This paper assesses performances and economic viability of CO2 removal by chemical absorption from the flue gases of natural gas-fired Combined Cycles, more specifically for two configurations: one where CO2 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 CO2 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. CO2 removal is eventually compared with other strategies for the reduction of CO2 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 CO2 emission. [S0742-4795(00)02803-9]

1.
U.S. Department of Energy, 1993, “The Capture, Utilization and Disposal of Carbon Dioxide from Fossil Fuel-Fired Power Plants,” report prepared for U.S. Dep. of Energy, contract No. DE-FG02-92ER30194.A000, July 1993.
2.
Kohl, A., and Riesenfeld, F., 1985, Gas Purification, 4th ed., Gulf Publishing, Houston.
3.
Chiesa, P., and Lozza, G., 1998, “CO2 Emission Abatement in IGCC Power Plants by Semiclosed Cycles. Part B—With Air-Blown Combustion and CO2 Physical Absorption,” ASME Paper 98-GT-385.
4.
Chiesa, P., and Lozza, G., 1998, “CO2 Emission Abatement in IGCC Power Plants by Semiclosed Cycles Part A—With Oxygen-Blown Combustion,” ASME Paper 98-GT-384.
5.
Chiesa, P., Consonni, S., and Lozza, G., 1998, “A Comparative Analysis of IGCCs with CO2 Sequestration,” Proceedings Fourth Int. Conference on Greenhouse Gas Control Technologies, Intertaken, Switzerland, Aug. 30–Sep. 2.
6.
Pelandini, G., and Michelutti, F., 1996, “Thermodynamic Analysis of CO2 Removal Systems from Combined Cycles Flue Gases,” (in Italian) Graduation Thesis, School of Engineering of Politecnico di Milano, Milan, Italy, Academic Year 1994–95.
7.
Mathieu, P., and Nihart, R., 1998, “Zero Emission Matiant Cycle,” ASME Paper 98-GT-383.
8.
Audus, H., 1998, “CO2 Capture by Pre-Combustion Decarbonization of Natural Gas,” Proceedings Fourth Int. Conference on Greenhouse Gas Control Technologies, Interlaken, Switzerland, Aug. 30–Sep. 2.
9.
Bannister, R. L., Newby, R. A., and Wen-Ching, Y., 1998, “Final Report on the Development of a Hydrogen Fueled Combustion Turbine for Power Generation,” ASME Paper 98-GT-201.
10.
Kizuka, N., et al., 1998, “Conceptual Design of the Cooling System for 1700°C-Class Hydrogen-Fueled Combustion Gas Turbine,” ASME Paper 98-GT-345.
11.
Lozza, G., 1990, “Bottoming Steam Cycles for Combined Gas-Steam Power Plants: A Theoretical Estimation of Steam Turbine Performance and Cycle Analysis,” Proc. 1990 ASME Cogen-Turbo, New Orleans, Louisiana, pp. 83–92.
12.
Consonni, S., 1992, “Performance Prediction of Gas/Steam Cycles for Power Generation,” Ph.D. thesis, No. 1893-T, Mechanical and Aerospace Engineering Dept., Princeton University, Princeton, NJ.
13.
Chiesa, P., Consonni, S., Lozza, G., and Macchi, E., 1993, “Predicting the Ultimate Performance of Advanced Power Cycles Based on Very High Temperature Gas Turbine Engines,” ASME Paper 93-GT-223.
14.
Macchi
,
E.
,
Consonni
,
S.
,
Lozza
,
G.
, and
Chiesa
,
P.
,
1995
, “
An Assessment of the Thermodynamic Performance of Mixed Gas-Steam Cycles: Part A—Intercooled and Steam-Injected Cycles
,”
ASME J. Eng. Gas Turbines Power
,
117
, pp.
489
498
.
15.
ASPEN PLUS, 1996, release 9.3, reference manual.
16.
Miller, H. E., 1996, ““F” Technology—The First Half-Million Operating Hours,” GE Publication GER-3950.
17.
Smelser, S. C., Stock, R. M., McCleary, G. J., 1991, “Engineering and Economic Evaluation of CO2 Removal from Fossil-Fuel-Fired Power Plant,” EPRI Report IE-7365, Palo Alto, CA, USA.
18.
Hendriks, C., 1994, “Carbon Dioxide Removal from Coal-Fired Power Plants,” Ph.D. thesis, University of Utrecht, The Netherlands.
19.
Corti, A., Lombardi, L., and Manfrida, G., 1998, “Absorption of CO2 With Amines in a Semiclosed GT Cycle: Plant Performance and Operating Costs,” ASME, Paper 98-GT-395.
20.
McMullan, J. T., et al., 1995, “Techno-Economic Assessment Studies of Fossil Fuels and Fuel Woods Power Generation Technologies,” Joule II Program R&D in Clean Coal Technology, report to the European Commission, Brussels, Belgium.
21.
TAG—Technical Assessment Guide (Electric Supply), 1993, EPRI Report TR-102275 1, Rev. 7, Palo Alto (Ca), USA.
22.
Doctor, R. D., Molburg J. C., and Thimmapuram, P. R., 1996, “KRW Oxygen-Blown Gasification Combined Cycle: Carbon Dioxide Recovery, Transport and Disposal,” DOE report prepared by Energy System Division Argonne National Laboratory, August 1996.
23.
Chiesa, P., and Consonni, S., 1998, “Shift Reactors and Physical Absorption for low-CO2 Emission IGCCs,” ASME Paper 98-GT-396.
24.
Fujoka
,
Y.
, et al.
,
1997
, “
Cost Comparison in Various CO2 Ocean Disposal Options
,”
Energy Convers. Manage.
,
38
, pp.
S273–S277
S273–S277
.
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