Liquid flow behavior in the concentric mesh packing with novel fiber cross-sectional shape in a rotating packed bed

Wen, Zhang‐Nan; Li, Yanbin; Xu, Han-Zhuo; Xu, Ying-Chun; Sun, Baochang; Zou, Hai‐Kui; Chu, Guang‐Wen

doi:10.1016/j.cej.2022.139094

Cited by 6 publications

(9 citation statements)

References 44 publications

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“…However, the kinetic energy of bubbles decreased in the process of impacting wire meshes, leading to a reduction in bubble velocity. 23 The velocity of bubbles under packing with a mesh number of 12 was 21.7% higher than that of packing with a mesh number of 30. The larger the mesh number, the smaller the mesh opening size.…”

Section: Bubble Velocitymentioning

confidence: 90%

“…The position close to the packing periphery and sensitive to packing configurations was chosen to represent bubbles dispersed by packing. 19,23 The probe direction was along the tangential direction of the rotating packing, ensuring the probe tip pierced bubbles in the normal direction of the incoming bubbles surface. 33 The emission and reception of laser signals were achieved by a laser module.…”

Section: Methodsmentioning

confidence: 99%

“…Considering the combined effects of the above parameters on bubble characteristics, establishing correlations was essential to summarize the influences of parameters and provide fundamental data for mass-transfer modeling. The nondimensional parameter φ was adopted to evaluate the influence of packing mesh number as follows 23 = +…”

Section: Bubble Velocitymentioning

confidence: 99%

“…The φ reflected the probability of bubbles uncaptured by fibers of mesh, which was directly related to mesh number. 23,44 Through analysis based on Buckingham Pi theorem, the nondimensional Reynolds number (Re) and Weber number (We) were adopted, which have been widely used as dimensionless groups in the correlations for bubble flow characteristics like bubble diameter and bubble velocity. 45,46…”

Section: Bubble Velocitymentioning

confidence: 99%

“…Based on flow visualization results, the liquid was proved to form tiny elements of films, ligaments, and droplets . Lots of investigations concerning liquid holdup, wetting behavior, droplet diameter, and droplet velocity, , in RPB have been conducted, demonstrating the merit of rotating packing to reinforce the gas–liquid interface renewal rate and promote the mass-transfer rate. Unfortunately, conventional RPBs cannot meet the reaction needs of gas-dispersed systems due to a short residence time and high gas–liquid ratio .…”

Section: Introductionmentioning

confidence: 99%

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Local Gas Holdup, Bubble Size Distribution, and Bubble Velocity in a Submerged Rotating Packed Bed Reactor

Yang,

Xu,

et al. 2024

Ind. Eng. Chem. Res.

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Rotating packed bed (RPB) commonly generates tremendous centrifugal force to disperse the liquid phase and promote mass-transfer processes. However, plenty of chemical processes, such as oxidation and fluorination, featuring dispersed gas and continuous liquid, exist in the chemical industry. The gas-dispersed systems possessed low gas/liquid ratios, and the liquid residence time and operating mode of conventional RPBs cannot meet such reaction needs. Herein, a submerged RPB was developed for gas-dispersed systems. The stainless-steel wire mesh packing was immersed in liquid, while gas was dispersed and cocurrently flowed with liquid through the rotating packing. Hydrodynamic characteristics of the gas dispersion performance were then investigated by optical probe measurements. Results indicated that local gas holdup (0.85−5.42%) was proportionally correlated to the gas flow rate. Bubble size conformed to the log−normal distribution with a standard deviation in ranges of 0.59−1.17. With the elevation of rotational speed and diminishment of aeration rate, Sauter mean diameter of bubbles (d 32 , 1.49−5.51 mm) was decreased, and the average velocity of bubbles (v, 0.56−1.85 m/s) was increased. In a 0.05% ethanol−water solution, bubble coalescence probability could be reduced, and the bubble size was 20.2% smaller than that in water. Correlations to predict d 32 and v were established with deviations less than ±20 and ±15%, respectively.

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Section: Bubble Velocitymentioning

confidence: 90%

Section: Methodsmentioning

confidence: 99%

Section: Bubble Velocitymentioning

confidence: 99%

Section: Bubble Velocitymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Local Gas Holdup, Bubble Size Distribution, and Bubble Velocity in a Submerged Rotating Packed Bed Reactor

Yang,

Xu,

et al. 2024

Ind. Eng. Chem. Res.

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Parametric Study of Experimental and CFD Simulation Based Hydrodynamics and Mass Transfer of Rotating Packed Bed: A Review

Zahir

Perumal

Saptoro

et al. 2023

Arch Computat Methods Eng

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The emission of CO2 into the atmosphere is one of the major causes of the greenhouse effect, which has a devastating effect on the environment and human health. Therefore, the reduction of CO2 emission in high concentration is essential. The Rotating Packed Bed (RPB) reactor has gained a lot of attention in post-combustion CO2 capture due to its excellent rate of mass transfer and capture efficiency. To better understand the mechanisms underlying the process and ensure optimal design of RPB for CO2 absorption, elucidating its hydrodynamics is of paramount importance. Experimental investigations have been made in the past to study the hydrodynamics of RPB using advanced imaging and instrumental setups such as sensors and actuators. The employments of such instruments are still challenging due to the difficulties in their installation and placement in the RPB owing to the complex engineering design of the RPB. The hydrodynamics of the RPB can be affected by various operational parameters. However, all of them cannot be evaluated using a single instrumental setup. Therefore, the experimental setups generally result in a partial understanding of the flow behavior in the RPB. The cons and pros of experimental methods are reported and critically discussed in this paper. Computational Fluid Dynamics (CFD), on the other hand, is a powerful tool to visually understand the insights of the flow behavior in the RPB with accurate prediction. Moreover, the different multiphase and turbulence models employed to study the hydrodynamics of RPB have also been reviewed in-depth along with the advantages and disadvantages of each model. The models such as Sliding Mesh Model (SMM) and rotating reference frame model have been adopted for investigating the hydrodynamics of the RPB. The current research gaps and future research recommendations are also presented in this paper which can contribute to fill the existing gap for the CFD analysis of Rotating Packed Bed (RPB) for CO2 absorption.

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Liquid dispersion behaviors in a rotating packed bed with different packing arrangements: A comparison study

Xu,

Liu,

et al. 2024

Chemical Engineering Science

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Liquid flow behavior in the concentric mesh packing with novel fiber cross-sectional shape in a rotating packed bed

Cited by 6 publications

References 44 publications

Local Gas Holdup, Bubble Size Distribution, and Bubble Velocity in a Submerged Rotating Packed Bed Reactor

Local Gas Holdup, Bubble Size Distribution, and Bubble Velocity in a Submerged Rotating Packed Bed Reactor

Parametric Study of Experimental and CFD Simulation Based Hydrodynamics and Mass Transfer of Rotating Packed Bed: A Review

Liquid dispersion behaviors in a rotating packed bed with different packing arrangements: A comparison study

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