Hydrodynamicst axial mixing and mass transfer in rotating disk contactors

Zhang, S. H.; Ni, Xiongwei; Su, Yuhang

doi:10.1002/cjce.5450590503

Cited by 38 publications

(18 citation statements)

References 24 publications

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“…In any case a detailed fundamental description of the hydrodynamics of agitated contactors is generally impracticable (Sarkar, Phillips and Mumford, 1980a;Zhang et al, 1981). There is in general a lack of understanding of the complex behaviour of drops in a dispersion.…”

mentioning

confidence: 99%

Characterization of hydrodynamic parameters in rotating disc and oldshue‐rushton columns. Hydrodynamic modelling, drop size, hold‐up and flooding

1985

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Flooding rates, dispersed phase hold-up, hold-up profile and drop-size distribution were investigated in rotating disc and Oldshue Rushton 0.10 m diameter, 18 compmment columns with toluene-water as the liquid-liquid system. The axial dispersed phase hold-up and the mean drop size in both contactors varied significantly with column height. The hold-up profiles were correlated by semi-theoretical models.

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mentioning

confidence: 99%

Characterization of hydrodynamic parameters in rotating disc and oldshue‐rushton columns. Hydrodynamic modelling, drop size, hold‐up and flooding

1985

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“…[21] The mass transfer coefficients have been of great interst in research into extraction columns, from single drop, [22][23][24][25][26] to droplet swarm, [27] A c c e p t e d M a n u s c r i p t to extraction columns, [28,29] as summarized by Kumar and Hartland. [30] Some of the correlations are listed in Table 2.…”

Section: Introductionmentioning

confidence: 99%

Axial Mixing and Mass Transfer Performance of an Annular Pulsed Disc-and-Doughnut Column

Liu

Jing

2015

Solvent Extraction and Ion Exchange

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The annular pulsed disc-and-doughnut column (APDDC) is an important type of extraction equipment in the PUREX process, which has been used in several commercial reprocessing plants. As there are few mass transfer experimental reported in the literature, the axial mixing and mass transfer performance of an APDDC was studied for both extraction and stripping processes in the present Two parameters in the axial dispersion model (ADM), namely, the axial dispersion coefficient of the continuous phase and the number of mass transfer units, were regressed by correlating ADM with experimental concentration profiles. The influence of flow rate and pulsation intensity on these parameters was also investigated. Models developed for the PDDC were tested for correlation with APDDC experimental data and suitable models and conditions were determined.A c c e p t e d M a n u s c r i p t height of a mass transfer unit was also calculated, which highlights the impact of axial mixing on mass transfer performance. Moreover, the influence of internal wettability on mass transfer performance was discussed.

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“…A mong various contacting devices used in liquid-liquid extraction operation, rotary disc contactor (RDC) gets preference on account of its high efficiency per unit height, high throughput, low driving power, low cost, and high operational flexibility comparing with conventional sieve plate, packed and spray columns (Laddha and Degaleesan, 1976;Zhang et al, 1981;Kamath and Subbu Rau, 1985). An important application of these contactors is in the petroleum industry for furfural and sulphur dioxide extraction, propane deasphalting, sulpholane extraction, and caprolactum purification (Laddha and Degaleesan, 1976).…”

Section: Introductionmentioning

confidence: 99%

Investigation on local and average static hold‐ups in liquid–liquid systems in a rotary disc contactor

et al. 2011

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A rotating disc contactor with inner diameter of 91 mm and 21 compartments was used to investigate local and average static hold-ups in the column. Three chemical systems, including distilled water as stagnant continuous phase and toluene, kerosene, and butyl acetate as dispersed phase, in case of no mass transfer, were applied. Different parameters consisting of drop size and static hold-up were measured experimentally under various operating conditions, and two dimensionless correlations for estimation of local static hold-up as a function of average mother drop size, physical properties, rotor speed, and stage number were proposed in two cases: (1) immovable and (2) rotating rotor discs. Furthermore, two dimensionless correlations were presented to estimate average static hold-up as a function of average mother drop size, physical properties, rotor speed, and number of stages in the column in the two aforementioned conditions. Un contacteur de disque rotatif avec un diamètre interne de 91 mm et 21 compartiments aété utilisé pourétudier les retenues statiques locales et moyennes dans la colonne. Trois systèmes chimiques, y compris de l'eau distillée comme phase continue stagnante et du toluène, du kérosène et de l'acétate de butyle comme phase dispersée, en cas d'aucun transfert de masse, ontété utilisés. Différents paramètres composés de la dimension des gouttes et la retenue statique ontété mesurés de façon expérimentale selon diverses conditions de fonctionnement et deux corrélations adimensionnelles pour l'estimation de la retenue statique locale comme fonction de la dimension de la goutte mère moyenne, des propriétés physiques, du régime rotor et du nombre d'étapes ontété proposées dans deux cas: (1) disques du rotor fixes et (2) rotatifs. De plus, deux corrélations adimensionnelles ontété présentées pour estimer la retenue statique moyenne comme fonction de la dimension de la goutte mère moyenne, des propriétés physiques, du régime rotor et du nombre d'étapes dans la colonne dans les deux conditions mentionnées précédemment.

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Hydrodynamicst axial mixing and mass transfer in rotating disk contactors

Cited by 38 publications

References 24 publications

Characterization of hydrodynamic parameters in rotating disc and oldshue‐rushton columns. Hydrodynamic modelling, drop size, hold‐up and flooding

Characterization of hydrodynamic parameters in rotating disc and oldshue‐rushton columns. Hydrodynamic modelling, drop size, hold‐up and flooding

Axial Mixing and Mass Transfer Performance of an Annular Pulsed Disc-and-Doughnut Column

Investigation on local and average static hold‐ups in liquid–liquid systems in a rotary disc contactor

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