Polydispersity and backmixing effects in diffusion controlled mass transfer with irreversible chemical reaction: An analysis of liquid emulsion membrane processes

Lorbach, D.; Hatton, T. Alan

doi:10.1016/0009-2509(88)87001-5

Cited by 24 publications

(3 citation statements)

References 25 publications

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“…However, from a practical standpoint the difference in extraction rates is negligible. This result conforms to the predictions of Teramoto et al [7] and Lorbach and Hatton [8]. It is further seen from Fig.…”

Section: Resultssupporting

confidence: 93%

Polydispersity effect in facilitated transport through liquid surfactant membranes

Datta

Sanyal

1995

Chem Eng & Technol

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An advancing reaction-front model has been proposed in the present study of facilitated transport through liquid surfactant membranes by taking into consideration a size distribution of emulsion drops. The model takes into account the continuous and outer liquid membrane phase resistances along with diffusion through composite emulsion drops. The effect of various dispersion phenomena on the mass transfer rate of solute has been discussed for two different operating conditions corresponding to different drop size distributions but having the same Sauter mean diameter. Membrane leakage is assumed to be negligible.

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Section: Resultssupporting

confidence: 93%

Polydispersity effect in facilitated transport through liquid surfactant membranes

Datta

Sanyal

1995

Chem Eng & Technol

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“…It is vital to estimate the effects of the hydrodynamic properties including the axial mixing of the continuous phase and the polydispersity of the dispersed drops on the mass transfer performance. , Due to the axial mixing, the flow pattern in the RDC column deviates from ideal plug flow and the concentration gradient at the axial direction of the column declines. Usually, the degree of the axial mixing can be quantitatively described by the axial dispersion coefficient ( E M ). , To date, the axial mixing analysis for the continuous operation of the ELM is extremely scanty.…”

Section: Introductionmentioning

confidence: 99%

“…Chakraborty et al investigated the effect of drop size distribution on the mass transfer analysis in a batch ELM operation. Lorbach and Hatton systematically studied the polydispersity of the drops in column-type contactors, batch operation vessel and mixer-settler, respectively. In the above two papers, the advancing front model was used to describe the mass transfer in the different sized emulsion drops.…”

Section: Introductionmentioning

confidence: 99%

Influences of Axial Mixing of Continuous Phase and Polydispersity of Emulsion Drops on Mass Transfer Performance in a Modified Rotating Disc Contactor for an Emulsion Liquid Membrane System

Zeng

Yang

Liu

et al. 2015

Ind. Eng. Chem. Res.

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A mathematical model considering the effects of axial mixing of continuous phase and polydispersity of dispersed emulsion drops was developed to describe the mass transfer mechanism of an emulsion liquid membrane (ELM) in a modified rotating disc contactor (MRDC). The calculated results indicate that the axial mixing lowered the concentration gradient along the column, and the polydispersity caused the maldistribution of the interfacial area and the volume for the different sized drops, which also reduced the mass transfer performance. In order to evaluate the degree of the axial mixing and the polydispersity, the important variables affecting axial dispersion coefficient (E M), emulsion phase holdup (Φ), and drop size distribution (α and β) including rotating speed, flow ratio, total flow, surfactant concentration, and stirring paddle width were also studied. It was found that the standard deviation of the drop size (β) had same variation trend as the mean drop size (α). The increase in the rotating speed and the paddle width enhanced the turbulence which increased the E M and the Φ and simultaneously decreased the α and the β. The increase in the flow ratio markedly increased the Φ, the α, and the β, whereas the increase in the total flow signally increased the E M. The increase in the surfactant concentration primarily decreased the α and the β; meanwhile, the membrane leakage was obviously inhibited. Finally, the dimensionless correlations were established to predict these hydrodynamic parameters (E M, Φ, α, and β) with the AAREs of 5.2%, 7.5%, 2.7%, and 4.4%, respectively.

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Recovery of Biological Products by Liquid Emulsion Membranes

Patnaik¹

1998

Bioseparation and Bioprocessing

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Polydispersity and backmixing effects in diffusion controlled mass transfer with irreversible chemical reaction: An analysis of liquid emulsion membrane processes

Cited by 24 publications

References 25 publications

Polydispersity effect in facilitated transport through liquid surfactant membranes

Polydispersity effect in facilitated transport through liquid surfactant membranes

Influences of Axial Mixing of Continuous Phase and Polydispersity of Emulsion Drops on Mass Transfer Performance in a Modified Rotating Disc Contactor for an Emulsion Liquid Membrane System

Recovery of Biological Products by Liquid Emulsion Membranes

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