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Pollutant Emissions during Oxy-Fuel Combustion of Biomass in a Bench Scale CFB Combustor

Author

Listed:
  • Monika Kosowska-Golachowska

    (Department of Thermal Machinery, Czestochowa University of Technology, Armii Krajowej 21, 42-201 Czestochowa, Poland)

  • Adam Luckos

    (School of Chemical and Metallurgical Engineering, University of the Witwatersrand, Braamfontein Campus East, Johannesburg 2050, South Africa)

  • Agnieszka Kijo-Kleczkowska

    (Department of Thermal Machinery, Czestochowa University of Technology, Armii Krajowej 21, 42-201 Czestochowa, Poland)

Abstract

Nowadays oxy-fuel combustion of coal and biomass is the most promising option for the reduction of CO 2 emissions from power plants. In this paper, emissions of NO x (NO, NO 2 , N 2 O and their precursors, such as NH 3 and HCN), SO 2 and CO during conventional and oxy-fuel combustion of three kinds of biomass (agro, woody and energy crop) and a reference coal are presented and discussed. Combustion tests were conducted at 850 °C in the laboratory-scale circulating fluidized bed (CFB) reactor in air and O 2 /CO 2 atmospheres. A FTIR spectrometer was used to measure instantaneous concentrations of all pollutants in the flue gas. Emissions of SO 2 , N 2 O and CO for the combustion of biomass in all atmospheres were lower than those for the combustion of reference coal. It was found that oxidation of nitrogen species released with volatile matter was responsible for high emissions of NO x during combustion of biomass fuels in air and mixtures of O 2 and CO 2 . The lowest NO emissions for tested fuels were detected in oxy-21 atmosphere (21% O 2 /70% CO 2 ). Oxy-combustion of biomass in O 2 /CO 2 mixtures at 30% and 40% O 2 caused a decrease in emissions of N 2 O and CO while NO and SO 2 emissions increased. The results of this study show that the tested biomass fuels are ideal renewable energy resources both in conventional and oxy-fuel conditions with a minor potential for environmental pollution.

Suggested Citation

  • Monika Kosowska-Golachowska & Adam Luckos & Agnieszka Kijo-Kleczkowska, 2022. "Pollutant Emissions during Oxy-Fuel Combustion of Biomass in a Bench Scale CFB Combustor," Energies, MDPI, vol. 15(3), pages 1-23, January.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:3:p:706-:d:728087
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    References listed on IDEAS

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    1. Singh, Ravi Inder & Kumar, Rajesh, 2016. "Current status and experimental investigation of oxy-fired fluidized bed," Renewable and Sustainable Energy Reviews, Elsevier, vol. 61(C), pages 398-420.
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    Cited by:

    1. Fakudze, Sandile & Zhang, Yu & Wei, Yingyuan & Li, Yueh-Heng & Chen, Jianqiang & Wang, Jiaxin & Han, Jiangang, 2023. "Taguchi-optimized oxy-combustion of hydrochar/coal blends for CO2 capture and maximized combustion performance," Energy, Elsevier, vol. 267(C).
    2. Marcel Clemens & Torsten Clemens, 2022. "Scenarios to Decarbonize Austria’s Energy Consumption and the Role of Underground Hydrogen Storage," Energies, MDPI, vol. 15(10), pages 1-23, May.
    3. Agnieszka Kijo-Kleczkowska & Adam Gnatowski, 2022. "Recycling of Plastic Waste, with Particular Emphasis on Thermal Methods—Review," Energies, MDPI, vol. 15(6), pages 1-21, March.
    4. Ling, Jester Lih Jie & Yang, Won & Park, Han Saem & Lee, Ha Eun & Lee, See Hoon, 2023. "A comparative review on advanced biomass oxygen fuel combustion technologies for carbon capture and storage," Energy, Elsevier, vol. 284(C).

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