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Dynamic Behavior of Coal-Fired Power Plants with Postcombustion CO2 Capture

Wellner, Kai, Marx-Schubach, Thomas, Schmitz, Gerhard
Industrial & Engineering Chemistry Research 2016 v.55 no.46 pp. 12038-12045
carbon, carbon dioxide, case studies, coal, engineering, models, power generation, power plants, steam
The combined operation of postcombustion CO₂ capture and a power plant is a complex process with significant mutual interactions. Although the application of CO₂ capture imposes an efficiency penalty on the power plant, it also provides the opportunity to operate the power plant in a more flexible way. To analyze this process, a detailed model of a postcombustion capture plant is developed and validated with measurement data. Afterward, the model is coupled to the model of a hard coal-fired power plant to study the effects of a joint operation. In a case study scenario, the steam extraction of the carbon capture plant is reduced by 50% to increase the power generation of the power plant. The results indicate that it is possible to provide primary frequency control by using this mode of operation.