Correlation of the Drop Size in a Modified Scheibel Extraction Column

Yuan, Shenfeng; Shi, Yufan; Yin, Hongxi; Chen, Z.; Zhou, Jingsong

doi:10.1002/ceat.201100470

Cited by 18 publications

(8 citation statements)

References 12 publications

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“…The following differential equations can be obtained by normalization of Eqs. (18) and (19): The boundary conditions are: at Z = 1 X = 0 and at Z = 0 Y = 0 Furthermore, the interfacial area is obtained as follows:…”

Section: Plug Flow Modelmentioning

confidence: 99%

“…In our previous studies, we have investigated the hydrodynamic behavior of the L-shaped pulsed column [14][15][16]. Generally, the design and optimization of an extraction column require the calculation of two key factors including the required height of the column and the cross-sectional area [17,18]. The determination of these parameters is required to achieve the desired mass transfer rate and to accommodate the desired flows, along with reaching the maximum capacity without flooding.…”

Section: Introductionmentioning

confidence: 99%

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Prediction of Concentration Profiles in an L‐Shaped Pulsed Extraction Column

et al. 2019

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The L-shaped extraction pulsed plate column is believed to be able to perform under operating conditions between those of the vertical and the horizontal pulsed plate columns. It has an extraction efficiency similar to the vertical pulsed plate column. Here, the mass transfer performance of this novel column type was investigated and the application of three different models, i.e., the plug flow, the axial dispersion, and the back flow models, was evaluated to predict the solute concentration profile along the column length. The water-acetone-n-butyl acetate and the water-acetone-toluene systems were used. The influence of the operational parameters on the height of the mass transfer unit and the back flow coefficients was evaluated using the back flow model. New correlations were proposed to predict the height of the mass transfer unit along with the back flow coefficients in each phase, which were in satisfactory agreement with the experimental data.

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Section: Plug Flow Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Prediction of Concentration Profiles in an L‐Shaped Pulsed Extraction Column

et al. 2019

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“…Liquid‐liquid extraction in pulsed columns is a frequently applied technique in chemical engineering, hydrometallurgy, nuclear technology, and other areas due to its high separation efficiency by reducing axial mixing and increasing drop breakup and coalescence rate 1–3, and by controlling the pulse intensity which improves the rate of mass transfer by size reduction of the drops 4. Mass transfer is a function of the interfacial area which can be calculated from drop size and holdup 5, 6. The larger the drops, the smaller are holdup and interfacial area.…”

Section: Introductionmentioning

confidence: 99%

Effect of Structural Parameters on Drop Size Distribution in Pulsed Packed Columns

et al. 2014

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The effect of packing type on drop size distribution in pulsed packed columns was investigated by means of different columns and three packing types with three liquid systems including n‐butyl acetate, toluene, and kerosene with water. These liquid systems cover a wide range of interfacial tensions. Also the influence of operating variables in terms of pulse intensity and volumetric flow rates of dispersed and continuous phases was examined. Pulse intensity, interfacial tension, and packing shape were found as the main important factors for drop size distribution while volumetric flow rates had no significant effect. Correlations are presented to predict drop distribution and mean drop size in pulsed packed columns.

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“…Various equations have been proposed to calculate d 32 in the extraction columns, but no equations have been reported yet to estimate d 32 in a Scheibel extraction column in the presence of silica nanoparticles. Yuan et al proposed a correlation to calculate d 32 in a modified‐Scheibel‐extraction column without mass transfer:

\frac{{normald}_{32}}{D} = 0.509 {(\frac{{normalQ}_{normald}}{{ND}^{3}})}^{0.093} {(\frac{µ_{c}}{µ_{d}})}^{0.246} {(\frac{Δ normalρ}{{normalρ}_{normald}})}^{- 2.4} {(\frac{{ND}^{2} ρ_{d}}{{normalμ}_{normald}})}^{- 0.63} {(\frac{σ}{{NDμ}_{normald}})}^{0.456}

…”

Section: Resultsmentioning

confidence: 99%

Effects of silica nanoparticles on the mean drop size and drop‐size distribution in a Scheibel extraction column

Houshyar

Torab‐Mostaedi

Mousavi

et al. 2017

Asia-Pacific J Chem Eng

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In this study, the effect of hydrodynamic parameters such as rotor speed, dispersed phase velocity, continuous phase velocity on the drop size distribution and the Sauter mean-drop diameter (d 32 ) were studied in the absence and presence of silica nanoparticles with the different weight fraction of them (0.01, 0.03 and 0.05 wt%) in a Scheibel extraction column. The experiment was conducted in a toluene/water system, and the results indicated that the effect of the rotor speed on the Sauter mean-drop diameter was far more significant than the effect of the dispersed and continuous phase velocities. Also, the effects of the hydrodynamic parameters are more significant in lower concentration of silica nanoparticles. The log-normal probability distribution function was used to predict the drop-size distribution. Furthermore, some correlations were presented to anticipate the parameters of this function and the mean drop size in terms of the operating parameters and the physical properties of the systems. These equations conformed well to the empirical data. Figure 5. Effect of silica nanoparticles concentration on d 32 (V d = V c = 8.8 × 10 À4 (m/s)).

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Correlation of the Drop Size in a Modified Scheibel Extraction Column

Cited by 18 publications

References 12 publications

Prediction of Concentration Profiles in an L‐Shaped Pulsed Extraction Column

Prediction of Concentration Profiles in an L‐Shaped Pulsed Extraction Column

Effect of Structural Parameters on Drop Size Distribution in Pulsed Packed Columns

Effects of silica nanoparticles on the mean drop size and drop‐size distribution in a Scheibel extraction column

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