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The performance of post-combustion CO2 capture processes depends on the applied solvent as well as on the chosen process configuration and the integration concept with the power plant. Siemens bases its development efforts on an amino-acid salt solution as solvent, which has a negligible environmental impact and provides favourable properties for a low-energy capture process. The solvent features a high chemical and thermal stability and is easy to handle. The capture process is characterized by near-zero emissions.As a first step for validation of the determined solvent and process features on an industrial scale, the implementation of the capture process in a pilot plant is required. For this purpose, Siemens has installed a pilot plant at E.ON’s coal-fired power plant Staudinger in Germany and started the operation in August 2009.The measured pilot plant process data are used to validate the computational process model, which refines the model accuracy and improves the reliability in terms of plant performance. The findings from pilot plant operation confirmed that an overall net plant efficiency penalty of less than six percentage points (without CO2 compression) for a state-of-the-art coal-fired steam power plant can be achieved.The paper also presents experiences from pilot plant measuring campaigns with regard to the impact of trace components such as SOx and NOx. Solvent losses due to related degradation effects can be minimized by an intelligent reclaiming concept. Loss due to oxygen degradation can be estimated to be less than one percent of hold-up per year. Suitable construction materials have been qualified.The results of the pilot plant operation will serve as basis for the implementation of a demonstration plant, which will be the final step before a full-scale commercial carbon capture plant project. Siemens has been selected as technology provider for the Meri-Pori Carbon Capture and Storage project in Finland, which is a potential funding candidate of the European Flagship Programme. The Meri-Pori power plant has an installed capacity of 565 MW and the capture demonstration project is supposed to treat half of the power plant’s flue gas and to capture 90% CO2 from the treated flue gas. In addition to the Siemens capture process, the demonstration project will include ship transportation and geological storage

energy procedia

Towards commercial application of a second-generation post-combustion capture technology — Pilot plant validation of the siemens capture process and implementation of a first demonstration case