Design and optimization of electrochemical microreactors for continuous electrosynthesis

Renault, Cyril; Rajendran, Jerome; Ciumag, Mihaela Raluca; Tzedakis, Théodore; Colin, Stéphane; Serrano, Karine Groenen; Reynes, Olivier; André-Barrès, Christiane; Winterton, Peter

doi:10.1007/s10800-012-0445-x

Cited by 13 publications

(20 citation statements)

References 6 publications

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“…Note that a continuous tapered model may also be designed, as shown in Figure 2b, linearization leads to an approximate trapezoidal shape for the distributor and collector, with an inclined angle (θ) of about 11.3°. This value is close to the theoretical optimal angle (10.46°) proposed by the model of Renault et al (2012). Numerical tests were performed for both models, i.e.…”

Section: Geometry Of the Tested Mini-channel Arraysupporting

confidence: 72%

Numerical study on the improvement of flow distribution uniformity among parallel mini-channels

Pistoresi

Fan

Luo

2015

Chemical Engineering and Processing: Process Intensification

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Parallel micro or mini-channels are widely used in various devices of process and energy engineering including microreactors, compact heat exchangers and fuel cells. Nevertheless, the flow maldistribution due to the improper design of distributor/collector is usually observed, leading to globally poor performances of these devices. The objective of this study is to optimize the shape of the distributor/collector pipes so as to achieve a uniform flow distribution among an array of parallel minichannels. A Z-type ladder fluid network with 10 mini-channels in parallel having square section is introduced and investigated. Two methods are used to optimize the shape of distributor/collector pipes: a discrete stairway shape optimized according to the scaling relations proposed by Tondeur et al. (2011) and a continuous tapered shape with the inclined angle varying from 0° to 30°. 3D-CFD simulations are carried out using the ANSYS FLUENT code. Numerical results obtained show that a relatively uniform flow distribution may be reached by the discrete stairway shape or by the linear tapered shape under very low flow-rate conditions. Larger inclined angle or fewer channels in parallel are favorable for more uniform flow distribution under higher flow-rate conditions. Nevertheless this implies that the distributor and the collector pipes occupy a large volume so that the entire device is less compact.

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Section: Geometry Of the Tested Mini-channel Arraysupporting

confidence: 72%

Numerical study on the improvement of flow distribution uniformity among parallel mini-channels

Pistoresi

Fan

Luo

2015

Chemical Engineering and Processing: Process Intensification

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“…[140,180] To prevent selfheating a device, immersion into a water tank or water bath with a well-controlled temperature is suggested by Ye et al [57] Besides, a copper heat exchanger can also be used to control the temperature. [181] Similar to temperature, the pH gradients can influence the operation of electrochemical microfluidic devices, however it is not always a concern for electrochemical detectors working at low currents. Therefore, the investigation and modulation of pH is always expected but only attempted by a few experimenters.…”

Section: Control Of Pressure Temperature and Phmentioning

confidence: 99%

Design of Electrochemical Microfluidic Detectors: A Review

Díaz-Real

Holm

2021

Adv Materials Technologies

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Miniaturized electrochemical systems integrated into microfluidic flow devices have been an active research field the last couple of decades. This has resulted in many advanced microfluidic platforms for the conversion and detection of chemicals. The development is partly driven by the increased access to and decreased cost of fabrication. In the design of microfluidic electrochemical cells, several aspects need to be handled, such as the accurate control of potential, electrolyte flow, pH, pressure, and temperature. This can be further complicated by integrating photon traffic for spectro(electro)chemical detection. Here, a comprehensive review of recent advances and approaches to the design of microfluidic flow devices for detection is presented, first dealing with the design of electrodes and flow pathways, then highlighting some common challenges and how these have been dealt with in the literature. This work aims to be a guide for researchers in the design of microfluidic electrochemical systems for detection of chemical species.

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“…In 2012 Tzedakis et al designed an undivided microreactor to effectively run thermodynamically unfavourable electrosynthesis. 42,43 The multichannel conguration was equipped with a heat exchanger to either supply heat to endothermic reactions or to rapidly remove heat produced in exothermic reactions. A network structure was also imparted into the design for optimal residence time distributions (Fig.…”

Section: Reactors With Chip-type Congurationmentioning

confidence: 99%