Microreactor synthesis of nanosized particles: The role of micromixing, aggregation, and separation processes in heterogeneous nucleation

Абиев, Р. Ш.; Al’myasheva, O. V.; Попков, В.И.; Проскурина, О. В.

doi:10.1016/j.cherd.2021.12.003

Cited by 20 publications

(11 citation statements)

References 71 publications

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“…18,19 The large specific surface area, good micromixing performance, and high mass/heat transfer efficiency make them versatile reactors for many fields, such as nanoparticle preparation, 20−22 polymerization, 23 and chemical synthesis. 19,21,22 However, the absence of external mechanical energy input in microreactors leads to underdeveloped turbulence and limited chaotic advection, consequently compromising micromixing efficiency. To address this limitation, researchers have introduced external forces such as ultrasonic vibration, 24,25 gas agitation, 26−28 pressure pulses, 29 magnetic fields, 30 and the rotating flow field to intensify micromixing.…”

Section: Introductionmentioning

confidence: 99%

“…To achieve proper molecular-level micromixing, researchers have explored various reactors, including microchannel reactors/mixers, microreactors with impinging jets and swirled flows, − rotating packed bed, helical tube reactor, dynamic inline rotor–stator mixer, gas–liquid vortex reactor, and rotor–stator spinning disk reactor . Among these, microchannel reactors, featured by dimensions ranging from several hundred micrometers to several millimeters, have garnered significant attention from both industry and academia. , The large specific surface area, good micromixing performance, and high mass/heat transfer efficiency make them versatile reactors for many fields, such as nanoparticle preparation, − polymerization, and chemical synthesis. ,, However, the absence of external mechanical energy input in microreactors leads to underdeveloped turbulence and limited chaotic advection, consequently compromising micromixing efficiency. To address this limitation, researchers have introduced external forces such as ultrasonic vibration, , gas agitation, − pressure pulses, magnetic fields, and the rotating flow field to intensify micromixing .…”

Section: Introductionmentioning

confidence: 99%

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Micromixing in a Novel Microannular Rotating Bed

Zhang,

Xue,

Liu

et al. 2024

Ind. Eng. Chem. Res.

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Microchannel reactors have garnered significant attention in various chemical processes due to their ability to achieve rapid mixing. However, there remains ample opportunity for the development of microchannel reactors with simple structures and high throughput. In this work, we propose a novel microannular rotating bed (MARB) that integrates the high-gravity field and microscale effect to enhance the micromixing efficiency. The Villermaux−Dushman reaction system is employed to investigate the influence of the operating parameters on the mixing performance. The micromixing time of the MARB ranges from 10 −4 to 10 −3 s for low-viscosity Newtonian fluids and from 10 −4 to 10 −2 s for shear-thinning non-Newtonian fluids. In a lab-scale setup, the MARB demonstrates a throughput of 6 L/min, markedly surpassing the capabilities of the existing microchannel reactors. Furthermore, the evaluation of energy dissipation rate underscores the MARB's remarkable energetic efficiency in intensifying mixing processes. The MARB, with its simple design, high throughput capacity, and efficiency, presents a promising alternative for the intensification of mixing across diverse chemical applications.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Micromixing in a Novel Microannular Rotating Bed

Zhang,

Xue,

Liu

et al. 2024

Ind. Eng. Chem. Res.

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“…16−24 Compared with conventional batch processes, the approach of using microreactors can synthesize nanoparticles with narrow particle size distribution (PSD) and high reproducibility due to the precise control of experimental variables (e.g., concentration and temperature) in the small dimensions of microreactors. 25,26 However, most of the studies were focused on ordered microreactors (i.e., lamination flow 27 and segmented flow 28 microreactors). For the lamination flow microreactors, 29 the fluids usually flow side by side in a continuous mode, and mixing efficiency is relatively low due to the mass transfer being dominated by molecular diffusion.…”

Section: Introductionmentioning

confidence: 99%

Structure Screening of Oscillating Feedback Microreactors for the High-Throughput Synthesis of Zeolitic Imidazolate Framework-67 Nanoparticles with Controlled Size and Morphology

Chen,

Zhang,

Gao

et al. 2024

Ind. Eng. Chem. Res.

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The relationship between the flow pattern evolution and performance of oscillating feedback microreactors (OFMs) for the synthesis of ZIF-67 nanoparticles was investigated by a photomicrography technique. Accordingly, an oscillating feedback microreactor (OFM) with an optimized structure was identified for high-throughput ZIF-67 production. By varying the experimental conditions (i.e., flow rate, aging time, precursor concentration [Co 2+ ], solvent, and cobalt source), the average size of ZIF-67 products can be adjusted (from 16 to 294 nm) with narrow particle size distribution (geometric standard deviation: 1.08−1.14) as well as with controllable morphology (sphere or rhombic dodecahedron). The maximum total flow rate can reach 160 mL/min, indicating that a highthroughput synthesis of ZIF-67 is achieved. The screening method can be extended to optimize other microreactors, and the resulting OFMs can be applied to produce other kinds of nanoparticles.

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“…However, obtaining single-phase nanocrystalline powders based on bismuth orthoferrite still causes difficulties [28,[36][37][38][39][40]. One of the ways to obtain oxide nanoparticles with a given composition and size is the use of microreactors [41,42].…”

Section: Introductionmentioning

confidence: 99%

Influence of using different types of microreactors on the formation of nanocrystalline BiFeO3

Проскурина¹,

Абиев²,

Неведомский³

2023

Nanosystems: Phys. Chem. Math.

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The influence of the coprecipitation of bismuth and iron hydroxides in microreactors of various types on the formation of nanocrystalline bismuth orthoferrite during the heat treatment of the deposit was described. Free impinging-jets microreactor, microreactor with submerged jets, microreactor with intensively swirling flows were used. It was revealed that nanocrystalline bismuth orthoferrite with the smallest weighted average crystallite size of 12 nm is formed when a microreactor with tangentially swirling flows of reagent solutions is used for coprecipitation of hydroxides. The minimum size of BiFeO 3 crystallites according to transmission electron microscopy data is determined as 3-4 nm. KEYWORDS free impinging-jets microreactor, microreactor with submerged jets, microreactor with intensively swirling flows, nanocrystals, bismuth ferrite.

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Microreactor synthesis of nanosized particles: The role of micromixing, aggregation, and separation processes in heterogeneous nucleation

Cited by 20 publications

References 71 publications

Micromixing in a Novel Microannular Rotating Bed

Micromixing in a Novel Microannular Rotating Bed

Structure Screening of Oscillating Feedback Microreactors for the High-Throughput Synthesis of Zeolitic Imidazolate Framework-67 Nanoparticles with Controlled Size and Morphology

Influence of using different types of microreactors on the formation of nanocrystalline BiFeO3

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