Gas Holdup and Pressure Drop in Bubble Column Reactors

1980 ◽  
Vol 19 (3) ◽  
pp. 371-377 ◽  
Author(s):  
Donald N. Miller
Keyword(s):  
Pressure Drop ◽  
Bubble Column ◽  
Gas Holdup ◽  
Bubble Column Reactors

Studies of Gas Holdup in Bubble Column Reactors

2000 ◽  
Vol 23 (10) ◽  
pp. 919-921 ◽  
Author(s):  
M. Jamialahmadi ◽  
H. Müller-Steinhagen ◽  
A. Sarrafi ◽  
J. M. Smith
Keyword(s):  
Bubble Column ◽  
Gas Holdup ◽  
Bubble Column Reactors

The effect of liquid phase properties on gas holdup in bubble column reactors

1987 ◽  
Vol 52 (2) ◽  
pp. 335-347 ◽  
Author(s):  
Jindřich Zahradník ◽  
Rudolf Peter ◽  
František Kaštánek
Keyword(s):  
Liquid Phase ◽  
Aqueous Solutions ◽  
Bubble Column ◽  
Gas Holdup ◽  
Bubble Coalescence ◽  
Large Set ◽  
Bubble Column Reactors ◽  
Liquid Systems ◽  
Coalescence Suppression ◽  
Phase Properties

The effect of liquid phase properties on gas holdup in bubble column reactors was investigated within a large set of gas-liquid systems. Air was used as a gaseous phase in all experiments, liquid phases included distilled water and aqueous solutions of alcohols and electrolytes. Gas holdup values were determined in a sieve tray bubble column 0.15 m i.d. under conditions of stable uniform gas distribution and an attempt was made to relate these data with values of bubble coalescence ratio determined for respective gas-liquid systems in a coalescence cell. Experimental results proved strong influence of solute addition on bubble coalescence reduction and on the increase of gas holdup values in aqueous solutions of both alcohols and electrolytes. An unambiguous dependence was observed between gas holdup data and values of bubble coalescence ratio in alcohols solutions, the effect of coalescence suppression on gas holdup enhancement increased markedly with increasing gas flow rates. An empirical equation was proposed for estimation of lower and upper gas holdup limits in electrolyte solutions within the coalescence suppression region, i.e. at solute concentrations above coalescence transition value.With the exception of concentrated glycerol solutions, homogeneous bubble beds were generated in all gas-liquid systems using the appropriate gas distributing plate. The positive effect of coalescence restraining on gas holdup values was even more significant in homogeneous bubble beds than under conditions of turbulent bubbling regime.

Predictions of radial gas holdup profiles in bubble column reactors

2001 ◽  
Vol 56 (3) ◽  
pp. 1207-1210 ◽  
Author(s):  
Yuanxin Wu ◽  
Boon Cheng Ong ◽  
M.H. Al-Dahhan
Keyword(s):  
Bubble Column ◽  
Gas Holdup ◽  
Bubble Column Reactors

GAS HOLDUP IN UNIFORMLY AERATED BUBBLE COLUMN REACTORS

1979 ◽  
Vol 3 (4-5) ◽  
pp. 413-429 ◽  
Author(s):  
J. ZAHRADNIK ◽  
F. KAŠT´NEK
Keyword(s):  
Bubble Column ◽  
Gas Holdup ◽  
Bubble Column Reactors
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