| 摘要 |
The invention relates to a method for decarbonisation of metal carbonate MeCO 3 comprising into metal oxide MeO and carbon dioxide CO 2 : fluidizing MeCO 3 in a fluidized bed reactor using CO 2 rich exhaust gas stream from an oxy combustion process to produce a MeO rich stream and a CO 2 rich stream; heating the MeCO 3 to a temperature for decarbonisation of the metal carbonate MeCO 3 into metal oxide MeO and carbon dioxide CO 2 ; wherein the temperature is corresponding to the equilibrium pressure of carbon dioxide CO 2 ; providing residence time for said metal carbonate MeC03 required for said decarbonisation into calcium oxide and carbon dioxide; adjusting the partial pressure of carbon dioxide; transporting a metal carbonate MeCO 3 stream to the fluidized bed reactor for decarbonisation by a circulating fluidized bed (CFB); and separating carbon dioxide CO 2 from the metal carbonate MeCO 3 stream to form metal carbonate MeCO 3 rich stream before its decarbonisation in the fluidized bed reactor. The invention relates also to a system 1 for decarbonisation of metal carbonates into metal oxides and carbon dioxide. |
