SOFC-based hybrid cycle integrated with a coal gasification plant

Matteo C. Romano, Stefano Campanari, Vincenzo Spallina, Giovanni Lozza

    Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review


    Application of large scale high temperature fuel cells on syngas fuel produced from coal would be a turning point in the power generation sector, dramatically improving the efficiency and the environmental performance of coal-fired power plants. The purpose of this study is the assessment of a system constituted by a SOFC-based hybrid cycle integrated with a coal gasification process. In this system, syngas produced in a high efficiency, dry feed, oxygen blown, entrained flow Shell gasifier is cooled, depurated from particulate and sulfur compounds and reheated; the clean syngas feeds a pressurized SOFC together with high pressure air generated by the compressor of a gas turbine. After combustion of unconverted syngas, fuel cell exhausts are expanded and cooled, providing heat to a bottoming steam cycle for an efficient energy recovery. A high integration between gasification and power islands is necessary in order to obtain an elevated efficiency: the heat recovery system from syngas cooling is carefully arranged to provide thermal power for clean syngas reheating, air preheating and steam generation. The paper presents a preliminary analysis of literature results and a discussion of the thermodynamic implications arising from the use of different primary fuels in a fuel cell-gas turbine cycle. Then the work presents a detailed thermodynamic analysis of the proposed IGFC layout, assessing the effect of SOFC operating pressure on power balance and net plant efficiency. A sensitivity analysis on the variation of fuel and air utilization in the fuel cell is also performed. Results show that the present innovative SOFC-based power system may achieve an efficiency gain of 7-11 percentage points, with respect to an advanced IGCC based on state of the art technology.

    Original languageEnglish
    Title of host publicationProceedings of the ASME Turbo Expo 2009
    Subtitle of host publicationPower for Land, Sea and Air
    Number of pages10
    Publication statusPublished - 2009
    Event2009 ASME Turbo Expo - Orlando, FL, United States
    Duration: 8 Jun 200912 Jun 2009


    Conference2009 ASME Turbo Expo
    Country/TerritoryUnited States
    CityOrlando, FL


    • Coal
    • Solid oxide fuel cells
    • Cycles
    • Fuel gasification
    • Industrial plants


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