Pressure Drop of Centripetal Gas Flow through Rotating Beds

Chen, Zheng; Guo, Kai; Feng, Yongjun; Yang, Chen; Gardner, N.C.

doi:10.1021/ie980703d

Cited by 58 publications

(56 citation statements)

References 7 publications

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“…As dr approach zero, the channel can be described as a virtual tube. Furthermore, Zheng et al, Sandilya et al, Liu et al, and Rao et al studied the angular velocity of gas in RPB and found that the gas flows are circular with very small velocity differences between the gas flows and the packings are observed. Therefore, the distribution of the gas velocity is of axial symmetry.…”

Section: Dynamics Of Droplets In Rpbmentioning

confidence: 99%

“…Zheng et al, Sandilya et al, Liu et al, and Rao et al studied the angular velocity of gas in the RPB and found that the gas goes round and round in RPB and is keeping pace with the packings all the time. This assertion is supported by the work of Liu et al These observations indicate that the circumferential force exerted by packings counterbalances with Coriolis force, which means that packings do affect on the gas continually.…”

Section: Mass‐transfer Coefficients In Rpbsmentioning

confidence: 99%

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Dynamics of droplets and mass transfer in a rotating packed bed

Yan

Cheng

2014

AIChE Journal

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in Wiley Online Library (wileyonlinelibrary.com)To do further research on the mass-transfer mechanism in rotating packed bed (RPB), dynamics of droplets in a RPB are studied by an analytical approach combined with a series of laboratory measurements. Based on the results of the fluid dynamics, mathematical models of mass-transfer coefficient and mass-transfer process in RPB are proposed, respectively. Mass-transfer experiments in RPB are also carried out using ethanol-water solution. By comparison, the results of simulation agree well with that of the experiment, which demonstrate that both hydrodynamic model and mass-transfer models can better describe the real conditions of RPB.

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Section: Dynamics Of Droplets In Rpbmentioning

confidence: 99%

Section: Mass‐transfer Coefficients In Rpbsmentioning

confidence: 99%

Dynamics of droplets and mass transfer in a rotating packed bed

Yan

Cheng

2014

AIChE Journal

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“…The MT rate directly depends on hold-up, which is a function of the rotational speed, and ω directly depends on the radius of the packing [34]. Furthermore, the rate of pressure drop within the RPB increases with an increased rpm, as illustrated by the results of Zheng et al and Sandalia et al [35,36]. Additionally, as examined and discussed in [37,38], the height of transfer unit (HTU) achieved in an RPB is lower than that in a PBC under the same conditions.…”

Section: Rpb Advantages and Configurationsmentioning

confidence: 91%

A Review of Modeling Rotating Packed Beds and Improving Their Parameters: Gas–Liquid Contact

2021

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The aim of this review is to investigate a kind of process intensification equipment called a rotating packed bed (RPB), which improves transport via centrifugal force in the gas—liquid field, especially by absorption. Different types of RPB, and their advantages and effects on hydrodynamics, mass transfer, and power consumption under available models, are analyzed. Moreover, different approaches to the modeling of RPB are discussed, their mass transfer characteristics and hydrodynamic features are compared, and all models are reviewed. A dimensional analysis showed that suitable dimensionless numbers could make for a more realistic definition of the system, and could be used for prototype scale-up and benchmarking purposes. Additionally, comparisons of the results demonstrated that Re, Gr, Sc, Fr, We, and shape factors are effective. In addition, a study of mass transfer models revealed that the contact zone was the main area of interest in previous studies, and this zone was not evaluated in the same way as packed beds. Moreover, CFD studies revealed that the realizable k-ε turbulence model and the VOF two-phase model, combined with experimental reaction or mass transfer equations for analyzing hydrodynamic and mass transfer coefficients, could help define an RPB system in a more realistic way.

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“…Consequently, the study of the pressure drop should verify the feasibility of the equipment before we study the characteristics of mass transfer. Zheng et al studied the pressure drop of centripetal gas flow through rotating beds and established a semi‐empirical sectional pressure drop model based on conservation of mass and momentum. Sandilya et al deduced corresponding formulas of pressure drop and studied the pressure drop and the gas‐side mass transfer coefficient on SO 2 absorption by sodium hydroxide solution with glycerin.…”

Section: Introductionmentioning

confidence: 99%

Experimental study of gas pressure drop in rotating packed bed with rotational‐stationary packing

et al. 2017

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Rotating packed bed (RPB) with rotational-stationary packing is a novel instrument that could greatly enhance mass transfer compared with the conventional packed columns. The structure of rotational-stationary packing makes the gas repeatedly enter the packing to increase the end effect. Meanwhile, owing to the resistance of the packing to the gas, the gas pressure drop of rotating packed bed with rotational-stationary packing becomes the necessary factor that can evaluate the equipment. The gas pressure drop of the dry bed and wet bed were determined at various operating variables, including the rotational speed, the gas flow rate, and the liquid flow rate. In this work, the gas pressure drop was classified on the basis of the gas flow path and the corresponding theoretical formulas were provided. The pressure drop of the dry bed increased with increasing rotational speed and gas flow rate was observed, and the liquid flow rate had little influence on the pressure drop of the wet bed. Finally, the experimental values were fitted to the theoretical formula and the relationship between total pressure drop and rotational speed, gas flow rate in a RPB with rotational-stationary packing was presented. The theoretical calculated values agreed well with the experimental data with a deviation within 6 %. These will provide the gas pressure drop theoretical calculation formula for a kind of RPB with rotational-stationary packing.

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Pressure Drop of Centripetal Gas Flow through Rotating Beds

Cited by 58 publications

References 7 publications

Dynamics of droplets and mass transfer in a rotating packed bed

Dynamics of droplets and mass transfer in a rotating packed bed

A Review of Modeling Rotating Packed Beds and Improving Their Parameters: Gas–Liquid Contact

Experimental study of gas pressure drop in rotating packed bed with rotational‐stationary packing

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