Method and an apparatus for performing an energy efficient desulphurization and decarbonisation of a flue gas

A closed loop desulphurization and decarbonisation apparatus, comprising:

• (a) at least one starter for starting a reaction between an electropositive metal and sulphur oxides and carbon dioxide of a flue gas;
• (b) a first reaction chamber comprising cooling means for reducing the sulphur oxides and the carbon dioxide of said flue gas in an exothermic reaction with the electropositive metal;
• (c) a second reaction chamber for generating a first suspension comprising suspended carbon containing reaction products and sulphur containing reaction products by extracting solid reaction products of the first reaction chamber in a solvent;
• (d) a third reaction chamber for oxidizing the first suspension to generate a second suspension comprising suspended carbon containing reaction products and oxidized sulphur containing reaction products;
• (e) at least one separator for separating the oxidized sulphur containing reaction products from the suspended carbon containing reaction products;
• and
• (f) at least one regeneration unit for regenerating the electropositive metal from the separated suspended carbon containing reaction products and/or from the separated oxidized sulphur containing reaction products.