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Numerical analysis of carbon dioxide mineralization process in a bubbling fluidized bed

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  • Li, Erchao
  • Lin, Junjie
  • Wang, Shuai
  • Wang, Tao
  • Luo, Kun
  • Fan, Jianren

Abstract

The excessive emission of CO2 has led to a series of environmental challenges. To mitigate global climate change, carbon capture, utilization, and storage (CCUS) has become an essential strategy. Among various CCUS technologies, CO2 mineralization is particularly promising due to its high efficiency and stability. In this study, a reactive multiphase particle-in-cell (MP-PIC) model is developed to simulate the CO2 mineralization process in a bubbling fluidized bed (BFB) reactor, incorporating dense gas-solid two-phase flow, heat and mass transfer, and chemical reactions. The reaction kinetics model was validated by experimental data. The effects of gas velocity and sand particle size distribution (PSD) on the mineralization process are systematically investigated. The results indicate that as gas velocity increases, the adsorption efficiency initially decreases and then improves. When the gas velocity is 0.2 m/s or above 0.8 m/s, the adsorption efficiency is above 80 %. When the gas velocity is 0.5 m/s, the adsorption efficiency is 50 %. At lower gas velocities, bubble formation allows gas to bypass solid particles, reducing adsorption efficiency. At higher gas velocities, frequent bubble coalescence and breakup enhance gas-solid mixing, thereby promoting heat and mass transfer. Furthermore, a wider PSD of sand particles leads to significant axial segregation, causing adsorbent particles to cluster, which negatively impacts the mineralization reaction.

Suggested Citation

  • Li, Erchao & Lin, Junjie & Wang, Shuai & Wang, Tao & Luo, Kun & Fan, Jianren, 2025. "Numerical analysis of carbon dioxide mineralization process in a bubbling fluidized bed," Energy, Elsevier, vol. 339(C).
    • Handle: RePEc:eee:energy:v:339:y:2025:i:c:s0360544225045554
    DOI: 10.1016/j.energy.2025.138913
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    References listed on IDEAS

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    1. Zhou, Tao & Yang, Shiliang & Wei, Yonggang & Hu, Jianhang & Wang, Hua, 2020. "Impact of wide particle size distribution on the gasification performance of biomass in a bubbling fluidized bed gasifier," Renewable Energy, Elsevier, vol. 148(C), pages 534-547.
    2. Wan, Zhanghao & Yang, Shiliang & Hu, Jianhang & Bao, Guirong & Wang, Hua, 2022. "CFD study of the reactive gas-solid hydrodynamics in a large-scale catalytic methanol-to-olefin fluidized bed reactor," Energy, Elsevier, vol. 243(C).
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