Effect of liquid-phase properties on separation efficiency in a randomly packed distillation column

2015 ◽  
Vol 93 (6) ◽  
pp. 1119-1125 ◽  
Author(s):  
Andrea J. Bader ◽  
Artin Afacan ◽  
Dave Sharp ◽  
Karl T. Chuang
Keyword(s):  
Liquid Phase ◽  
Distillation Column ◽  
Separation Efficiency ◽  
Packed Distillation Column ◽  
Phase Properties

scholarly journals Modeling of the Structure of Flows in a Nozzle Rectification Column by the Velocity Profile of the Steam Phase

2021 ◽  
Vol 135 (4) ◽  
pp. 46-49
Author(s):  
A. B. Golovanchikov ◽  
◽  
N. A. Prokhorenko ◽  
Keyword(s):  
Liquid Phase ◽  
Velocity Profile ◽  
Flow Structure ◽  
Distillation Column ◽  
Response Curves ◽  
Rectification Column ◽  
Indicator Method ◽  
Integral Response ◽  
Combined Models ◽  
Packed Distillation Column

An algorithm has been developed for calculating the main parameters of the flow structure by the velocity profile of the boiling liquid phase in a packed distillation column: differential and integral response and dispersion functions without determining the response curves by the indicator method. An example of the calculation of the above parameters and modeling according to standard and combined models is given: cell, one-parameter diffusion and with a series connection of zones of displacement and mixing.

APPLICATION OF MULTIVARIABLE GENERALIZED PREDICTIVE CONTROL TO A PACKED DISTILLATION COLUMN

1999 ◽  
Vol 174 (1) ◽  
pp. 61-84 ◽  
Author(s):  
H. HAPOGˇLU ◽  
S. KARACAN ◽  
Y. CABBAR ◽  
C. E. BALAS ◽  
M. ALPBAZ*
Keyword(s):  
Predictive Control ◽  
Distillation Column ◽  
Generalized Predictive Control ◽  
Packed Distillation Column

Time-Optimal Startup of a Packed Distillation Column

1998 ◽  
Vol 31 (11) ◽  
pp. 111-116 ◽  
Author(s):  
M. Flender ◽  
G. Wozny ◽  
G. Fieg
Keyword(s):  
Distillation Column ◽  
Time Optimal ◽  
Packed Distillation Column

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.

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