Micromixing in a Rotor–Stator Spinning Disc Reactor

Martínez, AN Arturo Manzano; Eeten, Kmp Kevin van; Schouten, JC Jaap; Schaaf, J. van der

doi:10.1021/acs.iecr.7b01324

Cited by 54 publications

(38 citation statements)

References 34 publications

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“…Finally, certain concentrations of borate (0.1818 mol/L), sodium hydroxide (0.0909 mol/L), iodide (0.011 67 mol/L), and iodate ions (0.002 33 mol/L) were achieved in solution A by adding deionized water. Solution B is a perchloric acid solution instead of the commonly used sulphuric acid solution owing to the fact that sulphuric acid cannot fully dissociate throughout the whole mixing process, and H + concentrations were determined, ranging from 1.0–0.6 mol/L . The physical properties such as viscosity and surface tension of solution A and B are 1.003 mPa · s and 72.5 mN/m, which are similar to those of water due to the low concentration of these chemical agents.…”

Section: Methodsmentioning

confidence: 99%

Micromixing efficiency in a multiphase reactor with a foam block stirrer

Yang

et al. 2019

Can J Chem Eng

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A rotating foam reactor (RFR), which comprises a solid foam block stirrer as opposed to the agitator blade in stirred tanks, has recently received a significant amount of research interest due to its high mass transfer rates. For a deeper insight into the RFR the work herein investigated the micromixing efficiency of the RFR in terms of segregation index (X s ) using the iodide-iodate reaction system. The effects of various operating parameters including injection time, rotational speed, acid concentration, volume of liquid, volumetric ratio, and gas flow rate on segregation index were systematically examined. Results showed that the segregation index remained constant when injection time exceeded 100 s. Moreover, the X s increased with an increase in acid concentration but decreased with an increase in rotational speed, volume of liquid, volumetric ratio, and gas flow rate. Micromixing time was also calculated based on the incorporation model and was established to range from 1.1 Â 10 À3 -4.5 Â 10 À2 s, which is much shorter than that of conventional reactors. The results herein demonstrate that an RFR exhibits excellent micromixing efficiency and has a significant potential for use in chemical industries.

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Section: Methodsmentioning

confidence: 99%

Micromixing efficiency in a multiphase reactor with a foam block stirrer

Yang

et al. 2019

Can J Chem Eng

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“…Unexpectedly, the smaller size leads to the higher efficient. This size‐dependent effect is likely to become new generation T 1 MRI contrast agents . With that, the tracking and assessing of transplanted neural stem cell in vivo and in situ become achievable.…”

Section: Imagingmentioning

confidence: 99%

Recent Progress of Nanomedicine in the Treatment of Central Nervous System Diseases

Feng

Wang

Xue

2020

Advanced Therapeutics

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Central nervous system (CNS) diseases, mainly including neurodegenerative diseases and psychiatric diseases, have become the leading cause of death and disability in the world today, which bring huge suffering to both patients and their families. Nanomedicine is an emerging and rapidly evolving discipline that mainly involves the application of nanoparticles in the diagnosis and treatment of various diseases. Although many challenges in the clinical application of nanomedicine still exist, the prospects for development cannot be ignored. Furthermore, better outcomes for patients with CNS diseases can be expected with the rapid development of nanotechnology in diagnosis and treatment. In the present review, an overview is given of the outstanding recent progress of nanomedicine from three aspects: drug delivery, imaging, and therapy in CNS diseases.

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“…A schematic representation of the rs-SDR is given in Figure 2. Dierent than in a previous publication, 6 for this study the experiments were carried out in semi-batch operation. A 5…”

Section: Micromixing Experimentsmentioning

confidence: 99%

An Alternative Kinetic Model of the Iodide-Iodate Reaction for Its Use in Micromixing Investigations

Martinez¹,

Haase²,

Assirelli³

et al. 2020

Preprint

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The Villermaux-Dushman method, one of the most extensively used test reaction systems for micromixing characterization, has been widely criticized for years due to uncertainties regarding the incomplete dissociation of sulfuric acid and the proposed kinetic study by Guichardon et al. In this work, a renewed study of the kinetics of the iodide-iodate reaction is presented, using perchloric acid to avoid issues concerning incomplete acid dissociation. The experimental results are in good agreement with the fifth order rate law for the iodide-iodate reaction. The reaction rate coefficient strongly depends on the ionic strength and can be modeled with a Davies-like equation. When implemented in the incorporation model, the kinetic model presented in this study can be used to estimate micromixing times that are in line with the theoretical engulfment time. This is observed in two different reactors with low and high intensity of mixing: an unbaffled stirred vessel and a rotor-stator spinning disc reactor. The results from the latter are also compared with the second Bourne reaction, giving very similar micromixing times. The use of sulfuric acid in combination with the kinetic model from Guichardon et al. also provides micromixing times of the same order of magnitude; presumably their kinetic model indirectly accounts for the second proton dissociation rate in the overall reaction rate coefficient. The kinetic model presented in this study in combination with perchloric acid is suggested as an alternative to characterize micromixing behavior. <pre><br><br></pre>

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Micromixing in a Rotor–Stator Spinning Disc Reactor

Cited by 54 publications

References 34 publications

Micromixing efficiency in a multiphase reactor with a foam block stirrer

Micromixing efficiency in a multiphase reactor with a foam block stirrer

Recent Progress of Nanomedicine in the Treatment of Central Nervous System Diseases

An Alternative Kinetic Model of the Iodide-Iodate Reaction for Its Use in Micromixing Investigations

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