This paper assesses performances and economic viability of removal by chemical absorption from the flue gases of natural gas-fired Combined Cycles, more specifically for two configurations: one where is removed ahead of the stack without modifying the power cycle; the other where part of the flue gases is recirculated to the gas turbine, thereby reducing the flow to be treated by chemical absorption. In both cases sequestered is made available at conditions suitable to storage into deep oceanic waters. Performances and cost of electricity are evaluated for systems based on large, heavy-duty turbines representative of state-of-the-art “FA” technology. Carbon sequestration reduces net plant efficiency and power output by about 10 percent and increases the cost of electricity from 36 to about 50 mills/kWh. Flue gas recirculation warrants slightly higher efficiencies and lower costs. removal is eventually compared with other strategies for the reduction of emissions, like switching existing coal-fired steam plants to natural gas or replacing existing steam plants with conventional CCs. At current fuel prices the latter appears the option of choice, with a cost of about $25 per tonn of avoided emission. [S0742-4795(00)02803-9]
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July 2000
Technical Papers
Natural Gas Fired Combined Cycles With Low Emissions
Paolo Chiesa,
e-mail: pchiesa@clausius.energ.polimi.it
Paolo Chiesa
Dipartimento di Energetica, Politecnico di Milano, P.zza Leonardo da Vinci, 32, 20133 Milan, Italy
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Stefano Consonni
e-mail: stefcons@axp7000.cdc.polimi.it
Stefano Consonni
Dipartimento di Energetica, Politecnico di Milano, P.zza Leonardo da Vinci, 32, 20133 Milan, Italy
Search for other works by this author on:
Paolo Chiesa
Dipartimento di Energetica, Politecnico di Milano, P.zza Leonardo da Vinci, 32, 20133 Milan, Italy
e-mail: pchiesa@clausius.energ.polimi.it
Stefano Consonni
Dipartimento di Energetica, Politecnico di Milano, P.zza Leonardo da Vinci, 32, 20133 Milan, Italy
e-mail: stefcons@axp7000.cdc.polimi.it
Contributed by the International Gas Turbine Institute (IGTI) of THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS for publication in the ASME JOURNAL OF ENGINEERING FOR GAS TURBINES AND POWER. Paper presented at the International Gas Turbine and Aeroengine Congress and Exhibition, Indianapolis, IN, June 7–10, 1999; ASME Paper 99-GT-370. Manuscript received by IGTI March 9, 1999; final revision received by the ASME Headquarters May 15, 2000. Associate Technical Editor: D. Wisler.
J. Eng. Gas Turbines Power. Jul 2000, 122(3): 429-436 (8 pages)
Published Online: May 15, 2000
Article history
Received:
March 9, 1999
Revised:
May 15, 2000
Citation
Chiesa, P., and Consonni, S. (May 15, 2000). "Natural Gas Fired Combined Cycles With Low Emissions ." ASME. J. Eng. Gas Turbines Power. July 2000; 122(3): 429–436. https://doi.org/10.1115/1.1287496
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