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Wichterlová, Jana; Roubíček, Václav; Pánek, Petr (2008)
Publisher: Česká společnost chemická
Languages: Czech
Types: Article
Subjects: emise CO2, separace CO2
Carbon dioxide capture and storage (CCS) is considered as one of the options for reducing CO2 emissions. CCS can be applied to large point sources of CO2, such as power plants and in large industrial processes. The CO2 capture is to produce a concentrated stream of high-pressure CO2. The capture systems typically employ absorption of CO2 from flue gases with CO2 concentration up to 15 %. The oxygen-fuel systems use oxygen instead of air for fuel combustion to produce mainly water vapour and CO2 (more than 80 %); the water vapour is easily removed by cooling. In precombustion capture, the fuel is converted to CO2 (15 - 60 %) and H2 at high pressure; then CO2 is separated by adsorption or absorption. The emerging capture technologies require development of large-scale membrane separation processes, novel absorption solvents and sorbents, membrane-absorbent systems, high-temperature oxygen transport membranes for oxygen production, oxyfuelling via chemical looping, combined reaction/separation systems and new high-temperature materials.
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