Radially layered configuration for improved performance of packed bed reactors

Weng, Junqi; Zhang, Qunfeng; Yu, Jiahao; Yu, Qihuan; Ye, Guanghua; Zhou, Xinggui

doi:10.1016/j.ces.2022.117917

Cited by 6 publications

(1 citation statement)

References 42 publications

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“…Rigid body dynamics method is employed to generate the packed beds with different tube-to-particle diameter ratios and of different particle shapes, and the details of this method can be found in the literature. [35][36][37][38] This work accounts for six typical particle shapes, namely sphere, cylinder, Raschig ring, four-hole cylinder, trilobe, and quadrilobe, as these particle shapes are commonly used in the industry. These particles of different shapes are the maximum ones that share the same circumscribed cylinder.…”

Section: Particle Packingmentioning

confidence: 99%

Numerical determination of fluid‐to‐particle mass and heat transfer coefficients in packed bed reactors

Weng

Zhang

et al. 2022

AIChE Journal

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A method based on particle‐resolved CFD is built and validated, to calculate the fluid‐to‐particle mass and heat transfer coefficients in packed beds of spheres with different tube‐to‐particle diameter ratios (N) and of various particle shapes with N = 5.23. This method is characterized by considering axial dispersion. The mass and heat transfer coefficients increase by 5%–57% and 9%–63% after considering axial dispersion, indicating axial dispersion should be included in the method. The mass and heat transfer coefficients are reduced as N decreases. The catalyst particles without inner holes show higher mass and heat transfer coefficients than the ones with inner holes, because of unfavorable fluid flow in inner holes. The bed of trilobes has the highest mass and heat transfer coefficients, being 85% and 95% higher than the one of spheres. This work provides a versatile method and some useful guidance for the design of packed bed reactors.

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Section: Particle Packingmentioning

confidence: 99%