| 摘要 |
<p>THE INVENTION PROVIDES A PROCESS FOR THE REMOVAL OF CO2 FROM A GAS COMPRISING CO2, THE PROCESS COMPRISING THE STEPS OF: (A) CONTACTING THE GAS IN AN ABSORBER 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, WHEREIN THE ABSORBER IS OPERATED 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 TO OBTAIN AN AQUEOUS SOLUTION AND A CONCENTRATED BICARBONATE SLURRY, WHEREIN THE CONCENTRATED BICARBONATE SLURRY COMPRISES IN THE RANGE OF FROM 20 TO 80 WT% OF BICARBONATE COMPOUNDS; (C) RETURNING AT LEAST PART OF THE AQUEOUS SOLUTION TO THE ABSORBER; (D) PRESSURISING THE CONCENTRATED BICARBONATE SLURRY, TO OBTAIN A PRESSURISED CONCENTRATED BICARBONATE SLURRY; (E) TRANSFERRING THE PRESSURISED CONCENTRATED BICARBONATE SLURRY TO A REGENERATOR SYSTEM AND APPLYING HEAT TO LIBERATE CO2 FROM THE CONCENTRATED CARBONATE SLURRY TO OBTAIN A CO2-RICH GAS STREAM AND A REGENERATED CARBONATE STREAM.</p> |
