Prediction of dispersed phase holdup in pulsed disc and doughnut solvent extraction columns under different mass transfer conditions

Wang, Yong; Smith, Kathryn H.; Mumford, Kathryn A.; Grabin, Teobaldo F.; Li, Zheng; Stevens, Geoffrey W.

doi:10.1016/j.cjche.2015.07.020

Cited by 19 publications

(2 citation statements)

References 10 publications

(29 reference statements)

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“…PBEs are effective modeling tools that are widely applied into the engineering field of dispersed media such as crystallization, biotechnologies, novel solvent extraction processes, and powder technologies. − To simplify a laboratory-scale batch crystallization process, a well-mixed crystallizer is generally assumed. This means the temperature and concentration throughout the crystallizer is the same at a given time.…”

Section: Modelmentioning

confidence: 99%

Precipitating Characteristics of Potassium Bicarbonate Using Concentrated Potassium Carbonate Solvent for Carbon Dioxide Capture. Part 2: Crystal Growth

Tao

et al. 2017

Ind. Eng. Chem. Res.

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Crystallization kinetics of potassium bicarbonate in the potassium carbonate (K 2 CO 3 )−potassium bicarbonate (KHCO 3 )−water (H 2 O) ternary solvent system were estimated using focused beam reflectance measurement (FBRM) in unseeded batch cooling experiments. Two groups of experiments including apparent K 2 CO 3 concentrations of 35 and 40 wt %, both with 0.4 loading, at different constant cooling rates were conducted. KHCO 3 was the only precipitate in the ternary system. The concentration of KHCO 3 measured by autotitration and chord length distribution collected from FBRM were used to estimate the parameters required for the primary nucleation, secondary nucleation, and growth rate models through mass balance, population balance using the method of moments, and least-squares minimization in MATLAB. The solubility of the ternary solvent system was successfully predicted using the regressed electrolyte nonrandom twoliquids (ENRTL) activity model in Aspen Plus. The crystallization of KHCO 3 was impacted by KHCO 3 supersaturation and K 2 CO 3 concentration. Primary nucleation was found to dominate the system including both homogeneous and heterogeneous nucleation, whereas secondary nucleation was inhibited to a great extent. The model developed was able to predict the average particle size within 20%, the results obtained from the model were consistent with the conclusion that primary nucleation dominates the K 2 CO 3 −KHCO 3 − H 2 O solvent system.

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Section: Modelmentioning

confidence: 99%

Precipitating Characteristics of Potassium Bicarbonate Using Concentrated Potassium Carbonate Solvent for Carbon Dioxide Capture. Part 2: Crystal Growth

Tao

et al. 2017

Ind. Eng. Chem. Res.

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“…Several studies have been reported on PDDCs in the open literature. Experimental studies on PPDC have been reported to quantify axial dispersion in single-phase flow , and two-phase flow. , Experimental studies focused on drop size, , slip velocity between continuous and dispersed phases, flooding conditions, , liquid–liquid mass transfer, , and dispersed phase holdup ,− have been reported. Studies on computational fluid dynamics (CFD) simulations are relatively few compared to the experimental studies on PDDCs.…”

Section: Introductionmentioning

confidence: 99%

CFD Modeling of Pulsed Disc and Doughnut Column: Prediction of Axial Dispersion in Pulsatile Liquid–Liquid Two-Phase Flow

Sarkar

Singh

Shenoy

2019

Ind. Eng. Chem. Res.

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Numerical simulations of liquid−liquid counter-current two-phase flow in pulsed disc and doughnut columns (PDDCs) are performed. The simulation methodology comprises two steps. In the first step, the Euler−Euler method is used to obtain turbulent two-phase flow field. Turbulence is simulated by using standard k-ε mixture model. The dispersed phase is assumed to be monodispersed. The second step comprises solution of species transport equation together with flow equations to obtain residence time distribution (RTD) of the continuous phase. The RTD is used to estimate the axial dispersion coefficient or Peclet number of the continuous phase. Experimental data of RTD for different operating conditions (pulsing velocity, dispersed phase velocity, continuous phase velocity) and different geometries (diameter of the column, spacing between the discs) are used for validation. Estimates of the Peclet number by the CFD model are better than the same obtained from previously reported empirical correlations.

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CFD simulation and experimental investigation of the copper solvent extraction in a pilot plant pulsed packed column in Sarcheshmeh Copper Complex

et al. 2016

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Prediction of dispersed phase holdup in pulsed disc and doughnut solvent extraction columns under different mass transfer conditions

Cited by 19 publications

References 10 publications

Precipitating Characteristics of Potassium Bicarbonate Using Concentrated Potassium Carbonate Solvent for Carbon Dioxide Capture. Part 2: Crystal Growth

Precipitating Characteristics of Potassium Bicarbonate Using Concentrated Potassium Carbonate Solvent for Carbon Dioxide Capture. Part 2: Crystal Growth

CFD Modeling of Pulsed Disc and Doughnut Column: Prediction of Axial Dispersion in Pulsatile Liquid–Liquid Two-Phase Flow

CFD simulation and experimental investigation of the copper solvent extraction in a pilot plant pulsed packed column in Sarcheshmeh Copper Complex

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