Ideal micromixing performance in packed microchannels

Su, Yuanhai; Chen, Guangwen; Yuan, Quan

doi:10.1016/j.ces.2011.03.024

Cited by 66 publications

(39 citation statements)

References 33 publications

(31 reference statements)

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“…It is well known that whenever fast reactions occur in reactors, the characteristic micromixing time (t m ) is in competition with the characteristic reaction time (t R ). When t m of reactants is comparable to t R , unequal molar ratios exists locally during the reaction and the reaction conversion is controlled by micromixing [39]. The micromixing time depends on hydrodynamic conditions and it only can be evaluated for each experiment using micromixing models.…”

Section: Effect Of Confluence Angle On Mixing Time (T M )mentioning

confidence: 99%

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LASP and Villermaux/Dushman protocols for mixing performance in microchannels: Effect of geometry on micromixing characterization and size reduction

Rahimi

Valeh-e-Sheyda

Parsamoghadam

et al. 2014

Chemical Engineering and Processing: Process Intensification

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Section: Effect Of Confluence Angle On Mixing Time (T M )mentioning

confidence: 99%

“…The reaction between iodide and iodate, coupled with a neutralization reaction, is one of the well-known parallel competing reactions namely the Villermaux/Dushman reaction. The reaction formula is described by the following scheme: [36][37][38][39].…”

Section: Micromixing Characterization In Villermaux-dushman Test Reacmentioning

confidence: 99%

LASP and Villermaux/Dushman protocols for mixing performance in microchannels: Effect of geometry on micromixing characterization and size reduction

Rahimi

Valeh-e-Sheyda

Parsamoghadam

et al. 2014

Chemical Engineering and Processing: Process Intensification

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“…They extended a method of using iodine/iodide reaction system together with IEM mixing model to study microreactors. The method has become very popular and since then frequently applied to examine all kinds of microreactors, see for example (Guo et al, 2013;Kashid et al, 2011;Su et al, 2011) and (Aubin et al, 2010;Kölbl et al, 2008;Panic et al, 2004) for earlier applications of Villermaux-Dushman reaction. Falk and Commenge (2010) have shown how to identify mixing time, and how to relate it to operating parameters such as Reynolds number of the flow and the specific power (dissipation of mechanical energy per unit mass of fluid).…”

Section: Microreactorsmentioning

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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“…This is a substantial increase, which results improved mass transfer characteristics for multiphase flow compared to a segmented flow regime. [44][45][46] The immiscible fluids flow into confined interstices at high flow rates. This causes an increased shear between the fluids and results in a good dispersion, resulting in higher mixing efficiency and mass transfer rates.…”

Section: Mass Transport Phenomenamentioning

confidence: 99%

“…This causes an increased shear between the fluids and results in a good dispersion, resulting in higher mixing efficiency and mass transfer rates. 47,48 A modified Reynolds number (RePB) can be identified, which is used to identify the boundaries of the different flow regimes in a packed-bed:…”

Section: Mass Transport Phenomenamentioning

confidence: 99%

Beyond Organometallic Flow Chemistry: The Principles Behind the Use of Continuous-Flow Reactors for Synthesis

Noël

Hessel

2015

Organometallic Flow Chemistry

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Flow chemistry is typically used to enable challenging reactions which are difficult to carry out in conventional batch equipment. Consequently, the use of continuous-flow reactors for applications in organometallic and organic chemistry has witnessed a spectacular increase in interest from the chemistry community in the last decade. However, flow chemistry is more than just pumping reagents through a capillary and the engineering behind the observed phenomena can help to exploit the technology's full potential. Here, we give an overview of the most important engineering aspects associated with flow chemistry. This includes a discussion of mass-, heat-, and photon-transport phenomena which are relevant to carry out chemical reactions in a microreactor. Next, determination of intrinsic kinetics, automation of chemical processes, solids handling and multistep reaction sequences in flow are discussed. Safety is one of the main drivers to implement continuous-flow microreactor technology in an existing process and a brief overview is given here as well. Finally, the scale-up potential of microreactor technology is reviewed.

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Ideal micromixing performance in packed microchannels

Cited by 66 publications

References 33 publications

LASP and Villermaux/Dushman protocols for mixing performance in microchannels: Effect of geometry on micromixing characterization and size reduction

LASP and Villermaux/Dushman protocols for mixing performance in microchannels: Effect of geometry on micromixing characterization and size reduction

Test Reactions to Study Efficiency of

Beyond Organometallic Flow Chemistry: The Principles Behind the Use of Continuous-Flow Reactors for Synthesis

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