This paper describes a gas turbine combined cycle (GTCC) power plant system, which addresses the three key design challenges of postcombustion CO2 capture from the stack gas of a GTCC power plant using aqueous amine-based scrubbing method by offering the following: (i) low heat recovery steam generator (HRSG) stack gas temperature, (ii) increased HRSG stack gas CO2 content, and (iii) decreased HRSG stack gas O2 content. This is achieved by combining two bottoming cycle modifications in an inventive manner, i.e., (i) high supplementary (duct) firing in the HRSG and (ii) recirculation of the HRSG stack gas. It is shown that, compared to an existing natural gas-fired GTCC power plant with postcombustion capture, it is possible to reduce the CO2 capture penalty—power diverted away from generation—by almost 65% and the overall capital cost ($/kW) by about 35%.
Gas Turbine Combined Cycle Optimized for Postcombustion Carbon Capture
Reston, VA 20190
London EC4V 6RN, UK
Contributed by the IC Engine Division of ASME for publication in the JOURNAL OF ENGINEERING FOR GAS TURBINES AND POWER. Manuscript received November 20, 2017; final manuscript received January 10, 2018; published online May 24, 2018. Editor: David Wisler.
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Can Gülen, S., and Hall, C. (May 24, 2018). "Gas Turbine Combined Cycle Optimized for Postcombustion Carbon Capture." ASME. J. Eng. Gas Turbines Power. September 2018; 140(9): 091701. https://doi.org/10.1115/1.4039733
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