Mass-transfer efficiency of sieve tray extractors

Rocha, J. A.; Humphrey, J. L.; Fair, James R.

doi:10.1021/i200035a005

Cited by 24 publications

(20 citation statements)

References 7 publications

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“…Therefore, an increase in the number of plates reduced the height for the travel of drops before coalescence, which led to a slight decrease in dispersed phase dynamic hold-up. These results are well supported by earlier reported work (Lodh and Rao, 1966;Krishnamurty and Rao, 1968;Rocha et al, 1986). …”

Section: Effect Of Plate Spacingsupporting

confidence: 93%

Hydrodynamics of Plate Column for Enzymatic Reactions of Oil

Dondge

Rathod

2015

Braz. J. Chem. Eng.

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-This work describes the hydrodynamics of a plate column of 5 cm inner diameter and 2.75 m height, operated in a semi-batch manner using an oil-water system especially important for enzymatic catalyzed reactions. The parameters such as dispersed phase superficial velocity, plate orifice size, number of nozzles, nozzle size and plate spacing, affecting the dispersed phase hold up, were investigated. It was observed that the orifice plate produced an uneven change in drop diameter and hence nozzles were used to study the hydrodynamics. The total and dynamic hold ups determined were increased with an increase in dispersed phase superficial velocity, while decreased with an increase in a nozzle size. The total hold up decreased, while dynamic hold up slightly increased with an increase in plate spacing. Correlations obtained are found to be appropriate for the estimation of the total hold up and dynamic hold up.

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Section: Effect Of Plate Spacingsupporting

confidence: 93%

Hydrodynamics of Plate Column for Enzymatic Reactions of Oil

Dondge

Rathod

2015

Braz. J. Chem. Eng.

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“…The model selected for evaluation represents a slight modification of the one published by Rocha (1984) and Rocha et al (1986). It is composed of individual modules for predicting hydraulic parameters, mass-transfer coefficients, and Murphree and overall efficiencies.…”

Section: Modeling Of Experimental Resultsmentioning

confidence: 99%

“…other hand, there has been a significant amount of work in the area of efficiency modeling and prediction in liquid-liquid extraction. Rocha et al (1986) have reviewed previous work in this area, with emphasis on sieve tray contactors. They have also described an improved model for predicting efficiency in sieve tray columns and have compared it with other models such as the ones by Treybal (1963by Treybal ( , 1980, Skelland and Conger (1973), and Pilhofer (1981).…”

Section: Previous Workmentioning

confidence: 99%

“…Three high-pressure systems were studied: liquid C02/2-propanol/water (LC/I/W), supercritical C02/ 2-propanol/water (SC/I/W), and supercritical C02/ ethanol/water (SC/E/W). One conventional liquid-liquid extraction system, toluene/acetone/water (T/A/W), was also investigated in order to provide a base for comparison as well as to "calibrate" the experimental apparatus with respect to other equipment used previously in our laboratories for liquid extraction projects (Rocha et al, 1986). " These values are for the C02/water system.…”

Section: Test Systemsmentioning

confidence: 99%

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Mass-transfer efficiencies of column contactors in supercritical extraction service

Lahiere¹,

Fair²

1987

Ind. Eng. Chem. Res.

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“…In attempting to predict E,, we examined each factor in the prediction model proposed by Rocha et al (1986), and recommend the following method to predict the overall efficiency of a MU trays column. (a) The Sauter mean drop diameter is determined using Equation (14).…”

Section: Measurement and Correlation For Overall Efficiencymentioning

confidence: 99%

Hydrodynamic and mass transfer performance of multiple upcomer extraction trays

Zhu

Luo

1997

Can J Chem Eng

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The multiple upcomer (Mu) extraction tray was specifically developed for aromatics extraction processes. Hydrodynamic and mass transfer experiments have been carried out w i t h n-butanollsuccinic acidwater as an experimental system in a MU tray extraction column of 0.1 m diameter. The dispersed phase hold-up, drop s u e and overall efticiency were measured and the hydrodynamic and mass transfer parameters were correlated. The flooding velocities and the overall efficiency predicted from the correlation for this column agreed well with the experimental data.

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Mass-transfer efficiency of sieve tray extractors

Cited by 24 publications

References 7 publications

Hydrodynamics of Plate Column for Enzymatic Reactions of Oil

Hydrodynamics of Plate Column for Enzymatic Reactions of Oil

Mass-transfer efficiencies of column contactors in supercritical extraction service

Hydrodynamic and mass transfer performance of multiple upcomer extraction trays

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