PROCESS FOR THE REMOVAL OF CARBON DIOXIDE FROM A GAS

Process for the removal of CO2 from a gas comprising CO2, comprising the steps of: (a) contacting the gas in an absorber (102) with an aqueous solution of one or more carbonate compounds in the presence of an accelerator, thereby reacting at least part of the CO2 to form a bicarbonate compound, under conditions such that at least a part of the bicarbonate compound formed precipitates, forming a bicarbonate slurry; (b) subjecting at least part of the bicarbonate slurry to a concentration step (105) to obtain the aqueous solution and a concentrated bicarbonate slurry, wherein the concentrated bicarbonate slurry comprises in the range of from 10 to 60 wt % of bicarbonate compounds; (c) returning at least part of the aqueous solution to the absorber; (d) transferring a first part of the concentrated bicarbonate slurry to a first heat exchanger (110a), wherein the first part of the slurry is being heated against a hot lean solvent of a regenerator (112); (e) transferring a second part of the concentrated bicarbonate slurry to a second heat exchanger (110b), wherein the second part of the slurry is being heated against a second heating source, which second heating source differs from the hot lean solvent of the regenerator; (f) transferring the heated first part and the heated second part of the concentrated bicarbonate slurry to the regenerator (112) and heating concentrated bicarbonate slurry to obtain a CO2-rich gas stream and a regenerated carbonate stream; and (g) returning the regenerated carbonate stream to the absorber (102) of step (a).