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Investigation of the Formation of Coherent Ash Residues during Fluidized Bed Gasification of Wheat Straw Lignin

Author

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  • Juraj Priscak

    (BEST—Bioenergy and Sustainable Technologies GmbH, Inffeldgasse 21b, A-8010 Graz, Austria
    Institute of Chemical, Environmental and Bioscience Engineering (ICEBE), Technische Universität Wien, Getreidemarkt 9/166, 1060 Vienna, Austria)

  • Katharina Fürsatz

    (BEST—Bioenergy and Sustainable Technologies GmbH, Inffeldgasse 21b, A-8010 Graz, Austria
    Institute of Chemical, Environmental and Bioscience Engineering (ICEBE), Technische Universität Wien, Getreidemarkt 9/166, 1060 Vienna, Austria)

  • Matthias Kuba

    (BEST—Bioenergy and Sustainable Technologies GmbH, Inffeldgasse 21b, A-8010 Graz, Austria
    Institute of Chemical, Environmental and Bioscience Engineering (ICEBE), Technische Universität Wien, Getreidemarkt 9/166, 1060 Vienna, Austria)

  • Nils Skoglund

    (BEST—Bioenergy and Sustainable Technologies GmbH, Inffeldgasse 21b, A-8010 Graz, Austria
    Institute of Chemical, Environmental and Bioscience Engineering (ICEBE), Technische Universität Wien, Getreidemarkt 9/166, 1060 Vienna, Austria
    Thermochemical Energy Conversion Laboratory, Umeå University, 901 87 Umeå, Sweden)

  • Florian Benedikt

    (Institute of Chemical, Environmental and Bioscience Engineering (ICEBE), Technische Universität Wien, Getreidemarkt 9/166, 1060 Vienna, Austria)

  • Hermann Hofbauer

    (Institute of Chemical, Environmental and Bioscience Engineering (ICEBE), Technische Universität Wien, Getreidemarkt 9/166, 1060 Vienna, Austria)

Abstract

Thermal conversion of ash-rich fuels in fluidized bed systems is often associated with extensive operation problems caused by the high amount of reactive inorganics. This paper investigates the behavior of wheat straw lignin—a potential renewable fuel for dual fluidized bed gasification. The formation of coherent ash residues and its impact on the operation performance has been investigated and was supported by thermochemical equilibrium calculations in FactSage 7.3. The formation of those ash residues, and their subsequent accumulation on the surface of the fluidized bed, causes temperature and pressure fluctuations, which negatively influence the steady-state operation of the fluidized bed process. This paper presents a detailed characterization of the coherent ash residues, which consists mostly of silica and partially molten alkali silicates. Furthermore, the paper gives insights into the formation of these ash residues, dependent on the fuel pretreatment (pelletizing) of the wheat straw lignin, which increases their stability compared to the utilization of non-pelletized fuel.

Suggested Citation

  • Juraj Priscak & Katharina Fürsatz & Matthias Kuba & Nils Skoglund & Florian Benedikt & Hermann Hofbauer, 2020. "Investigation of the Formation of Coherent Ash Residues during Fluidized Bed Gasification of Wheat Straw Lignin," Energies, MDPI, vol. 13(15), pages 1-16, August.
    • Handle: RePEc:gam:jeners:v:13:y:2020:i:15:p:3935-:d:393133
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    References listed on IDEAS

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    Cited by:

    1. Tomasz Jóźwiak & Urszula Filipkowska & Paulina Walczak, 2022. "The Use of Aminated Wheat Straw for Reactive Black 5 Dye Removal from Aqueous Solutions as a Potential Method of Biomass Valorization," Energies, MDPI, vol. 15(17), pages 1-19, August.
    2. Fürsatz, K. & Fuchs, J. & Benedikt, F. & Kuba, M. & Hofbauer, H., 2021. "Effect of biomass fuel ash and bed material on the product gas composition in DFB steam gasification," Energy, Elsevier, vol. 219(C).

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