TY - JOUR

T1 - Experimental Study of Mass Transfer in a Plug Regime of Immiscible Liquid–Liquid Flow in a T-Shaped Microchannel

AU - Vostretsov, Semyon

AU - Yagodnitsyna, Anna

AU - Kovalev, Alexander

AU - Bilsky, Artur

N1 - The slug flow properties study (Section 3.1) was supported by a grant from the Russian Science Foundation (project No 21-79-10307). Mass transfer measurements (Section 3.2) have been financially supported by the Ministry of Science and Higher Education of the Russian Federation, Project No 075-15-2022-1043.

PY - 2023/5

Y1 - 2023/5

N2 - In the presented work, the influence of parameters such as the total flow rate of phases, the ratio of flow rates, and residence time on mass transfer during the two-phase flow of immiscible liquids in a T-shaped microchannel was investigated using the micro-LIF technique. The study focused on the plug flow regime, where a 70% water–glycerol solution was used as the dispersed phase, and tri-n-butyl phosphate (TBP) was used as the carrier phase. We determined the transition boundary between the dispersed and parallel flow patterns and calculated the plug length and velocities to develop a mass transfer model. Furthermore, we measured the partition coefficient for the set of liquids used in the experiments and analyzed the concentration fields inside the slugs of the continuous phase at various distances downstream of the T-junction. Using the obtained data, we determined the extraction efficiency and overall volumetric mass transfer coefficient and established dependencies demonstrating the effect of the flow-rate ratio, total flow rate, and the residence time on mass transfer rate and extraction efficiency. Finally, we developed a model for the overall volumetric mass transfer coefficient corresponding to the set of liquids used with an R-squared value of 0.966.

AB - In the presented work, the influence of parameters such as the total flow rate of phases, the ratio of flow rates, and residence time on mass transfer during the two-phase flow of immiscible liquids in a T-shaped microchannel was investigated using the micro-LIF technique. The study focused on the plug flow regime, where a 70% water–glycerol solution was used as the dispersed phase, and tri-n-butyl phosphate (TBP) was used as the carrier phase. We determined the transition boundary between the dispersed and parallel flow patterns and calculated the plug length and velocities to develop a mass transfer model. Furthermore, we measured the partition coefficient for the set of liquids used in the experiments and analyzed the concentration fields inside the slugs of the continuous phase at various distances downstream of the T-junction. Using the obtained data, we determined the extraction efficiency and overall volumetric mass transfer coefficient and established dependencies demonstrating the effect of the flow-rate ratio, total flow rate, and the residence time on mass transfer rate and extraction efficiency. Finally, we developed a model for the overall volumetric mass transfer coefficient corresponding to the set of liquids used with an R-squared value of 0.966.

KW - extraction

KW - immiscible liquids

KW - mass transfer

KW - micro-LIF

KW - microchannel

UR - https://www.scopus.com/record/display.uri?eid=2-s2.0-85160607131&origin=inward&txGid=e7737f420daaf1f937f3ae9dd62d4b4e

UR - https://www.mendeley.com/catalogue/e8e35649-d093-30f0-957b-a56532060b0d/

U2 - 10.3390/en16104059

DO - 10.3390/en16104059

M3 - Article

VL - 16

JO - Energies

JF - Energies

SN - 1996-1073

IS - 10

M1 - 4059

ER -