Unified correlations for the prediction of the slip velocity, characteristic velocity, flooding throughput and flooding slip velocity in a pulsed disc and doughnut extraction column

2021 ◽  
pp. 1-13
Author(s):  
Vivekananda Sinha ◽  
Tessy Vincent
Keyword(s):  
Slip Velocity ◽  
Extraction Column ◽  
Characteristic Velocity ◽  
Velocity Characteristic

scholarly journals Dispersed phase hold-up and characteristic velocity in a pulsed packed extraction column

2012 ◽  
Vol 18 (2) ◽  
pp. 255-262 ◽  
Author(s):  
Mehdi Asadollahzadeh ◽  
Jaber Safdari ◽  
Ali Haghighi-Asl ◽  
Meisam Torab-Mostaedi
Keyword(s):  
Physical Properties ◽  
Packed Column ◽  
Operating Conditions ◽  
Empirical Correlation ◽  
Extraction Column ◽  
Dispersed Phase ◽  
Characteristic Velocity ◽  
Operating Variables ◽  
Liquid Systems ◽  
Good Agreement

Dispersed phase hold-up has been measured in a 76.2 mm diameter pulsed packed column for four different liquid-liquid systems. The effects of pulsation intensity, phase ratio, and packing characteristic on the hold-up have been investigated under a variety of operating conditions. The dispersed phase axial hold-up shows a strong non-uniformity, depending on the operating conditions. The results indicated that the characteristic velocity approach is applicable to this type of extraction column for analysis of hold-up. An empirical correlation is derived for prediction of the hold-up in terms of operating variables, physical properties of the systems, and packing geometry. Good agreement between prediction and experiments was observed for all investigated operating conditions.

Study of axial mixing, holdup and slip velocity of dispersed phase in a pulsed sieve plate extraction column using radiotracer technique

2009 ◽  
Vol 67 (7-8) ◽  
pp. 1248-1253 ◽  
Author(s):  
Ghiyas Ud Din ◽  
Imran Rafiq Chughtai ◽  
Mansoor Hameed Inayat ◽  
Iqbal Hussain Khan
Keyword(s):  
Slip Velocity ◽  
Extraction Column ◽  
Dispersed Phase ◽  
Sieve Plate ◽  
Radiotracer Technique

scholarly journals Slip velosity in pulsed disc and doughnut extraction columns

2011 ◽  
Vol 17 (3) ◽  
pp. 333-339 ◽  
Author(s):  
Meisam Torab-Mostaedi ◽  
Hossein Jalilvand ◽  
Mohammad Outokesh
Keyword(s):  
Slip Velocity ◽  
Energy Input ◽  
Continuous Phase ◽  
Operating Conditions ◽  
Extraction Column ◽  
Empirical Correlations ◽  
Flow Rates ◽  
Operating Variables ◽  
Liquid Systems ◽  
Good Agreement

In the present work, slip velocity has been measured in a 76 mm diameter pulsed disc and doughnut extraction column for four different liquid-liquid systems. The effects of operating variables including pulsation intensity and dispersed and continuous phase flow rates on slip velocity have been investigated. The existence of three different operational regimes, namely mixer-settler, transition, and emulsion regimes, was observed when the energy input was changed. Empirical correlations are derived for prediction of the slip velocity in terms of operating variables, physical properties of the liquid systems, and column geometry for different regimes. Good agreement between prediction and experiments was found for all operating conditions that were investigated.

scholarly journals Holdup and characteristic velocity in a pulsed packed extraction column

2020 ◽  
Vol 9 (8) ◽  
pp. e674982543
Author(s):  
Jarlon Conceição da Costa ◽  
Luiz Mário Nelson de Góis ◽  
Silvana Mattedi e Silva
Keyword(s):  
Flow Rate ◽  
Water System ◽  
Continuous Phase ◽  
Liquid System ◽  
Operating Conditions ◽  
Extraction Column ◽  
Dispersed Phase ◽  
Internal Diameter ◽  
Phase Flow ◽  
Characteristic Velocity

The present work aims to evaluate the hydrodynamics of a pulsed packed extractor, with an internal diameter of 0.026m and a length of 1.0m, using the liquid butanol-water system. Thus, the basic parameters obtained for the hydrodynamic study of the extraction column in question as dispersed phase, slip velocity, characteristic velocity and flooding point. The methodology used in the work consisted of determining the holdup fraction of the dispersed phase, obtained through tests of simultaneous interruptions in the column feedings. The effects of frequency pulsation, dispersed phase flow rate and continuous phase flow rate investigated in the analysis of these parameters. New empirical correlations derived from the predictions of the parameters studied obtained in terms of operating variables and physical properties of the liquid system involved. The average absolute value of the relative error (AARE) was always below 5.6%. Good agreement between calculated and experimental results observed for all investigated operating conditions.

Holdup and characteristic velocity in a Hanson mixer–settler extraction column

2010 ◽  
Vol 88 (5-6) ◽  
pp. 703-711 ◽  
Author(s):  
M. Napeida ◽  
A. Haghighi Asl ◽  
J. Safdari ◽  
M. Torab-Mostaedi
Keyword(s):  
Extraction Column ◽  
Characteristic Velocity
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