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Performance of Corn Cob Combustion in a Low-Temperature Fluidized Bed

Author

Listed:
  • Rolandas Paulauskas

    (Laboratory of Combustion Processes, Lithuanian Energy Institute, Breslaujos Str. 3, LT-44403 Kaunas, Lithuania)

  • Marius Praspaliauskas

    (Laboratory of Heat-Equipment Research and Testing, Lithuanian Energy Institute, Breslaujos Str. 3, LT-44403 Kaunas, Lithuania)

  • Ignas Ambrazevičius

    (Laboratory of Combustion Processes, Lithuanian Energy Institute, Breslaujos Str. 3, LT-44403 Kaunas, Lithuania)

  • Kęstutis Zakarauskas

    (Laboratory of Combustion Processes, Lithuanian Energy Institute, Breslaujos Str. 3, LT-44403 Kaunas, Lithuania)

  • Egidijus Lemanas

    (Laboratory of Heat-Equipment Research and Testing, Lithuanian Energy Institute, Breslaujos Str. 3, LT-44403 Kaunas, Lithuania)

  • Justas Eimontas

    (Laboratory of Combustion Processes, Lithuanian Energy Institute, Breslaujos Str. 3, LT-44403 Kaunas, Lithuania)

  • Nerijus Striūgas

    (Laboratory of Combustion Processes, Lithuanian Energy Institute, Breslaujos Str. 3, LT-44403 Kaunas, Lithuania)

Abstract

This study investigates the combustion of agricultural biomass rich in alkali elements in the fluidized bed. The experiments were performed with smashed corn cob in a 500 kW fluidized bed combustor which was designed for work under low bed temperatures (650–700 °C). During the experiments, the formed compounds from corn cob combustion were measured by sampling particulate matter, and mineral compositions were determined. Also, the temperature profile of the FBC was established. It was determined that the emissions of K and Na elements from the FBC increased from 4 to 7.3% and from 1.69 to 3%, respectively, changing the bed temperature from 650 to 700 °C. Though alkali emissions are reduced at a 650 °C bed temperature, CO emissions are higher by about 50% compared to the case of 700 °C. The addition of 3% of dolomite reduced the pollutant emissions and alkali emissions as well. Potassium content decreased by about 1% and 4%, respectively, at the bed temperatures of 650 °C and 700 °C. The NOx emissions were less than 300 mg/m 3 and did not exceed the limit for medium plants regarding DIRECTIVE (EU) 2015/2193. During extended experiments lasting 8 h, no agglomeration of the fluidized bed was observed. Moreover, the proposed configuration of the FBC and its operational parameters prove suitable for facilitating the efficient combustion of agricultural biomass.

Suggested Citation

  • Rolandas Paulauskas & Marius Praspaliauskas & Ignas Ambrazevičius & Kęstutis Zakarauskas & Egidijus Lemanas & Justas Eimontas & Nerijus Striūgas, 2024. "Performance of Corn Cob Combustion in a Low-Temperature Fluidized Bed," Energies, MDPI, vol. 17(9), pages 1-16, May.
  • Handle: RePEc:gam:jeners:v:17:y:2024:i:9:p:2196-:d:1388140
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    References listed on IDEAS

    as
    1. Igor Donskoy, 2023. "Particle Agglomeration of Biomass and Plastic Waste during Their Thermochemical Fixed-Bed Conversion," Energies, MDPI, vol. 16(12), pages 1-25, June.
    2. Zheng, Liangqian & Jin, Jing & Zhang, Ruipu & Liu, Zhongyi & Zhang, Li, 2023. "Understanding the effect of dolomite additive on corrosion characteristics of straw biomass ash through experiment study and molecular dynamics calculations," Energy, Elsevier, vol. 271(C).
    3. Izabella Maj & Krzysztof Matus, 2023. "Aluminosilicate Clay Minerals: Kaolin, Bentonite, and Halloysite as Fuel Additives for Thermal Conversion of Biomass and Waste," Energies, MDPI, vol. 16(11), pages 1-17, May.
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