Purification of oxyfuel-derived CO2 |
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| Authors: | Vince White Laura Torrente-Murciano David Sturgeon David Chadwick |
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| Institution: | 1. Air Products PLC, Hersham Place, Molesey Road, Walton-on-Thames, Surrey, KT12 4RZ, UK;2. Chemical Engineering Department, Imperial College London, London, SW7 2AZ, UK;3. Doosan Babcock Energy Limited, Porterfield Road, Renfrew, PA4 8DJ, UK;2. Politecnico di Milano – Department of Energy, Via Lambruschini, 4, 20156 Milano, Italy;3. TNO, Netherlands Organisation for Applied Scientific Research, Department of Gas Treatment, Leeghwaterstraat 46, 2628 CA Delft, The Netherlands;1. SSCP DTP, Grantham Institute for Climate Change and the Environment, Imperial College London, SW7 2AZ, UK;2. Centre for Environmental Policy, Imperial College London, SW7 1NA, UK;3. Centre for Process Systems Engineering, Imperial College London, SW7 2AZ, UK;4. Department of Earth Science and Engineering, Imperial College London, SW7 2AZ, UK;1. Chemical Engineering Department, University of Newcastle, Australia;2. Callide Oxyfuel Project, Australia |
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| Abstract: | Oxyfuel combustion in a pulverised fuel coal-fired power station produces a raw CO2 product containing contaminants such as water vapour plus oxygen, nitrogen and argon derived from the excess oxygen for combustion, impurities in the oxygen used, and any air leakage into the system. There are also acid gases present, such as SO3, SO2, HCl and NOx produced as byproducts of combustion. At GHGT8 (White and Allam, 2006) we presented reactions that gave a path-way for SO2 to be removed as H2SO4 and NO and NO2 to be removed as HNO3. In this paper we present initial results from the OxyCoal-UK project in which these reactions are being studied experimentally to provide the important reaction kinetic information that is so far missing from the literature. This experimental work is being carried out at Imperial College London with synthetic flue gas and then using actual flue gas via a sidestream at Doosan Babcock's 160 kW coal-fired oxyfuel rig. The results produced support the theory that SOx and NOx components can be removed during compression of raw oxyfuel-derived CO2 and therefore, for emissions control and CO2 product purity, traditional FGD and deNOx systems should not be required in an oxyfuel-fired coal power plant. |
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