Image processing of computed tomography scanned poly-dispersed beds for computational fluid dynamic studies

Kyrimis, Stylianos; Raja, Robert; Armstrong, Lindsay-Marie

doi:10.1016/j.apt.2023.104199

Cited by 2 publications

(1 citation statement)

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“…In addition, the case studied here uses simplified spherical particles. More complex particle shapes, such as those examined in our CT-scanned bed, ,, will exhibit different local hydrodynamic behavior, which will affect the reactant accessibility into the pores. Consequently, the ability of the PP model to account for both inter- and intraparticle gradients in the local bed and particle structure, velocity, and pressure can be highly valuable to approach such cases.…”

Section: Resultsmentioning

confidence: 99%

Quantifying the Impact of Intraparticle Convection within Fixed Beds Formed by Catalytic Particles with Low Macro-Porosities

Kyrimis,

Potter,

Raja

et al. 2023

ACS Eng. Au

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Computational fluid dynamics (CFD) modeling plays a pivotal role in optimizing fixed bed catalytic chemical reactors to enhance performance but must accurately capture the various length-and time-scales that underpin the complex particle−fluid interactions. Within catalytic particles, a range of pore sizes exist, with micro-pore scales enhancing the active surface area for increased reactivity and macro-pore scales enhancing intraparticle heat and mass transfer through intraparticle convection. Existing particle-resolved CFD models primarily approach such dual-scale particles with low intraparticle macro-porosities as purely solid. Consequently, intraparticle phenomena associated with intraparticle convection are neglected, and their impact in the full bed scale is not understood. This study presents a porous particle CFD model, whereby individual particles are defined through two distinct porosity terms, a macro-porosity term responsible for the particle's hydrodynamic profile and a micro-porosity term responsible for diffusion and reaction. By comparing the flow profiles through full beds formed by porous and solid particles, the impact of intraparticle convection on mass and heat transfer, as well as on diffusion and reaction, was investigated.

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Section: Resultsmentioning

confidence: 99%