Publication Date:
2012-02-07
Description:
Usually the separation of CO 2 from the flue gas in power plants is connected with high efficiency losses, independent of separation technology. The reason is that the separation processes of the pre- or post-combustion capture or using an oxy-fuel process as proposed today result in additional energy consumption. But there are also sorbents, e.g., lime, that form carbonates and release heat at a temperature level of about 600 °C and will be calcinated at higher temperatures (about 900 °C). Integration of these processes in the design of a conventional power plant and production of additional power output by integration of another Rankine cycle using the separated CO 2 and steam minimizes efficiency losses. The simulation and the results of such a CO 2 capture process are described in this paper. Simulations of a coal-fired power plant with CO 2 separation were carried out to minimize efficiency losses occurring by integration of a carbonate looping process. The formed carbonate will be decomposed in a calciner in the combustion chamber. Using a CO 2 -H 2 O steam turbine to expand the formed CO 2 -H 2 O steam mixture generates additional electrical output.
Print ISSN:
0930-7516
Electronic ISSN:
1521-4125
Topics:
Chemistry and Pharmacology
,
Process Engineering, Biotechnology, Nutrition Technology
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