The influence of nanoparticles on hydrodynamic characteristics and mass transfer performance in a pulsed liquid–liquid extraction column

2011 ◽  
Vol 50 (11-12) ◽  
pp. 1198-1206 ◽  
Author(s):  
Amir Bahmanyar ◽  
Nafiseh Khoobi ◽  
Mohammad Reza Mozdianfard ◽  
Hossein Bahmanyar
Keyword(s):  
Mass Transfer ◽  
Liquid Extraction ◽  
Hydrodynamic Characteristics ◽  
Extraction Column ◽  
Transfer Performance ◽  
Liquid Liquid Extraction

Mass transfer from nanofluid drops in a pulsed liquid–liquid extraction column

2014 ◽  
Vol 92 (11) ◽  
pp. 2313-2323 ◽  
Author(s):  
Amir Bahmanyar ◽  
Nafiseh Khoobi ◽  
Mostafa Mohammad Ali Moharrer ◽  
Hossein Bahmanyar
Keyword(s):  
Mass Transfer ◽  
Liquid Extraction ◽  
Extraction Column ◽  
Liquid Liquid Extraction

Impacts of SiO2 and MgO nanoparticles on mass transfer performance of batch liquid-liquid extraction

2016 ◽  
Vol 47 (5) ◽  
pp. 677-680
Author(s):  
Mohammad Sadjad Sepehri Sadeghian ◽  
Danial Abooali ◽  
Ahmad Rahbar-Kelishami
Keyword(s):  
Mass Transfer ◽  
Liquid Extraction ◽  
Transfer Performance ◽  
Mgo Nanoparticles ◽  
Liquid Liquid Extraction

Hydrodynamics of a cocurrent downward liquid–liquid extraction column

RSC Advances ◽  
2016 ◽  
Vol 6 (15) ◽  
pp. 12439-12445 ◽  
Author(s):  
S. Samdavid ◽  
T. Renganathan ◽  
K. Krishnaiah
Keyword(s):  
Liquid Extraction ◽  
Hydrodynamic Characteristics ◽  
Extraction Column ◽  
Liquid Liquid Extraction

The present study focuses on the hydrodynamic characteristics of a cocurrent liquid–liquid downward system with perforated distributor.

scholarly journals Effect of tray design on the performance of a vibrating plate extraction column

2015 ◽  
Author(s):  
◽  
Nomakhosi Dorothy Sincuba
Keyword(s):  
Mass Transfer ◽  
Chemical Engineering ◽  
Liquid Extraction ◽  
Separation Process ◽  
Gas Absorption ◽  
Close Relative ◽  
Extraction Column ◽  
Dispersed Phase ◽  
Liquid Liquid Extraction ◽  
Vibrating Plate

There are various types of separation processes used in industries, such as, distillation, liquid-liquid extraction and gas absorption. Liquid-liquid extraction (LLE) is a separation process that involves mass transfer from a liquid mixture to an immiscible extraction solvent. This process is generally used where the mixture cannot be separated by fractional distillation due to close relative volatilities of the mixture components or for heat sensitive components. LLE is rated as the second most important separation process after distillation and it is widely used in chemical engineering industries. Different types of columns are available for LLE. Reciprocating and vibrating plate extraction columns are mechanically agitated extraction columns. In this research a vibrating plate extraction column was utilised. It uses perforated plates with down-comers. The perforations provide passage for the dispersed phase, while down-comers provide passage for the continuous phase. The effectiveness of a vibrating plate extractor was previously investigated but limited research was conducted on the effect of the different tray designs and agitation levels (as the product of amplitude and frequency of vibration). These variables affect the hydrodynamics and mass transfer in the column. The determination of the optimum process parameters is important in achieving the highest separation efficiency of the vibrating extraction column. The focus of this research is to test the effect of different tray designs in order to enhance the separation process efficiency. All tests were conducted using the toluene-acetone-water system as a standard test system proposed by the European Federation for Chemical Engineering, (1985). The experiments were conducted to test the effect of mass transfer on the hydrodynamics of the system while changing the agitation levels, downcomers and hole diameters. A comparative investigation was conducted on straight segment and circular downcomers, then hole diameters analysis was performed on the effective downcomer Comparison of the effect of the tray design types on the amount of acetone extracted was utilised to select the effective tray. Tray with the circular downcomer and 3.0 mm hole diameter had high dispersed phase holdup values and with the highest percentage amount of acetone extracted (95.05%) was obtained compared to other tray designs investigated.

Gas-Agitated Liquid-Liquid Extraction in a Spray Column

1994 ◽  
Vol 59 (10) ◽  
pp. 2235-2243 ◽  
Author(s):  
Milan Sovilj ◽  
Goran Kneževic
Keyword(s):  
Gas Phase ◽  
Liquid Extraction ◽  
Hydrodynamic Characteristics ◽  
Extraction Column ◽  
Phase System ◽  
Two Phase ◽  
Flow Rates ◽  
Liquid Liquid Extraction ◽  
Three Phase ◽  
Phase Water

The hydrodynamic characteristics of the air water toluene three-phase system in a spray extraction column at 20 °C were examined. The average and local hold-up data of the dispersed phase were determined in dependence on the flow rates of the continuous, dispersed and gaseous phases. The average gas phase hold-up was also measured and analyzed. A comparison was made of the hydrodynamic characteristics of the two-phase (water - toluene) and three-phase (air - water - toluene) systems.

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