Effect of scale-up on rate of interfacial mass transfer in shallow-bed bubble column reactors

1983 ◽  
Vol 48 (3) ◽  
pp. 703-710
Author(s):  
Milan Rylek ◽  
Karel Svoboda ◽  
Jindřich Zahradník
Keyword(s):  
Mass Transfer ◽  
Cross Section ◽  
Bubble Column ◽  
Scale Up ◽  
Interfacial Area ◽  
Bubble Columns ◽  
Transfer Coefficients ◽  
Bubble Column Reactors ◽  
Specific Interfacial Area ◽  
Interfacial Mass Transfer

Absorption rates of CO2 into aqueous solutions of sodium hydroxide were measured in shallow-bed bubble columns with sieve trays as gas distributors. Experiments were carried out in two cylindrical columns (ID 0.15 and 0.30 m) and in a rectangular unit with square cross-section 1 m2. Liquid side mass transfer coefficients (kL) and specific interfacial area (a) were evaluated from experimental data of absorption rates. The effect of bubble-bed dimensions on mass transfer characteristics is discussed and recommendations for scale-up of bubble column reactors are presented.

Influence of liquid properties on mass transfer coefficients in bubble columns

1988 ◽  
Vol 53 (4) ◽  
pp. 763-770 ◽  
Author(s):  
Kurt Winkler ◽  
František Kaštánek ◽  
Jan Kratochvíl
Keyword(s):  
Mass Transfer ◽  
Gas Phase ◽  
Binary Systems ◽  
Bubble Column ◽  
Surface Force ◽  
Interfacial Area ◽  
Bubble Columns ◽  
Transfer Coefficients ◽  
Phase Velocities ◽  
Specific Interfacial Area

The gas phase holdup, the specific interfacial area a, and the liquid-side volumetric mass transfer coefficient kLa have been determined for two selected binary systems water-butanol and butanol-2-ethylhexanol in a short bubble column of 150 mm i.d. at gas phase velocities (air) in the range of uG = (0.31-2.52) . 10-2 m s-1. The kLa-uG dependences show characteristic maxima which only partially can be explained by molecular and surface force interactions, induced by the liquid phase. The main parameter, influencing the kLa-values, is a. At small gas velocities some irregularities in the Sauter diameter d32 and in the values of separated kL are observed.

Effect of surfactants on mass transfer coefficients in bubble column contactors: an interpretative critical review study

2019 ◽  
Vol 0 (0) ◽  
Author(s):  
Sahand Nekoeian ◽  
Masoud Aghajani ◽  
Seyed Mehdi Alavi ◽  
Fatemeh Sotoudeh
Keyword(s):  
Mass Transfer ◽  
Bubble Column ◽  
Interfacial Area ◽  
Positive Influence ◽  
Transfer Coefficients ◽  
Mass Transfer Coefficients ◽  
Future Studies ◽  
Specific Interfacial Area ◽  
Transfer Operation ◽  
Review Study

Abstract Since surfactants have been recognized as the most frequently faced contaminants of bubble column-related processes over time, their impact on the mass transfer operation of these columns has become a demanding research interest for two recent decades. Despite the similarities expressing the overall negative and positive influence of these chemicals on mass transfer coefficients and specific interfacial area, respectively, the discrepancies and, sometimes, paradoxical results are still under debate in the literature. To make a more comprehensive recognition of the mentioned subject, the current paper has tried to pave the path by reviewing all the major methods utilized in related research works. Thereafter, an interpretative argumentative comparison of the main findings of relevant studies has also been proposed, enlightening some of the research gaps which can be the potential candidates for future studies.

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