Mixing processes in a 3D printed large-flow microstructured reactor: Finite element simulations and experimental study

Li, Xiteng; Jiang, Fengjian; Ravindra, A. V.; Zhou, Junwen; Zhou, Ao; Le, Thiquynhxuan; Peng, Jinhui; Ju, Shaohua

doi:10.1016/j.cej.2019.03.187

Cited by 13 publications

(13 citation statements)

References 34 publications

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“…These influencing factors would lead to an unexpected behavior during FDM 3D printing. Here, finite element simulation (FES) was used to solve the above issue due to its strong capability to predict the melt flow behavior in a complex channel through a computational fluid dynamics program . The shear rate distribution of melts in the whole printing channel is shown in Figure a.…”

Section: Resultsmentioning

confidence: 99%

“…Here, finite element simulation (FES) was used to solve the above issue due to its strong capability to predict the melt flow behavior in a complex channel through a computational fluid dynamics program. 44 The shear rate distribution of melts in the whole printing channel is shown in Figure 7a. It was clearly observed that the shear rate distribution was uniform from the inlet to the outlet.…”

Section: Methodsmentioning

confidence: 99%

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Preparation of Highly Efficient Electromagnetic Interference Shielding Polylactic Acid/Graphene Nanocomposites for Fused Deposition Modeling Three-Dimensional Printing

Shi

Peng

Jing

et al. 2020

Ind. Eng. Chem. Res.

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Herein, a novel local enrichment strategy (LES) was proposed to fabricate functional polylactic acid (PLA)/graphene nanoplatelet (GNP) nanocomposites for fused deposition modeling (FDM) three-dimensional (3D) printing by precisely manipulating the selective distribution of fillers. Experimental results showed that the PLA/GNP nanocomposites prepared using the LES method exhibited higher electrical conductivity and electromagnetic interference (EMI) shielding properties than those prepared using the conventional melt-compounding method. Particularly for EMI properties, the shielding efficiency (SE) of an LES sample prepared at 6 and 10 wt % GNPs reached 21.7 and 34.7 dB, respectively, which is an improvement of over 45% compared with the conventional ones. In addition, based on the theoretical analysis of shear field and the experimental verification of filler distribution after printing, a functional 3D printed honeycomb-like part with a porous structure, light weight, and highly efficient EMI shielding properties was successfully fabricated using the FDM 3D printing technology. A new strategy was accordingly established by manipulating the filler distribution to prepare functional filaments and parts for EMI shielding applications in this innovative study.

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Preparation of Highly Efficient Electromagnetic Interference Shielding Polylactic Acid/Graphene Nanocomposites for Fused Deposition Modeling Three-Dimensional Printing

Shi

Peng

Jing

et al. 2020

Ind. Eng. Chem. Res.

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“…According to the hydrodynamic literature, macroscale flow studies have characterized the generation of recycling around continuous or discontinuous obstacles and wall discontinuities. In mixing chambers 2 and 3, the reflux and the cutting effect of water chestnut caused by the resistance of the wall make the fluid form chaotic flow in the chamber, which not only realizes the effective mixing of the two‐phase fluid, but also avoids the stratification of two‐phase fluid through chaotic mixing 14 …”

Section: Methodsmentioning

confidence: 99%

“…Therefore, developing an extraction device adaptable to the complex working conditions of the metallurgical industry that demonstrates high extraction rate and large processing capacity is urgently required. These problems can be addressed by combining the emerging technology of 3D printing, which is controlled by a mathematical model designed by a computer, and converting it into a complex three‐dimensional solid model 14 …”

Section: Introductionmentioning

confidence: 99%

Miniaturized application of 3D‐printed large‐flow microreactor in extraction and separation of platinum, palladium and rhodium

Liu

et al. 2021

J of Chemical Tech & Biotech

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Problems of long extraction time, large footprint, low single‐stage extraction efficiency, and complicated production processes in solvent extraction equipment in recycling of modern industrial precious metal waste liquids are addressed and application of miniaturized equipment to hydrometallurgy is proposed in this study. A 3D‐printed multichannel microfluidic reactor will likely replace traditional extraction equipment. The reactor was applied to experiments concerning tributyl phosphate extraction and separation of platinum, palladium and rhodium precious metal ions in a hydrochloric acid system. Results showed that, under the conditions of a ratio of 1:1 and a flow rate of 192.5 mL min‐1 (processing capacity of 1.5L h‐1), the extraction rates of platinum and palladium are 84.26% and 96%, and the separation coefficient is βPt/Rh and βPd /Rh is 132.35 and 753.5,moreover, the optimized extraction rate of platinum and palladium in the reactor increases by 2% and 1%, respectively. Hence, the extraction effect of this reactor is better than conventional industrial single‐stage extraction (extraction time 12min, platinum extraction rate 87.43%, palladium extraction rate 90.86%, separation coefficients βPd/Rh and βPt/Rh are only 65.3 and 45.7). In summary, compared with conventional extraction, microreactor extraction can increase the separation coefficient, shorten the extraction time, and the total processing capacity can reach the industrial production level. In addition, this study also discussed the influence of microreactor structure optimization on the extraction effect. © 2020 Society of Chemical Industry

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“…Therefore, in the design of the reactor, the cross-sectional area of the microchannel should be reduced as much as possible, the length of the microchannel should be increased and the gas-liquid phase should be separated by a sieve plate, which is more conducive to the reaction. According to a numerical simulation, the serrated microchannel forms a microvortex when fluid passes through (gas or liquid); thus, the researchers designed the microchannel in the reactor as a serrated microchannel [36]. To achieve a larger capacity of the reaction, they used the parallel method (i.e., using a large number of microchannels with the same structure for stacking) to scale up the design of the microchannel reactor, which has laid the foundation for the further industrial application of the wet nitrogen oxide removal technology of microchannel reactors.…”

Section: Microchannel Reactor Design and 3d Printingmentioning

confidence: 99%

3D Printing Multi-Channel Large Volume Microchannel Reactor for Enhanced Removal of Low-Concentration NOx Flue Gas

Han

Zhou

et al. 2023

Processes

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Compared with conventional reactors that are designed by traditional micromachining technology, the use of 3D-printing technology to manufacture multichannel large-volume microchannel reactors as reaction equipment to remove low-concentration NOX by the wet method is simple and convenient, and the processing cost is low. The results showed that when the concentration of NO was 400 ppm, the mixed solution of (NH2)2CO mass fraction of 3% and H2O2 concentration of 0.5 mol/L was used, and the flow rates of gas and liquid were 100 mL/min, respectively, under the experimental conditions of pH = 11, solution temperature of 20 °C and 500 mL solution recycling for 20 min, the best removal effect of NOX was achieved, and the removal efficiency was 100%. When the O2 content in the flue gas was increased and the number and length of microchannels were increased, the NOX removal efficiency increased accordingly, which was conducive to the rapid and efficient reaction. The application of the microchannel reactor presents a new method for improving the air quality and reducing environmental pollution in the future.

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Mixing processes in a 3D printed large-flow microstructured reactor: Finite element simulations and experimental study

Cited by 13 publications

References 34 publications

Preparation of Highly Efficient Electromagnetic Interference Shielding Polylactic Acid/Graphene Nanocomposites for Fused Deposition Modeling Three-Dimensional Printing

Preparation of Highly Efficient Electromagnetic Interference Shielding Polylactic Acid/Graphene Nanocomposites for Fused Deposition Modeling Three-Dimensional Printing

Miniaturized application of 3D‐printed large‐flow microreactor in extraction and separation of platinum, palladium and rhodium

3D Printing Multi-Channel Large Volume Microchannel Reactor for Enhanced Removal of Low-Concentration NOx Flue Gas

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