated in the absorber.
A system for removing carbon dioxide from a gas stream, the system comprising:
- an absorber configured to receive a carbon dioxide containing gas stream and an amine-containing solvent, wherein the carbon dioxide containing gas stream and the amine-containing solvent are contacted to remove carbon dioxide from the gas stream in an exothermic reaction and form a precipitate in an endothermic reaction, the endothermic reaction having an endothermicity that reduces the exothermicity of the removal of the carbon dioxide;
- and
- a regenerator fluidly coupled to the absorber, wherein the regenerator is configured to receive at least a portion of the precipitate and remove carbon dioxide therefrom to form a regenerated solvent to be introduced to the absorber for further absorption and removal of carbon dioxide.
Dependencies are inferred from the claim text.