Droplet break-up by in-line Silverson rotor–stator mixer

Hall, Steven R.; Cooke, Mike; El‐Hamouz, Amer; Kowalski, Adam

doi:10.1016/j.ces.2011.01.054

Cited by 99 publications

(71 citation statements)

References 28 publications

(60 reference statements)

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“…Inlet droplet size did not have a significant effect on outlet droplet size. Hall et al [15] observed that droplet sizes were of the same order of magnitude as the Kolmogorov length scale.…”

Section: Literature Reviewmentioning

confidence: 92%

“…Hall et al [15] used an inline mixer (Silverson 150/250 MS) to study droplet break-up. Impeller speeds were 3000À11 000 rpm.…”

Section: Literature Reviewmentioning

confidence: 99%

“…Minimum chord lengths were between 4À10 mm. Hall et al [15] found that observed drop sizes were as small as 2À3 mm, while the smallest observed droplet size in the experiments of Maa and Hsu [14] was 1 mm.…”

mentioning

confidence: 99%

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Mixing performance comparison of milliscale continuous high‐shear mixers

Tamminen

Koiranen

2015

Can J Chem Eng

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Mixing performance of two continuous flow millilitre-scale reactors (volumes 9.5 mL and 2.5 mL) equipped with rotor-stator mixers was studied. Cumulative residence time distributions (RTD) were determined experimentally using a step response method. Distributions were measured for both reactors by varying impeller speed and feed flow rate. The mixing effect was determined by measured RTDs. Computational fluid dynamics (CFD) were used to verify that the residence time distribution in the measurement outlet agreed with the outlet flow. The mixing power of both reactors was determined using a calorimetric method. The reactor inlet flow rate was found to affect mixing performance at 1-13 s residence times but the effect of impeller speed could not be noted. Both milliscale reactors are close to an ideal continuous stirred-tank reactor (CSTR) at the studied impeller speed and flow rate ranges. The specific interfacial area was found to depend on the reactor inlet flow rate at constant impeller speed for the case of copper solvent extraction.

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Section: Literature Reviewmentioning

confidence: 92%

“…Hall et al [15] used an inline mixer (Silverson 150/250 MS) to study droplet break-up. Impeller speeds were 3000À11 000 rpm.…”

Section: Literature Reviewmentioning

confidence: 99%

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Mixing performance comparison of milliscale continuous high‐shear mixers

Tamminen

Koiranen

2015

Can J Chem Eng

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“…This results from the fact that these devices are capable of delivering very high values of energy dissipation rates that are concentrated in some specific regions of the apparatus. As a result rotor-stator devices have found many applications in processes of industrial importance such as chemical, biochemical, agricultural, cosmetic and food processing for homogenisation, dispersion, emulsification, grinding, dissolving, chemical reaction, cell disruption, shear coagulation and many more (Atiemo-Obeng and Calabrese, 2004;Chu et al, 2007;Cooke et al, 2011;Hall et al, 2011aHall et al, , 2011bÖzcan-Taşkın et al, 2011;Schönstedt et al, 2015).…”

Section: Rotor-stator Mixing Devicesmentioning

confidence: 99%

“…However, rotorstators mixers are widely used, which includes the creation of emulsions a) b) Hall et al, 2011a;Hall et al, 2013;Jasińska et al, 2012;Jasińska et al, 2013b;Jasińska et al, 2013c;Jasińska and Bałdyga, 2014;Jasińska et al, 2014b) and suspensions (Bałdyga et al, 2008).…”

Section: Rotor-stator Mixing Devicesmentioning

confidence: 99%

Test Reactions to Study Efficiency of

Jasińska¹

2015

Chemical and Process Engineering

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Effects of mixing on the course of fast chemical reactions are relatively well understood, especially in homogeneous systems. This enables to design and operate chemical reactors with the goal to achieve a high yield of a desired product and use systems of complex reactions as a chemical probe (chemical test reactions) to identify progress of mixing and quality of mixture. Recently, a number of studies have focused on the application of chemical test reactions to identify energy efficiency of mixing, being a convenient way of comparing mixers and reactors in terms of their mixing efficiency. This review offers a presentation of chemical test reactions available in the literature and methods of applications of test reactions to identify the energy efficiency of mixing. Also methods to assess the extent of micromixing by measuring product distribution or segregation index, and to determine the time constant for mixing are presented for single phase homogeneous systems and two-phase liquid-liquid systems.

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