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Oxy-Fuel Combustion of Hard Coal, Wheat Straw, and Solid Recovered Fuel in a 200 kW th Calcium Looping CFB Calciner

Author

Listed:
  • Joseba Moreno

    (University of Stuttgart, Institute of Combustion and Power Plant Technology (IFK), Pfaffenwaldring 23, 70569 Stuttgart, Germany)

  • Matthias Hornberger

    (University of Stuttgart, Institute of Combustion and Power Plant Technology (IFK), Pfaffenwaldring 23, 70569 Stuttgart, Germany)

  • Max Schmid

    (University of Stuttgart, Institute of Combustion and Power Plant Technology (IFK), Pfaffenwaldring 23, 70569 Stuttgart, Germany)

  • Günter Scheffknecht

    (University of Stuttgart, Institute of Combustion and Power Plant Technology (IFK), Pfaffenwaldring 23, 70569 Stuttgart, Germany)

Abstract

The fluidized bed combustion (FBC) of biomass and solid recovered fuel (SRF) is globally emerging as a viable solution to achieve net-negative carbon emissions in the heat and power sector. Contrary to conventional fossil fuels, alternative fuels are highly heterogeneous, and usually contain increased amounts of alkaline metals and chlorine. Hence, experimental studies are mandatory in order to thoroughly characterize the combustion behavior and pollutant formation of non-conventional fuels in novel applications. This work gives an overview of experimental investigations on the oxy-fuel combustion of hard coal, wheat straw, and SRF with a limestone bed in a semi-industrial circulating fluidized bed (CFB) pilot plant. The CFB combustor was able to be operated under different fuel blending ratios and inlet O 2 concentrations, showing a stable hydrodynamic behavior over many hours of continuous operation. The boundary conditions introduced in this study are expected to prevail in carbon capture and storage (CCS) processes, such as the oxy-fuel combustion in the CFB calciner of a Calcium Looping (CaL) cycle for post-combustion CO 2 capture.

Suggested Citation

  • Joseba Moreno & Matthias Hornberger & Max Schmid & Günter Scheffknecht, 2021. "Oxy-Fuel Combustion of Hard Coal, Wheat Straw, and Solid Recovered Fuel in a 200 kW th Calcium Looping CFB Calciner," Energies, MDPI, vol. 14(8), pages 1-17, April.
    • Handle: RePEc:gam:jeners:v:14:y:2021:i:8:p:2162-:d:535226
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    References listed on IDEAS

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    1. Riaza, J. & Gil, M.V. & Álvarez, L. & Pevida, C. & Pis, J.J. & Rubiera, F., 2012. "Oxy-fuel combustion of coal and biomass blends," Energy, Elsevier, vol. 41(1), pages 429-435.
    2. Lupiáñez, Carlos & Carmen Mayoral, M. & Díez, Luis I. & Pueyo, Eloy & Espatolero, Sergio & Manuel Andrés, J., 2016. "The role of limestone during fluidized bed oxy-combustion of coal and biomass," Applied Energy, Elsevier, vol. 184(C), pages 670-680.
    3. Pang, Lei & Shao, Yingjuan & Zhong, Wenqi & Gong, Zheng & Liu, Hao, 2020. "Experimental study of NOx emissions in a 30 kWth pressurized oxy-coal fluidized bed combustor," Energy, Elsevier, vol. 194(C).
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    Cited by:

    1. Monika Kosowska-Golachowska & Adam Luckos & Tomasz Czakiert, 2022. "Composition of Flue Gases during Oxy-Combustion of Energy Crops in a Circulating Fluidized Bed," Energies, MDPI, vol. 15(19), pages 1-13, September.

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