Experimental Validation of the Performance of a Microreactor for the High-Throughput Screening of Catalytic Coatings

Mies, M.J.M.; Rebrov, Evgeny V.; Deutz, L.; Kleijn, Chris R.; Croon, M.H.J.M. de; Schouten, J.C.

doi:10.1021/ie061081w

Cited by 26 publications

(13 citation statements)

References 30 publications

(56 reference statements)

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“…Furthermore, the results of the CFD simulations were verified by measuring flow distribution at the outlets of the downstream channels by laser Doppler anemometry (LDA) as described elsewhere. 16 The experimental results showed good agreement with numerical results for a wide range of Re numbers.…”

Section: à6supporting

confidence: 68%

Header design for flow equalization in microstructured reactors

et al. 2006

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in Wiley InterScience (www.interscience.wiley.com).To enhance the uniformity of fluid flow distribution in microreactors, a header configuration consisting of a cone diffuser connected to a thick-walled screen has been proposed. The thick-walled screen consists of two sections: the upstream section constitutes a set of elongated parallel upstream channels and the downstream section constitutes a set of elongated parallel downstream channels positioned at an angle of 908 with respect to the upstream channels. In this approach the problem of flow equalization reduces to that of flow equalization in the first and second downstream channels of the thick-walled screen. In turn, this requires flow equalization in the corresponding cross sections of the upstream channels. The computational fluid dynamics analysis of the fluid flow maldistribution shows that eight parallel upstream channels with a width of 300-600 mm are required per 1 cm of length for flow equalization. The length to width ratio of these channels has to be >15. The numerical results suggest that the proposed header configuration can effectively improve the performance of the downstream microstructured devices, decreasing the ratio of the maximum flow velocity to the mean flow velocity from 2 to 1.005 for a wide range of Reynolds numbers (0.5-10).

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Section: à6supporting

confidence: 68%

Header design for flow equalization in microstructured reactors

et al. 2006

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“…Depending on the design parameters, there exists an optimum value of parameter b, which provides the minimum flow nonuniformity below 0.2%. The approach has been successfully applied in the design of a header for uniform flow distribution in a downstream microstructured reactor [16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Design of a thick-walled screen for flow equalization in microstructured reactors

Rebrov

Ekatpure

Croon

et al. 2007

J. Micromech. Microeng.

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A systematic computational fluid dynamics (CFD) approach has been applied to design the geometry of the channels of a three-dimensional (thick-walled) screen comprising upstream and downstream sets of elongated channels positioned at an angle of 90° with respect to each other. Such a geometry of the thick-wall screen can effectively drop the ratio of the maximum flow velocity to mean flow velocity below 1.005 in a downstream microstructured reactor at low Reynolds numbers. In this approach the problem of flow equalization reduces to that of flow equalization in the first and second downstream channels of the thick-walled screen. In turn, this requires flow equalization in the corresponding cross-sections of the upstream channels. The validity of the proposed design method was assessed through a case study. The effect of different design parameters on the flow non-uniformity in the downstream channels has been established. The design equation is proposed to calculate the optimum values of the screen parameters. The CFD results on flow distribution were experimentally validated by Laser Doppler Anemometry measurements in the range of Reynolds numbers from 6 to 113. The measured flow non-uniformity in the separate reactor channels was below 2%.

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“…for different applications may need different optimal criterion (Mies et al, 2007;Al-Rawashdeh et al, 2013). The development a pertinent performance criterion for special unit operation, and the experimental validation of the optimization algorithm for an actual application are the directions of our ongoing work.…”

Section: Conclusion and Prospectsmentioning

confidence: 99%

Heuristic shape optimization of baffled fluid distributor for uniform flow distribution

Luo

Wei

Fan

et al. 2015

Chemical Engineering Science

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International audienceThis paper presents a CFD-based, heuristic evolutionary algorithm for shape design and optimization of baffled fluid distributor. In this algorithm, the baffle surface is firstly divided into numerous identical control areas (volumes), each control area having an orifice in the middle. Under the constraint of constant global porosity of the baffle, the algorithm adjusts the size distribution of orifices so as to approach identical mass flowrate passing through every control area. An automatic program is processed iteratively so that the baffle configuration evolves toward the optimized shape, providing a uniform flow distribution among parallel outlet channels.To illustrate the principles and procedure of this algorithm, a 2D example of baffled fluid distributor is introduced and tested. Numerical results show that this algorithm can successfully reach uniform flow distribution with a small pressure drop increase. Sensitivity analysis also shows that this algorithm is robust, effective, general and flexible compared to traditional arbitrary or empirical propositions. A parametric study of influencing design parameters on the performance of the algorithm is carried out in order to provide some design guidelines. Finally, the theoretical basis and essential steps for the extension of the current algorithm to tackle 3D problem are established. The easy implementation of this simply solution for the general fluid maldistribution problem demonstrates its promising application in real engineering field

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Experimental Validation of the Performance of a Microreactor for the High-Throughput Screening of Catalytic Coatings

Cited by 26 publications

References 30 publications

Header design for flow equalization in microstructured reactors

Header design for flow equalization in microstructured reactors

Design of a thick-walled screen for flow equalization in microstructured reactors

Heuristic shape optimization of baffled fluid distributor for uniform flow distribution

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