Laser rapid-prototyping and modular packaging of chip-based microreactors for direct fluorination reactions

Cichowski, Dawid; Zhang, Pengcheng; Woias, Peter; Krossing, Ingo; Cobry, Keith

doi:10.1016/j.cherd.2017.10.017

Cited by 4 publications

(3 citation statements)

References 49 publications

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“…Secondary flows increase convective mixing perpendicular to the main flow direction, providing a supplementary mechanism for diffusional mixing. This is the advantage of having a serpentine layout and T‐junctions on microreactors, and contemporary research has been exploring how to achieve better process conditions with such geometries …”

Section: Resultsmentioning

confidence: 99%

“…Among the techniques available for fabrication of microreactors with serpentine channels and T‐junctions, femtosecond laser ablation has been drawing attention because it allows machining of a variety of materials, including metals, glass, and ceramics . Mechanical micromachining and electric discharge machining wear out the equipment used in the process, while a focused ion beam machining is performed under vacuum; such techniques also require small etching velocities, not allowing fast prototyping .…”

Section: Introductionmentioning

confidence: 99%

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Analysis of a microreactor for synthesizing nanocrystals by computational fluid dynamics

et al. 2018

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Microreactors eliminate batch‐to‐batch variability and allow better control over nanocrystal synthesis. A serpentine microreactor fabricated by femtosecond laser ablation is presented and characterized by computational fluid dynamics, since the micro channels show a trapezoidal cross‐section mainly due to the relatively high numerical aperture of the focusing lens. Mixing, macro and micro, throughout the device was investigated for inlet flow rates between 10–500 μL min−1 and the injection of an inert tracer with the same transport properties of water. The simulation of the whole microreactor enabled the analysis of the formation and destruction of structures. For instance, secondary flows played a major role in mixing behaviour: small flow rates did not promote mixing of the tracer and a stream of pure water even after 43 curved segments, while they were perfectly mixed after 9 segments for higher flow rates. According to the mixing index, the maximum effect of convective mixing was achieved for an inlet flow rate of 250 μL min−1. Tracer dispersion and the mixing index guided a scale‐up process of the microreactor, optimizing the number of curved segments while increasing total throughput. The upscaled design exhibited mixing saturation at 400 μL min−1 and promoted better control of residence time to allow nanocrystal growth.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Analysis of a microreactor for synthesizing nanocrystals by computational fluid dynamics

et al. 2018

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“…Laser remanufacturing has attracted widespread attention because many of its advantages are important for high power density, rapid cooling rate, low dilution, and high metallurgical bonding to the substrate . Great effort has been devoted to date to improving mechanical properties of materials by optimizing parameters of the laser metal manufacturing process.…”

Section: Introductionmentioning

confidence: 99%

Effects of Carbon and Boron on Structure and Properties of Austenitic Stainless Steel Coatings Fabricated by Laser Remanufacturing

Chen

Qiu

et al. 2018

steel research int.

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The coatings are fabricated using austenitic stainless steel powder with various contents of carbon and boron via laser remanufacturing technique. A new synchronous lateral powder feeding device is adopted to avoid surface oxidation of molten pool. The authors find that the strength can be increased but plasticity is decreased of with the rise of boron content due to the formation of lamellar borides phase structures, which are very brittle and have high hardness. In addition, the authors also find that the tensile strength and hardness are enhanced by increasing the content of carbon, while the plasticity is deteriorated due to the formed carbide in the grain of the austenitic stainless steel coating.

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Influence of Organics Cladding Pretreatment on Microstructures and Properties of Austenitic Steel Coating via Laser Remanufacturing Technology

Chen

Qiu

2019

J. of Materi Eng and Perform

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Laser rapid-prototyping and modular packaging of chip-based microreactors for direct fluorination reactions

Cited by 4 publications

References 49 publications

Analysis of a microreactor for synthesizing nanocrystals by computational fluid dynamics

Analysis of a microreactor for synthesizing nanocrystals by computational fluid dynamics

Effects of Carbon and Boron on Structure and Properties of Austenitic Stainless Steel Coatings Fabricated by Laser Remanufacturing

Influence of Organics Cladding Pretreatment on Microstructures and Properties of Austenitic Steel Coating via Laser Remanufacturing Technology

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