AN ENERGY EFFICIENT PROCESS FOR REMOVING AND SEQUESTERING CO2 FROM ENERGY PROCESS PLANTS EXHAUST GAS

摘要

The present invention relates to an energy efficient process for removing and sequestering CO2 from energy process plants exhaust gas by chemical absorption and desorption respectively, where said 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, where said discharged CO2 gas stream is compressed and the hot compressed stream is used directly to reboil the desorber or used to raise steam from boiler feed water which can be used as heat medium in a reboiler in said desorber.