Application of Electric Fields to Solvent Extraction

Yamaguchi, Manabu

doi:10.1002/9783527615254.ch10

Cited by 4 publications

(2 citation statements)

References 19 publications

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“…In a typical stage-wise extractor, the phases are fed to a mixer and are separated in a settler for the next stage; whereas, differential extractors provide a steady contact of dispersed and continuous phases in columns or centrifugal contactors. 2 Extraction columns provide a high contact area between phases; however, performing experiments in large-scale columns is accompanied with problems. Thus, single drop experiments in laboratory or pilot-scale setups are inevitable for basic studies.…”

Section: Introductionmentioning

confidence: 99%

“…Accordingly, industrial-scale extractors are classified into stage-wise and differential types. In a typical stage-wise extractor, the phases are fed to a mixer and are separated in a settler for the next stage; whereas, differential extractors provide a steady contact of dispersed and continuous phases in columns or centrifugal contactors . Extraction columns provide a high contact area between phases; however, performing experiments in large-scale columns is accompanied with problems.…”

Section: Introductionmentioning

confidence: 99%

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Utilizing Low-Voltage Pulsed Electric Fields for Mass Transfer Intensification of Drops in Liquid–Liquid Extraction

Jafari

Saien

2021

Ind. Eng. Chem. Res.

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Low-voltage pulsed electric fields, corresponding to field strengths of 2–16 V/cm, were utilized for mass transfer intensification of drops in a liquid–liquid extraction process. The chemical system of kerosene–acetic acid–water was used in which mass transfer resistance lies mainly in the kerosene phase. The applied frequencies were within 100–1000 Hz. In a hydrodynamic study, the circulating state of drops was confirmed based on different criteria and their terminal velocity precisely followed the Grace model. A mass transfer study of drops, on the other hand, revealed the strong impact of a pulsed electric field with the average and maximum enhancements of 30.3 and 70.5%. This can be attributed to the interfacial instability due to switching poles in the pulsed electric field. An optimum frequency of about 300 Hz corresponded to the applied voltages. Applying a direct electric field also had desired effects but in a lower extent. The provided mass transfer coefficient data were reproduced based on the Kumar and Hartland correlation together with a developed correlation of the enhancement factor in terms of dimensionless field strength, frequency, and the drops’ Reynolds number. The maximum deviation between experimental and predicted Sherwood numbers was ±5%.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%