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Aspen Simulation Study of Dual-Fluidized Bed Biomass Gasification

Author

Listed:
  • Jida Zhang

    (China Coal (Tianjin) Underground Engineering Intelligent Research Institute Co., Ltd., Tianjin 300131, China)

  • Liguo Yang

    (Energy Research Institute, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250014, China)

Abstract

This article establishes a thermodynamic model of a dual-fluidized bed biomass gasification process based on the Aspen Plus software platform and studies the operational control characteristics of the dual-fluidized bed. Firstly, the reliability of the model is verified by comparing it with the existing experimental data, and then the influence of different process parameters on the operation and gasification characteristics of the dual-fluidized bed system is investigated. The main parameters studied in the operational process include the fuel feed rate, steam/biomass ratio (S/B), air equivalent ratio (ER), and circulating bed material amount, etc. Their influence on the gasification product composition, reactor temperature, gas heat value (Q V ), gas production rate (G V ), carbon conversion rate (η c ), and gasification efficiency (η) is investigated. The study finds that fuel feed rate and circulating bed material amount are positively correlated with Q V , η c , and η; ER is positively correlated with G V and η c but negatively correlated with Q V and η; S/B is positively correlated with G V , η c , and η but negatively correlated with Q V . The addition of CaO is beneficial for increasing Q V . In actual operation, a lower reaction temperature in the gasification bed can be achieved by reducing the circulating bed material amount, and a larger temperature difference between the combustion furnace and the gasification furnace helps to further improve the quality of the gas. At the same time, G V , η c , and η need to be considered to find the most optimized operating conditions for maximizing the benefits. The model simulation results agree well with the experimental data, providing a reference for the operation and design of dual-fluidized beds and chemical looping technology based on dual-fluidized beds.

Suggested Citation

  • Jida Zhang & Liguo Yang, 2024. "Aspen Simulation Study of Dual-Fluidized Bed Biomass Gasification," Energies, MDPI, vol. 17(10), pages 1-21, May.
    • Handle: RePEc:gam:jeners:v:17:y:2024:i:10:p:2381-:d:1395001
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    References listed on IDEAS

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    1. Kathe, Mandar V. & Empfield, Abbey & Na, Jing & Blair, Elena & Fan, Liang-Shih, 2016. "Hydrogen production from natural gas using an iron-based chemical looping technology: Thermodynamic simulations and process system analysis," Applied Energy, Elsevier, vol. 165(C), pages 183-201.
    2. Xiaoquan Zhou & Liguo Yang & Xiaoxu Fan & Xuanyou Li, 2023. "Experimental Study on the Preparation of Hydrogen-Rich Gas by Gasifying of Traditional Chinese Medicine Residue in a DFB Based on Calcium Looping," Energies, MDPI, vol. 16(11), pages 1-13, May.
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