Characterization of Milli- and Microflow Reactors: Mixing Efficiency and Residence Time Distribution

Gobert, Sven; Kuhn, Simon; Braeken, Leen; Thomassen, Leen

doi:10.1021/acs.oprd.6b00359

Cited by 99 publications

(118 citation statements)

References 45 publications

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“…RTD curves from an ideal CSTR and plug flow reactors are also shown in this figure as a reference. The simulated E– θ curve indicates the presence of chaotic and oscillatory flow, which is quite different from the response seen for the non‐oscillating passive mixers . Dispersion numbers estimated from the simulated RTD curves as a function of Re are shown in Figure b.…”

Section: Resultsmentioning

confidence: 82%

Flow, mixing, and heat transfer in fluidic oscillators

et al. 2018

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There is an increasing emphasis on process intensification and development of compact, intensified reactors and separators in recent years. Significant efforts are being made to develop such intensified reactors and separators without any moving parts. Some of the recent research studies have proven that a liquid‐liquid extractor based on the Coanda effect and feedback oscillations exhibit excellent mixing and liquid‐liquid contacting. These fluidic oscillators can potentially be used for a variety of other multiphase reactions and systems demanding enhanced mixing and heat and mass transfer. In this work, we have computationally investigated flow, mixing, and heat transfer in fluidic oscillators based on the Coanda effect. Available information on flow and mixing in fluidic oscillators was critically reviewed and key gaps in the available knowledge with respect to the design and optimization of fluidic oscillators were identified. Computational flow models were developed to characterize key flow features like unsteady flows, secondary vortices, and internal recirculation over a range of Reynolds number (Re = 90–1538) for three different oscillator designs. Systematic numerical studies were carried out to quantify different flow regimes, oscillations, and the influence of key geometric parameters on flow, mixing, and heat transfer. Simulated results were critically analyzed and are presented in the form of dimensionless numbers. The approach and results presented in this work will provide useful insights and a systematic basis for extending the applications of the Coanda‐based feedback oscillatory devices for a wide range of engineering applications.

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Section: Resultsmentioning

confidence: 82%

Flow, mixing, and heat transfer in fluidic oscillators

et al. 2018

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“…An estimation of the mixing times of milli‐ and micro‐scale flow reactors has been reported . The mixing time of the Y‐shaped mixer with 2.4‐mm and 4.8‐mm tubes at Re of 80 and 160, respectively, were at the order of 1 × 10 −2 s. It is assumed that the mixing time in this study is comparable to those reported in the article.…”

Section: Resultsmentioning

confidence: 83%

Process Intensification of Living Cationic Polymerization of Isobutylene by a Flow Reaction System

et al. 2019

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Increasing the reaction temperature of the living cationic polymerization of isobutylene is crucial for industrial production due to the cost of refrigeration. The reaction temperature increase was achieved with an accelerated reaction rate using a flow reaction system. The polymerization conditions, including the flow reactor design, were based on the results of kinetic studies. Utilizing a milli‐scale flow reactor, polyisobutylene, which has a narrow molecular weight distribution, was obtained within a considerably short residence time at a high temperature. Furthermore, it was confirmed that the value of Mw/Mn correlates with the product of the Reynolds number and the angle of collision.

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“…Another approach is scale‐up by increasing the characteristic dimensions resulting in milli‐scale reactors . These milli‐scale reactors can also be integrated with microstructures, which offers a promising scale‐up approach as it combines their throughput with the advantages of microstructured reactors.…”

Section: Introductionmentioning

confidence: 99%

Structured Porous Millireactors for Liquid‐Liquid Chemical Reactions

Potdar

Thomassen

Kuhn

2019

Chemie Ingenieur Technik

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Milli‐scale reactors with an integrated microstructure offer a promising scale‐up approach for conventional microreactors. This study applies 3D‐printed structured porous millireactors to industrially relevant liquid‐liquid reactions. The underlying transport mechanisms are identified by quantifying interfacial heat and mass transfer. The structured reactors perform limited in Taylor flow compared to a packed‐bed reactor due to limited interfacial mass transfer. However, in stratified flow, their productivity increases significantly at a fraction of the pressure drop of a packed bed.

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Characterization of Milli- and Microflow Reactors: Mixing Efficiency and Residence Time Distribution

Cited by 99 publications

References 45 publications

Flow, mixing, and heat transfer in fluidic oscillators

Flow, mixing, and heat transfer in fluidic oscillators

Process Intensification of Living Cationic Polymerization of Isobutylene by a Flow Reaction System

Structured Porous Millireactors for Liquid‐Liquid Chemical Reactions

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