Mechanical Solute Dispersion in slender packed bed reactors: Comparing Pore Network Modeling and Particle-Resolved CFD

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Abstract

Packed beds are a versatile workhorse in chemical industry. In this study, Pore Network Model (PNM) and Particle-Resolved Computational Fluid Dynamics (PR-CFD) are employed to simulate purely mechanical solute dispersion, i.e. excluding diffusion, in such packed bed reactors. Our study assesses the changes in flow patterns and mixing effects for these two methods, by examining various geometric configurations (the ratio of the column diameter to particle diameter is 4.2, 5.25, and 7). The PNM shows to match best with the PR-CFD results for the most homogeneous packing, i.e. the largest column-to-particle diameter ratio. While the PNM on pore-level produces good results, it cannot capture all local phenomena, such as Taylor or boundary-layer dispersion, resulting in an underprediction of the dispersion.

Original languageEnglish
Article number126630
Number of pages16
JournalInternational Journal of Heat and Mass Transfer
Volume240
Early online date4 Jan 2025
DOIs
Publication statusE-pub ahead of print - 4 Jan 2025

Bibliographical note

Publisher Copyright:
© 2024 The Authors

Keywords

  • Column-to-particle diameter ratio
  • Dispersion
  • Packed bed reactors
  • Particle-resolved computational fluid dynamics
  • Pore network modeling

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