Mass transfer in liquid–liquid membrane-based extraction at small fiber packing fractions

Asimakopoulou, Akrivi; Karabelas, A.J.

doi:10.1016/j.memsci.2005.07.015

Cited by 29 publications

(12 citation statements)

References 20 publications

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“…Model predictions varied in a much wider range from 0.05 to 20. The predicted values from the correlations of Costello et al, [20] Lipnizki and Field, [12] Li et al, [7] Koo and Sangani, [10] and Asimakopoulou and Karabelas [6] were much higher than the experimental data. However, the correlations by Yang and Cussler, [25] Johnson et al, [18] and Wickramasinghe et al [19] underestimated greatly.…”

Section: Experimental Validation In Handmade Modules With Different Pmentioning

confidence: 89%

“…A monotonic decrease in mass-transfer coefficient with increasing packing density is observed in the correlations proposed by Gawroski and Wrzesinska, [13] Li et al, [7] Costello et al, [20] Basu et al, [21] Thanedgunbaworn et al, [4] and Prasad and Sirkar. [23] On the contrary, the correlations presented by Asimakopoulou and Karabelas, [6] Kartohardjono and Chen, [8] Koo and Sangani, [10] and Zheng et al, [9] show an increase as the packing density increased. However, the predictions from the correlations of Johnson et al [18] and Yang and Cussler [25] are independent of the change in packing density while that of Wu and Chen [15] goes through a minimum with respect to packing density at about 0.55.…”

Section: A Comparison Of Existing Correlationsmentioning

confidence: 93%

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Shell-Side Mass-Transfer Performance in Hollow-Fiber Membrane Contactors

Shen

Kentish

Stevens

2010

Solvent Extraction and Ion Exchange

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The accurate prediction of hollow-fiber membrane performance is limited by models of the shell-side mass-transfer coefficient. A review of the literature suggests that there have been in excess of 30 correlations for this coefficient. This article investigates these correlations in parallel-flow randomly-packed modules and cross-flow hollow-fiber membrane contactors. In particular, the variation of the Sherwood number on the shell side against the Reynolds number and packing density is considered. Shell-side mass-transfer performance is also investigated experimentally in a 10% (v/v) tributyl phosphate (TBP) in Shellsol2046/phenol/water system in four membrane modules. Data are compared with existing model predictions. The predicted values from four correlations agreed well with the observed data in randomly-packed hollow-fiber modules. In the commercial modules, experimental results varied greatly as a function of the Reynolds number. The use of a more consistent approach for the calculation of the linear fluid velocity on the shell side allowed the development of a generalized correlation, Sh s = 0.055Re 0.72 Sc 0.33 , (R 2 = 0.77), that can predict the shell-side mass-transfer coefficient for both handmade and commercial membrane modules.

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Section: Experimental Validation In Handmade Modules With Different Pmentioning

confidence: 89%

Section: A Comparison Of Existing Correlationsmentioning

confidence: 93%

Shell-Side Mass-Transfer Performance in Hollow-Fiber Membrane Contactors

Shen

Kentish

Stevens

2010

Solvent Extraction and Ion Exchange

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“…The main benefits of using HF‐LPME as a sample preparation technique are as follows: (i) improved enrichment and clean‐up of sample, which enables determination of very low concentrations of analytes coupled with its separation from a complex matrix such as blood plasma, natural water, etc. and (ii) its ability to study equilibrium processes, which make possible to determine free analyte concentration in real sample such as natural water and human plasma sample , and determination of thermodynamic binding constant .…”

Section: Introductionmentioning

confidence: 99%

Mass transfer resistance in a liquid‐phase microextraction employing a single hollow fiber under unsteady‐state conditions

Kumrić

Vladisavljević

Đorđević

et al. 2012

J of Separation Science

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In this study, the mass transport resistance in liquid-phase microextraction (LPME) in a single hollow fiber was investigated. A mathematical model has been developed for the determination of the overall mass transfer coefficient based on the acceptor phase in an unsteady state. The overall mass transfer coefficient in LPME in a single hollow fiber has been estimated from time-dependent concentration of extracted analyte in the acceptor phase while maintaining a constant analyte concentration in the donor phase. It can be achieved either using a high volume of donor to acceptor phase ratio or tuning the extraction conditions to obtain a low-enrichment factor, so that the analyte concentration in the sample is not significantly influenced by the mass transfer. Two extraction systems have been used to test experimentally the developed model: the extraction of Lu(III) from a buffer solution and the extraction of three local anesthetics from a buffer or plasma solution. The mass transfer resistance, defined as a reciprocal values of the mass transfer coefficient, was found to be 1.2 × 10(3) cm(-1) min for Lu(III) under optimal conditions and from 1.96 to 3.3 × 10(3) cm(-1) min for the local anesthetics depending on the acceptor pH and the hydrophobicity of the drug.

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“…Of course its adequacy to describe mass transfer in actual apparatuses can be questioned. The equivalent annulus model was compared to experimental results in [Asimakopoulou & Karabelas, 2006a, 2006b]. In their analysis only the entry length solution, Eq.…”

Section: Discussionmentioning

confidence: 99%

Recovery of Biosynthetic Products Using Membrane Contactors

Gostoli¹

2011

Mass Transfer - Advanced Aspects

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Mass transfer in liquid–liquid membrane-based extraction at small fiber packing fractions

Cited by 29 publications

References 20 publications

Shell-Side Mass-Transfer Performance in Hollow-Fiber Membrane Contactors

Shell-Side Mass-Transfer Performance in Hollow-Fiber Membrane Contactors

Mass transfer resistance in a liquid‐phase microextraction employing a single hollow fiber under unsteady‐state conditions

Recovery of Biosynthetic Products Using Membrane Contactors

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