Volumetric Gas−Liquid Mass Transfer Coefficient in Aerated Stirred Tank Reactors with Dense Floating Solid Particles

2011 ◽  
Vol 51 (4) ◽  
pp. 1938-1948 ◽  
Author(s):  
Atsushi Tagawa ◽  
Naoki Dohi ◽  
Yoshinori Kawase
Keyword(s):  
Mass Transfer ◽  
Transfer Coefficient ◽  
Mass Transfer Coefficient ◽  
Solid Particles ◽  
Stirred Tank ◽  
Stirred Tank Reactors ◽  
Liquid Mass ◽  
Liquid Mass Transfer

Particle−Liquid Mass Transfer Coefficient in Two-/Three-Phase Stirred Tank Reactors

2002 ◽  
Vol 41 (17) ◽  
pp. 4141-4167 ◽  
Author(s):  
V. G. Pangarkar ◽  
A. A. Yawalkar ◽  
M. M. Sharma ◽  
A. A. C. M. Beenackers
Keyword(s):  
Mass Transfer ◽  
Transfer Coefficient ◽  
Mass Transfer Coefficient ◽  
Stirred Tank ◽  
Stirred Tank Reactors ◽  
Liquid Mass ◽  
Three Phase ◽  
Liquid Mass Transfer

scholarly journals Gas-Liquid Mass Transfer Coefficient in Stirred Tank Reactors

2008 ◽  
Vol 80 (5) ◽  
pp. 840-848 ◽  
Author(s):  
Archis A. Yawalkar ◽  
Albertus B. M. Heesink ◽  
Geert F. Versteeg ◽  
Vishwas G. Pangarkar
Keyword(s):  
Mass Transfer ◽  
Transfer Coefficient ◽  
Mass Transfer Coefficient ◽  
Stirred Tank ◽  
Stirred Tank Reactors ◽  
Liquid Mass ◽  
Liquid Mass Transfer

Effect of bubble contamination on gas–liquid mass transfer coefficient on CO2 absorption in amine solutions

2008 ◽  
Vol 137 (2) ◽  
pp. 422-427 ◽  
Author(s):  
Rocío Maceiras ◽  
Sebastião S. Alves ◽  
M. Ángeles Cancela ◽  
Estrella Álvarez
Keyword(s):  
Mass Transfer ◽  
Transfer Coefficient ◽  
Mass Transfer Coefficient ◽  
Co2 Absorption ◽  
Liquid Mass ◽  
Liquid Mass Transfer ◽  
Amine Solutions

scholarly journals Numerical study of the hydrodynamics and mass transfer in the external loop airlift reactor

2021 ◽  
pp. 34-34
Author(s):  
Predrag Kojic ◽  
Jovana Kojic ◽  
Milada Pezo ◽  
Jelena Krulj ◽  
Lato Pezo ◽  
...  
Keyword(s):  
Mass Transfer ◽  
Transfer Coefficient ◽  
Mass Transfer Coefficient ◽  
Airlift Reactor ◽  
Volumetric Mass Transfer Coefficient ◽  
Cfd Model ◽  
Gas Velocity ◽  
Liquid Mass ◽  
External Loop ◽  
Liquid Mass Transfer

The objective of this study was to investigate the hydrodynamics and the gas-liquid mass transfer coefficient of an external-loop airlift reactor (ELAR). The ELAR was operated in three cases: different inlet velocities of fluids, different alcohols solutions (water, 0.5% methanol, 0.5% ethanol, 0.5% propanol and 0.5% butanol) and different concentration of methanol in solutions (0%, 0.5%, 1%, 2% and 5%). The influence of superficial gas velocity and various diluted alcohol solutions on hydrodynamics and gas-liquid mass transfer coefficient of the ELAR was studied. Experimentally, the gas hold-up, liquid velocities and volumetric mass transfer coefficient values in the riser and the downcomer were obtained from the literature source. A computational fluid dynamics (CFD) model was developed, based on two-phase flow, investigating different liquids regarding surface tension, assuming the ideal gas flow, applying the finite volume method and Eulerian-Eulerian model. The volumetric mass transfer coefficient was determined using CFD model, as well as artificial neural network model. The effects of liquid parameters and gas velocity on the characteristics of the gas-liquid mass transfer were simulated. These models were compared with appropriate experimental results. CFD model successfully succeed to simulate the influence of different alcohols regarding the number of C-atoms on hydrodynamics and mass transfer.

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