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3D Eulerian-Eulerian modeling of a screw reactor for biomass thermochemical conversion. Part 2: Slow pyrolysis for char production

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  • Shi, Xiaogang
  • Ronsse, Frederik
  • Nachenius, Robert
  • Pieters, Jan G.

Abstract

Biomass slow pyrolysis inside a screw reactor was studied using three-dimensional (3D) computational fluid dynamics (CFD) modeling. A multi-component (cellulose, hemicellulose and lignin with detailed elemental composition), multi-step kinetic model was incorporated into the CFD model. Modeling results were compared with experimental results with respect to the steady-state axial temperature distribution in the reactor (mean deviation, MD, of 12.6 K at the operating temperature of 598 K), the product yields (MDs of 7.7 wt%, 6.2 wt% and 1.7 wt% for the mass yields of char, liquid product, and gas product, respectively) and the elemental composition of char (MD of 1.6 wt%, 0.9 wt% and 2.5 wt% for the mass fractions of C, H and O, respectively). The model was then used to predict the energy density (higher heating value, HHV) and the energy yield of char, and these modeling results were compared against experimental data (MD of about 1.0 MJ kg−1 for the HHV and of about 9.4 wt% for the energy yield). Simulation results indicate that the model can well predict biomass pyrolysis and can predict the quality (e.g. HHV) and the energy yield in the resulting char.

Suggested Citation

  • Shi, Xiaogang & Ronsse, Frederik & Nachenius, Robert & Pieters, Jan G., 2019. "3D Eulerian-Eulerian modeling of a screw reactor for biomass thermochemical conversion. Part 2: Slow pyrolysis for char production," Renewable Energy, Elsevier, vol. 143(C), pages 1477-1487.
  • Handle: RePEc:eee:renene:v:143:y:2019:i:c:p:1477-1487
    DOI: 10.1016/j.renene.2019.05.088
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    References listed on IDEAS

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    Cited by:

    1. Tao Chen & Xiaoke Ku & Jianzhong Lin & Henrik Ström, 2020. "CFD-DEM Simulation of Biomass Pyrolysis in Fluidized-Bed Reactor with a Multistep Kinetic Scheme," Energies, MDPI, vol. 13(20), pages 1-19, October.
    2. Stanisław Ledakowicz & Olexa Piddubniak, 2023. "Temperature Distribution in a Finite-Length Cylindrical Channel Filled with Biomass Transported by Electrically Heated Auger," Energies, MDPI, vol. 16(17), pages 1-23, August.
    3. Stanisław Ledakowicz & Olexa Piddubniak, 2022. "The Non-Stationary Heat Transport inside a Shafted Screw Conveyor Filled with Homogeneous Biomass Heated Electrically," Energies, MDPI, vol. 15(17), pages 1-16, August.
    4. Rezapour, Mojtaba & Gholizadeh, Mohammad, 2021. "Analysis of methanol thermochemical reactor with volumetric solar heat flux based on Parabolic Trough Concentrator," Renewable Energy, Elsevier, vol. 180(C), pages 1088-1100.
    5. Thoharudin, & Hsiau, Shu-San & Chen, Yi-Shun & Yang, Shouyin, 2022. "Numerical modeling of biomass fast pyrolysis by using an improved comprehensive reaction scheme for energy analysis," Renewable Energy, Elsevier, vol. 181(C), pages 355-364.

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