COMBUSTION METHOD WITH INTEGRATED CO<SB>2</SB> SEPARATION BY MEANS OF CARBONATION

摘要

The invention relates to a method of separating CO2 from flue gases, which c an be used at areas with large emissions (thermal power stations using any carbonaceous fuel). The separated CO2 stream can be used and/or contained in geological formations. The inventive method aims to reduce the high costs involved in CO2 separation which prevent large-scale use of the CO2 containment options outlined in the UN's IPCC reports. Said method consists in bringing flue gases into contact with a calcareous sorbent (calcined dolomit e, limestone) at 650-750 ~C, thereby producing the CO2 capture reaction by mean s of the rapid carbonation of the sorbent. The sorbent is regenerated in anoth er reactor (calciner) which operates in CO2 or CO2/H2O atmospheres and at a pressure equal to or less than atmospheric pressure.