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3-D numerical simulation for co-firing of torrefied biomass in a pulverized-fired 1 MWth combustion chamber

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  • Stroh, Alexander
  • Alobaid, Falah
  • Busch, Jan-Peter
  • Ströhle, Jochen
  • Epple, Bernd

Abstract

Torrefaction process is a promising technology for changing the chemical and physical properties of biomass so, that it can be used in existing pulverized fuel firing systems. A numerical 3-D simulation to study the combustion behaviour of torrefied biomass in a pulverized-fired furnace has been carried out. In the model different reaction kinetics for devolatilization and char oxidation of three biomass components, namely hemicellulose, cellulose and lignin, have been applied. The reaction kinetic parameters for pyrolysis and char oxidation were determined by experimental work using thermogravimetric analysis (TGA). In numerical studies three different fuel blends were examined, which include pure coal, ∼9% and ∼17% (thermal basis) torrefied sawdust in coal. Gas concentrations, temperature distribution, pyrolysis and char reactions were analyzed along the 1 MWth combustion chamber. The numerical investigation suggests that the torrefied biomass can be used as a substitute fuel for coal without modifications in the co-firing system. However, the case-study with the highest biomass substitute leads to an incomplete decomposition of the lignin component, due to coarser biomass particles and decreased char reaction rates.

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  • Stroh, Alexander & Alobaid, Falah & Busch, Jan-Peter & Ströhle, Jochen & Epple, Bernd, 2015. "3-D numerical simulation for co-firing of torrefied biomass in a pulverized-fired 1 MWth combustion chamber," Energy, Elsevier, vol. 85(C), pages 105-116.
    • Handle: RePEc:eee:energy:v:85:y:2015:i:c:p:105-116
    DOI: 10.1016/j.energy.2015.03.078
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    References listed on IDEAS

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    Cited by:

    1. Ali Cemal Benim & Cansu Deniz Canal & Yakup Erhan Boke, 2021. "A Validation Study for RANS Based Modelling of Swirling Pulverized Fuel Flames," Energies, MDPI, vol. 14(21), pages 1-33, November.
    2. Maximilian von Bohnstein & Coskun Yildiz & Lorenz Frigge & Jochen Ströhle & Bernd Epple, 2020. "Simulation Study of the Formation of Corrosive Gases in Coal Combustion in an Entrained Flow Reactor," Energies, MDPI, vol. 13(17), pages 1-24, September.
    3. Ramos, Ana & Monteiro, Eliseu & Rouboa, Abel, 2019. "Numerical approaches and comprehensive models for gasification process: A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 110(C), pages 188-206.
    4. Yin, Chungen, 2020. "Development in biomass preparation for suspension firing towards higher biomass shares and better boiler performance and fuel rangeability," Energy, Elsevier, vol. 196(C).
    5. Szufa, S. & Piersa, P. & Junga, R. & Błaszczuk, A. & Modliński, N. & Sobek, S. & Marczak-Grzesik, M. & Adrian, Ł. & Dzikuć, M., 2023. "Numerical modeling of the co-firing process of an in situ steam-torrefied biomass with coal in a 230 MW industrial-scale boiler," Energy, Elsevier, vol. 263(PE).
    6. Ramos, Ana & Monteiro, Eliseu & Silva, Valter & Rouboa, Abel, 2018. "Co-gasification and recent developments on waste-to-energy conversion: A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 81(P1), pages 380-398.
    7. Alobaid, Falah & Ohlemüller, Peter & Ströhle, Jochen & Epple, Bernd, 2015. "Extended Euler–Euler model for the simulation of a 1 MWth chemical–looping pilot plant," Energy, Elsevier, vol. 93(P2), pages 2395-2405.

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