Coal-fired power stations under oxyfuel combustion produce a raw CO 2 product which contains impurities such as water, oxygen, nitrogen and argon from excess oxygen and air leakages. There are also acid gases present, such as SO 3 , SO 2 , HCl and NO X produced as by-products of combustion. These acidic impurities will need to be removed from the CO 2 stream before it is introduced into the pipeline to prevent corrosion and comply with possible regulations. There may also be stringent

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... ts on purity, particularly for applications such as enhanced oil recovery. A novel compression method of producing NO x -free, SO 2free CO 2 was proposed in where SO 2 and NO x are removed as H 2 SO 4 and HNO 3 respectively by compression and water contact of the flue gas. At GHGT-9, initial experimental results were presented using actual fluegas via a sidestream from Doosan Babcock's 160 kW coal-fired oxyfuel rig, showing the feasibility of the process eliminating 99% SO x and 90% NO x compounds. In this paper, we report on the effects of pressure, temperature, residence time and presence of water in a laboratory scale apparatus using synthetic flue gas.