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模拟毛孔催化剂的干燥过程:毛孔尺寸分布的影响

David R Rieder¹, Elias A J F Peters¹, Johannes A M Kuipers¹

¹Multiphase Reactors Group, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, MB Eindhoven 5600, The Netherlands.

Industrial & engineering chemistry research

|December 1, 2023

概括

催化剂孔径分布影响干燥. 少量的大孔加速干燥,降低压力,对活跃物种分布的影响最小.

科学领域:

化学工程是化学工程的重要组成部分.
材料科学材料科学材料科学
催化剂是一种催化剂.

背景情况:

异质多孔催化剂中的催化活性物种分布对于工业反应堆的性能和耐用性至关重要.
了解催化剂干燥过程中的物种再分配对于优化过程至关重要.

研究的目的:

开发和实施一个干燥模型来研究多孔催化剂中的物种再分布.
分析不同孔径分布对干燥过程中物种再分配的影响.

主要方法:

开发了一种使用有限体积方法的干燥模型.
整合了基于孔径大小分布的透性和毛细血管压力的分析方法.
量化了不同毛孔尺寸分布对物种再分配的影响.

主要成果:

小量的大孔加速干燥过程,并显著减少内部压力积累.
存在少量大孔的存在对催化活性物种的最终分布的影响微不足道.
增加大孔的比例有助于物种在干燥表面的积累.

结论:

毛孔尺寸分布是控制干燥动态和催化剂物种再分配的关键因素.
量身定制毛孔尺寸分布可以优化催化剂干燥,以提高性能和寿命.
开发的模型为预测和控制工业催化过程中的物种分布提供了有价值的工具.

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相关概念视频

Pore Size Distribution

Pore Size Distribution

In concrete, the pore size distribution significantly influences the material's properties. Capillary pores, markedly larger than gel pores, form a vast network within partially hydrated cement paste, reducing the concrete's strength and increasing its permeability. This heightened permeability leads to a greater risk of damage from environmental factors like freeze-thaw cycles and chemical attacks, with the extent of vulnerability also being tied to the water-to-cement ratio.
Adequate...