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US 6,655,150 B1Granted
Method for removing and recovering CO2 from exhaust gas
AssigneeNorsk Hydro ASA
InventorsKnut Ingvar Åsen, Dag Arne Eimer
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AssigneeNorsk Hydro ASA
InventorsKnut Ingvar Åsen, Dag Arne Eimer
Estimating the term…
The present invention relates to a method for removing and recovering CO2 from exhaust gas from a power and/or heat generating plant (a main power plant) by chemical absorption and desorption respectively, where the exhaust gas is fed to an absorber using a chemical absorbent where the CO2 is absorbed in said absorbent and a CO2-depleted exhaust gas stream is formed. The CO2 rich absorbent is further fed to a desorber where CO2 is removed from the absorbent, and the absorbent essentially free of CO2 is recirculated to the absorber and desorbed CO2 gas is discharged off. The exhaust gas is cooled and recompressed to an elevated pressure, in a compressor in a secondary power plant integrated with the main power plant, said absorber, and said desorber, before entering the absorber. The CO2-depleted exhaust gas emerging from the absorber is reheated and further expanded in an expander in said secondary power plant.
A method for removing and recovering CO2 from exhaust gas from a power and/or heat generating plant (a main power plant) by chemical absorption and desorption respectively, where the exhaust gas is fed to an absorber containing a chemical absorbent where the CO2 is absorbed in said absorbent and a CO2-depleted exhaust gas stream is formed, and the CO2 rich absorbent is further fed to a desorber where CO2 is removed from the absorbent, and the absorbent essentially free of CO2 is recirculated to the absorber and the desorbed CO2 gas is discharged off, characterised in that the exhaust gas is cooled and recompressed to an elevated pressure, in a compressor in a secondary power plant integrated with the main power plant, said absorber and said desorber, before entering the absorber, and that the CO2-depleted exhaust gas emerging from the absorber is reheated and further expanded in an expander in said secondary power plant.
Dependencies are inferred from the claim text.