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Exergetic Analysis of a Natural Gas Combined-Cycle Power Plant with a Molten Carbonate Fuel Cell for Carbon Capture

Author

Listed:
  • Alberto Fichera

    (Department of Electrical, Electronics and Computer Engineering, University of Catania, Viale Andrea Doria 25, 95125 Catania, Italy)

  • Samiran Samanta

    (School of Mechanical Engineering, Kalinga Institute of Industrial Technology, Deemed to be University, Bhubaneswar 751024, Odisha, India)

  • Rosaria Volpe

    (Department of Electrical, Electronics and Computer Engineering, University of Catania, Viale Andrea Doria 25, 95125 Catania, Italy)

Abstract

This study aims to propose the repowering of an existing Italian natural-gas fired combined cycle power plant through the integration of Molten Carbonate Fuel Cells (MCFC) downstream of the gas turbine for CO 2 capture and to pursuit an exergetic analysis of the two schemes. The flue gases of the turbine are used to feed the cathode of the MCFC, where CO 2 is captured and transported to the anode while generating electric power. The retrofitted plant produces 787.454 MW, in particular, 435.29 MW from the gas turbine, 248.9 MW from the steam cycle, and 135.283 MW from the MCFC. Around 42.4% of the exergy destruction has been obtained, the majority belonging to the combustion chamber and, in minor percentages, to the gas turbine and the MCFC. The overall net plant efficiency and net exergy efficiency are estimated to be around 55.34 and 53.34%, respectively. Finally, the specific CO 2 emission is around 66.67 kg/MWh, with around 2 million tons of carbon dioxide sequestrated.

Suggested Citation

  • Alberto Fichera & Samiran Samanta & Rosaria Volpe, 2022. "Exergetic Analysis of a Natural Gas Combined-Cycle Power Plant with a Molten Carbonate Fuel Cell for Carbon Capture," Sustainability, MDPI, vol. 14(1), pages 1-16, January.
    • Handle: RePEc:gam:jsusta:v:14:y:2022:i:1:p:533-:d:717793
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    References listed on IDEAS

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    1. Campanari, S. & Chiesa, P. & Manzolini, G. & Bedogni, S., 2014. "Economic analysis of CO2 capture from natural gas combined cycles using Molten Carbonate Fuel Cells," Applied Energy, Elsevier, vol. 130(C), pages 562-573.
    2. Manuele Gatti & Emanuele Martelli & Daniele Di Bona & Marco Gabba & Roberto Scaccabarozzi & Maurizio Spinelli & Federico Viganò & Stefano Consonni, 2020. "Preliminary Performance and Cost Evaluation of Four Alternative Technologies for Post-Combustion CO 2 Capture in Natural Gas-Fired Power Plants," Energies, MDPI, vol. 13(3), pages 1-32, January.
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    1. Emmanouela Leventaki & Francisco M. Baena-Moreno & Gaetano Sardina & Henrik Ström & Ebrahim Ghahramani & Shirin Naserifar & Phuoc Hoang Ho & Aleksandra M. Kozlowski & Diana Bernin, 2022. "In-Line Monitoring of Carbon Dioxide Capture with Sodium Hydroxide in a Customized 3D-Printed Reactor without Forced Mixing," Sustainability, MDPI, vol. 14(17), pages 1-13, August.

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