Correlations of Mass Transfer Coefficients in a Rotating Packed Bed

2011 ◽  
Vol 50 (3) ◽  
pp. 1778-1785 ◽  
Author(s):  
Yu-Shao Chen
Keyword(s):  
Mass Transfer ◽  
Packed Bed ◽  
Transfer Coefficients ◽  
Mass Transfer Coefficients ◽  
Rotating Packed Bed

scholarly journals A Review of Modeling Rotating Packed Beds and Improving Their Parameters: Gas—Liquid Contact

2021 ◽  
Vol 13 (14) ◽  
pp. 8046
Author(s):  
Farhad Ghadyanlou ◽  
Ahmad Azari ◽  
Ali Vatani
Keyword(s):  
Mass Transfer ◽  
Scale Up ◽  
Packed Bed ◽  
Packed Beds ◽  
Transfer Coefficients ◽  
Dimensionless Numbers ◽  
Two Phase ◽  
Shape Factors ◽  
Area Of Interest ◽  
Rotating Packed Bed

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.

Estimation of heat and mass transfer coefficients in a pilot packed-bed solid-state fermentation bioreactor

2020 ◽  
pp. 127246 ◽  
Author(s):  
Anelize Terezinha Jung Finkler ◽  
Mariana Zanlorenzi Weber ◽  
Gustavo Alexandre Fuchs ◽  
Leandro Aluisio Scholz ◽  
Luiz Fernando de Lima Luz Jr ◽  
...  
Keyword(s):  
Mass Transfer ◽  
Solid State ◽  
Heat And Mass Transfer ◽  
Solid State Fermentation ◽  
Packed Bed ◽  
Transfer Coefficients ◽  
Mass Transfer Coefficients

Henry's constants and mass transfer coefficients of halogenated organic pollutants in an air stripping packed column

1998 ◽  
Vol 38 (6) ◽  
pp. 287-294 ◽  
Author(s):  
Pen-C. Chiang ◽  
Chung-H. Hung ◽  
J. C. Mar ◽  
E. E. Chang
Keyword(s):  
Mass Transfer ◽  
Methylene Chloride ◽  
Packed Column ◽  
Transfer Coefficients ◽  
Chlorinated Organic Compounds ◽  
Air Stripping ◽  
Mass Transfer Coefficients ◽  
Equilibrium Partition ◽  
Henry's Constants ◽  
Chlorinated Organic

Both Henry's constants and volumetric mass transfer coefficients (KLa) of eight priority chlorinated organic compounds including 1,1-dichloroethene, methylene chloride, chloroform, carbon tetrachloride, 1,1,1-trichloroethane, trichloroethylene, tetrachloroethylene, and 1,4-dichlorobenzene in an air stripping packed column were investigated in this study. The liquid and gas phase EPICS (Equilibrium Partition in Closed System) and direct calculating methods were applied to determine the Henry's constants of VOCs. The interference of co-solute on Henry's constants was also investigated. Experimental results indicated that decrease in Henry's constants of VOCs was observed in the presence of humic acid but no apparent effect on Henry's constants was detected when there was NaCl and surfactant in solution. Four different configurations of packing media including Intalox Saddle, Super Intalox Saddle, Telleret, and Hedgehog made of polypropylene were respectively packed in the air stripping tower and investigated in the study. The dependence of hydraulic loading, air-water ratio, and configurations of packing media on mass transfer coefficients of VOCs was discussed.

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