Measurement and Correlation of the Mass Transfer Coefficient for a Liquid-Liquid System With High Density Difference

Abstract

-To investigate the mass transfer behavior of a liquid-liquid system with high density difference (∆ρ≈500 kg/m 3 ), single drop experiments were performed by using the ternary chloroform-ethanol-water system. The mass transfer direction was from the dispersed phase to the continuous phase, while the aqueous phase was dispersed in chloroform to generate drops. The influences of drop diameter, initial solute concentration and temperature on the mass transfer were investigated. The effects of the drop diameter and initial solute concentration on interfacial instability of droplets hanging in the continuous phase were also observed. For the purpose of correlation, a mass transfer enhancement factor F was introduced and then correlated as a function of dimensionless variables. The modified correlation from the mass transfer coefficient model was found to fit well with the experimental values.

Tannins extraction: A key point for their valorization and cleaner production

“…The temperature of extraction is observed to increase the extraction yields as displayed in the 6 results from table 3 (Kemppainen et al, 2014;Vázquez et al, 2001). This enhancement is due to 7 the increase of the mass transfer coefficient at higher temperatures (Huang et al, 2016). Moreover 8 the increment of the temperature results in the improvement of the solute solubility and diffusion 9 coefficient and also decreases of solvent viscosity, which promotes the extraction (Al-Farsi and 10 Lee, 2008).…”

Kinetic Study of the Epoxidation Intensification of Methyl Oleate by Phase-Transfer Catalysis in a Micellar Medium

“…The increase in overall coefficients is linked to molecular agitation and the drop-in viscosity of the medium, increasing the diffusion of the transferred chemical species at the interface. , …”

“…25 The increase in overall coefficients is linked to molecular agitation and the drop-in viscosity of the medium, increasing the diffusion of the transferred chemical species at the interface. 25,26 Concentration of the Surfactant. The experimental results obtained as a function of the concentrations of polysorbate 80 and Triton X-100 are used.…”

A state-of-the-art review on single drop study in liquid–liquid extraction: Experiments and simulations

“…However, West et al [48] found that the results were different as much as fivefold from Sherwood's, which was likely caused by the difference in purity of the benzene used in experiment. More recently, Huang et al [61] presented mass transfer study along single drop rising in a system with high density difference, and specific cleaning procedure was performed before each experiment run. Different influencing factors were involved.…”