Prediction of drop size distribution in a horizontal pulsed plate extraction column

Khajenoori, Maryam; Asl, Ali Haghighi; Safdari, Jaber; Mallah, Mohammad Hassan

doi:10.1016/j.cep.2015.03.021

Cited by 29 publications

(22 citation statements)

References 19 publications

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“…Therefore, it is found that Equations (3)(4)(5) can cover the experimental data accurately in the region from the upper end of the mixer-settler regime to the dispersion regime. On the other hand, they showed poor performance in most of the mixer-settler regime, especially at the lower end of the mixer-settler regime and then became more accurate along the way.…”

Section: Prediction Of the Mean Drop Sizementioning

confidence: 99%

“…One of the recent correlations is proposed by Khajenoori et al [3] to estimate Sauter mean drop size in a horizontal pulsed sieve-plate column with a similar structure to the horizontal section of our setup. They give the following correlation: Figure 9 compares some of the experimental data of mean drop size in the horizontal section of the column with those calculated by Equation (6).…”

Section: Prediction Of the Mean Drop Sizementioning

confidence: 99%

“…[37] This situation can usually occur during the startup and shutdown of the column. The experimental and calculated drop diameters showed the highest deviation in the lower end of the mixer-settler regime, [54] Miyauchi and Oya [32] Khajenoori et al [3] Kleczek et al [55] Panahinia et al [56] Column dimension D [54] Miyauchi and Oya [32] Khajenoori et al [3] Kleczek et al [55] Panahinia et al [56] Continuous phase (c) reaching more than 40 %; however, in the dispersion regime, this deviation was less than 8 %.…”

Section: Prediction Of the Mean Drop Sizementioning

confidence: 99%

“…In order to evaluate the benefits of the application of an L-shaped extraction column in industrial applications, several experimental data are taken from the work of Kagan et al, [54] Miyauchi and Oya, [32] Khajenoori et al, [3] Kleczek et al, [55] and Panahinia et al, [56] which are among the studies conducted in standard vertical pulsed columns or horizontal extraction columns with almost similar operating conditions and column dimensions to the L-shaped column used in this research. Tables 6 and 7 present the operating and geometrical conditions for these investigations and physical properties of the systems used, respectively.…”

Section: Comparison Of Different Extraction Columnsmentioning

confidence: 99%

“…Therefore, this article also concerns the development of the predictive ability of some of the previous correlations (i.e. Khajenoori et al, [3] Kumar and Hartland, [16] and Sreenivasulu et al [17] ) for prediction of mean drop size in each section of the column for different operating regimes.…”

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confidence: 99%

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Drop behaviour characteristics in different operating regimes in an L‐shaped pulsed sieve‐plate column

Amani¹,

Esmaieli²

2017

Can J Chem Eng

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In this study, the influence of different operating regimes on drop behaviour in an L-shaped pulsed sieve-plate column has been investigated and the effects of pulsation intensity and phase superficial velocities on drop diameters are evaluated. The toluene-water system with 0.03 L/L (3 vol%) acetone as a mass transfer agent is used. Experimental observations reveal that with increasing pulsation intensity, drop sizes slightly decrease and by reaching to the end of mixer-settler regime, they significantly decrease followed by a mild decrease in the dispersion regime. Moreover, it is observed that mean drop size firstly varies inversely as both phase superficial velocities change, while it slightly increases with further increase in superficial velocities. Finally, some of the most recommended correlations are compared to the experimental data. It is revealed that these correlations show the highest deviation in the lower end of the mixer-settler regime (> 40 %), while in the dispersion regime it becomes < 15 %, indicating that they are only applicable in the region of practical regimes. Accordingly, two of these correlations are modified in order to cover different operating regimes by means of two correlations proposed to predict the transition regime in each section of the column. The AARE values of the modified correlations are found to be < 14.7 %.

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Section: Prediction Of the Mean Drop Sizementioning

confidence: 99%

Section: Prediction Of the Mean Drop Sizementioning

confidence: 99%

Section: Prediction Of the Mean Drop Sizementioning

confidence: 99%

Section: Comparison Of Different Extraction Columnsmentioning

confidence: 99%

mentioning

confidence: 99%

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Drop behaviour characteristics in different operating regimes in an L‐shaped pulsed sieve‐plate column

Amani¹,

Esmaieli²

2017

Can J Chem Eng

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Drop size correlation and population balance model for an agitated‐pulsed solvent extraction column

Tan

Lan

et al. 2020

AIChE Journal

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Agitated‐pulsed column (APC) is a newly designed extraction column with excellent mass transfer performance. In this work, Sauter mean drop diameter d32 and drop size distribution was investigated under different operation conditions in a 25 mm diameter APC. The results show that with an increase in pulsation intensity and agitation speed the drop size distribution is narrowed and d32 is decreased significantly. With increasing dispersed‐phase velocity, d32 increased and drop size distribution become narrow, while there was no noticeable change with continuous velocity. The cumulative size distribution was found to be predicted well using the Inverse Gaussian function. A new correlation was proposed to predict the experimental d32 data of the APC column used in this study. Furthermore, population balance model was applied to predict the drop size distribution with refitted parameters in the breakage, coalescence kernels functions.

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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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Prediction of drop size distribution in a horizontal pulsed plate extraction column

Cited by 29 publications

References 19 publications

Drop behaviour characteristics in different operating regimes in an L‐shaped pulsed sieve‐plate column

Drop behaviour characteristics in different operating regimes in an L‐shaped pulsed sieve‐plate column

Drop size correlation and population balance model for an agitated‐pulsed solvent extraction column

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

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