Study Of Micromixing in a Stirred Tank Using a Rushton Turbine

Assirelli, Melissa; Bujalski, W.; Eaglesham, Archie; Nienow, Alvin W.

doi:10.1205/026387602321143390

Cited by 60 publications

(21 citation statements)

References 19 publications

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“…9 at e = 1.27 W kg Fig. 9 shows that position 4 c, situated at 1.04 times the radius of the Rushton turbine, has the lowest value of X Q , which is in accordance with literature [31]. The acid could be immediately dispersed and diluted by the strong turbulence generated in the impeller stream when the feed position was in the impeller discharge region.…”

Section: Investigation In Impeller Discharge Regionsupporting

confidence: 86%

“…As reported by Sharp and Adrian [30] and Assirelli et al [31], the region which had the highest e value was positioned at 1.04 times the radius of the Rushton turbine, near the blade tip in the single-phase systems. The values of X Q for different feeding points in the impeller discharge region are demonstrated in Fig.…”

Section: Investigation In Impeller Discharge Regionsupporting

confidence: 57%

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Micromixing of Solid‐liquid Systems in a Stirred Tank with Double Impellers

et al. 2013

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The effect of solid particles on micromixing has been studied using the competitive iodide/iodate reaction system in stirred, multi-impeller, solid-liquid systems. The influences of particle size, impeller speed, solid holdup, feed position, and energy input have been investigated. The change of the segregation index with the power input was more distinguishable only for the 450-600 lm particles as compared with the large ones, at the same solid holdups. Also, for the small ones, cloud formation was observed at a particle concentration of 12.1 wt %. However, the influence of larger particles of 1-1.25 mm on micromixing was negligible, though both energy input and solid loading were increased. Besides, the optimal feed position was identified, and multiple feeds were also explored.

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Section: Investigation In Impeller Discharge Regionsupporting

confidence: 86%

Section: Investigation In Impeller Discharge Regionsupporting

confidence: 57%

Micromixing of Solid‐liquid Systems in a Stirred Tank with Double Impellers

et al. 2013

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“…(1)-(3) below, was implemented in this work. This well-established reaction scheme is widely documented in the literature as a model reaction to characterize micromixing [11][12][13][14][15][16]. The micromixing experiments were carried out using the reactant concentrations listed in Tab.…”

Section: Test Reactionmentioning

confidence: 99%

Micromixing Characteristics in a Small‐Scale Spinning Disk Reactor

Boodhoo

Al-Hengari

2012

Chem Eng & Technol

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Thin films formed under high acceleration fields in a spinning disk reactor (SDR) are characterized by high shear rates and intense surface ripples which are known to play an important role in improving the selectivity, yield, and final product quality in many mixing-dependent processes. The micromixing efficiency of a small-scale SDR of 10 cm disk diameter for a range of hydrodynamic conditions by means of the iodide-iodate test reaction is determined. Under optimized conditions, the SDR exhibits a better micromixing performance than the mechanically stirred vessel and other continuous intensified reactors, such as the rotating packed bed, when processing water-like fluids at the highest investigated flow rate of 5 mL s -1 . These results highlight the potential of the SDR as an alternative intensified mixer/reactor for processes where a high degree of mixing is desirable.A schematic representation of the small-scale SDR used in this study is given in Fig. 1. The stainless-steel disc of 10 cm in diameter was driven by a 125 W electric motor. The rotational speed was controlled by a digital speed controller in the range

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“…Among those are the concentration of the acid injected, 2,4 the acid feed point, 2,4,5 the acid feed time, 2,4 the geometry of the mixing accessory, 4 and the stirrer speed. 2,[4][5][6] Later, the reaction scheme was applied for characterizing mixing in continuous flow devices, 7 where two flows were combined in the device in a flow ratio of 1:1. One feed contained sulfuric acid in a rather low concentration; the other feed contained the other reactants.…”

Section: The Iodide Iodate Reaction Methodsmentioning

confidence: 99%

On the use of the Iodide Iodate Reaction Method for assessing mixing times in continuous flow mixers

Kölbl

Kraut

2011

AIChE Journal

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It is demonstrated experimentally by example of simple, commercially available T‐junctions and by ”unsymmetrical” V‐type micromixers that mixing times cannot be derived by applying the Iodide Iodate Reaction Method without considering the specific mixer geometry. Experimental results differ depending on the orientation of the feeds with respect to the inlets. An explanation for the observed effects is suggested. © 2010 American Institute of Chemical Engineers AIChE J, 2011

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Study Of Micromixing in a Stirred Tank Using a Rushton Turbine

Cited by 60 publications

References 19 publications

Micromixing of Solid‐liquid Systems in a Stirred Tank with Double Impellers

Micromixing of Solid‐liquid Systems in a Stirred Tank with Double Impellers

Micromixing Characteristics in a Small‐Scale Spinning Disk Reactor

On the use of the Iodide Iodate Reaction Method for assessing mixing times in continuous flow mixers

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