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<p>The spatial arrangement of catalytic particles is crucial for the optimization of packed-bed microchannel reactors for efficient direct synthesis of hydrogen peroxide, as it largely affects the multiphase flow behaviors within the catalytic particle pattern. In this work, a lattice Boltzmann study is conducted to unravel the effects of packed-bed column structure, porosity, Reynolds number, and gas bubble size on bubble residence time in and contact area with catalytic particles. Various hierarchy column structures are designed and then examined. We find that reducing the porosity or the Reynolds number can prolong the bubble residence time, while increasing the bubble size can shorten the residence time. Double-layer ordered structure design can increase the contact area by 12% and shorten the residence time by 6%, while a random structure leads to a significant reduction in the contact area by 18.79%–32.66%. The three-level structure design further reduces the residence time by 12% and increases the contact area by 8.7%. Notably, the Coarse-Fine-Random structure shows the longest bubble residence time and Fine-Coarse pattern achieves a maximum contact area. The design of hierarchical pore structures can optimize the residence time and contact area of gas and liquid phases and provide a helpful strategy for the optimization of direct hydrogen peroxide synthesis.</p>

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Multiphase Flow Optimization for H2O2 Production: A LBM Analysis of Bubble Behavior in Packed-Bed Reactors

  • 期刊论文

  • 发表日期：

    2026年1月7日

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  • Haibin Liu,
  • Tao Li,
  • Jiacheng Xie,
  • Shiyu Lv,
  • Zengxi Wei,
  • Shuangliang Zhao

摘要

The spatial arrangement of catalytic particles is crucial for the optimization of packed-bed microchannel reactors for efficient direct synthesis of hydrogen peroxide, as it largely affects the multiphase flow behaviors within the catalytic particle pattern. In this work, a lattice Boltzmann study is conducted to unravel the effects of packed-bed column structure, porosity, Reynolds number, and gas bubble size on bubble residence time in and contact area with catalytic particles. Various hierarchy column structures are designed and then examined. We find that reducing the porosity or the Reynolds number can prolong the bubble residence time, while increasing the bubble size can shorten the residence time. Double-layer ordered structure design can increase the contact area by 12% and shorten the residence time by 6%, while a random structure leads to a significant reduction in the contact area by 18.79%–32.66%. The three-level structure design further reduces the residence time by 12% and increases the contact area by 8.7%. Notably, the Coarse-Fine-Random structure shows the longest bubble residence time and Fine-Coarse pattern achieves a maximum contact area. The design of hierarchical pore structures can optimize the residence time and contact area of gas and liquid phases and provide a helpful strategy for the optimization of direct hydrogen peroxide synthesis.