Patent ID: 8580206

Claim:
Apparatus for the removal of one or more contaminants selected from the group consisting of SO 2 and NO x from gaseous carbon dioxide, said apparatus comprising: an oxyfuel boiler for producing steam for power generation, and gaseous carbon dioxide; a compressor capable of elevating the pressure of gaseous carbon dioxide from said oxyfuel boiler to at least 3 bar; at least one counter current gas/liquid contact device for washing said gaseous carbon dioxide with water at elevated pressure in the presence of molecular oxygen and, when SO 2 is to be removed, NO x , for a sufficient time to convert SO 2 to sulfuric acid and/or NO x to nitric acid; conduit means for feeding gaseous carbon dioxide at elevated pressure from said compressor to the or each respective gas/liquid contact device; and conduit means for recycling aqueous sulfuric acid solution and/or aqueous nitric acid solution to the or each respective gas/liquid contact device, wherein said at least one counter current gas/liquid contact device comprises at least one packed section.