Tailoring the multiphase flow pattern of gas and liquid through micro-packed bed of pillars

Márquez, Nathalie; Moulijn, Jacob A.; Makkee, Michiel; Kreutzer, Michiel T.; Castaño, Pedro

doi:10.1039/c9re00056a

Cited by 9 publications

(9 citation statements)

References 57 publications

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“…The pressure drop of the whole μPBR was sharply fluctuant under the channel flow regime since the gas phase was dispersed phase, as shown in Figure 4D. Márquez et al 37 simply showed gas crookedly moved through the micro‐pillar bed based on the visual images. Navarro‐Brull and Gómez 38 presented the gas channel phenomenon in the μPBR by numerical simulation.…”

Section: Resultsmentioning

confidence: 99%

“…The slug flow and annular flow were reported mainly in the μPBR with silicon micro-post and micro-pillar structures. 30,31,36,37 The slug flow in the μPBR with micro-pillar structure attributed to the low gas superficial velocity, uniform flow cross-sectional area, and regular flow path, decreasing the flow resistance in comparison with the actual and complicated packing. The annular flow influenced by the inlet type, as the equilibrium state of gas and liquid, was similar to the parallel flow in the current work.…”

Section: Comparison and Prediction Of Flow Regimementioning

confidence: 99%

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Nature and characteristics of gas–liquid flow regimes in a micro‐packed bed reactor

et al. 2023

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Micro-packed bed reactors (μPBRs) have the advantages of high heat and mass transfer efficiency and excellent safety, and they have been successfully applied to hydrogenation and oxidation reactions. However, the study of gas-liquid flow regimes in the μPBR, which is essential for the mass transfer modeling and reactor scale-up, is still insufficient due to the limitation of micro-scale and complexity of capillary force. In this work, the flow regimes in the two-dimensional μPBR were systematically studied by visual method utilizing a high-performance camera. Four typical flow regimes and characteristics were captured, and flow regime transition was revealed. Effects of gas and liquid superficial velocities, liquid physical properties, and particle sizes on liquid spreading areal fraction and pressure drop were investigated. Flow regime transition correlation of churn flow and pseudo-static flow in the μPBR was provided for the first time based on the summary of the current and previous published results.

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Section: Resultsmentioning

confidence: 99%

Section: Comparison and Prediction Of Flow Regimementioning

confidence: 99%

Nature and characteristics of gas–liquid flow regimes in a micro‐packed bed reactor

et al. 2023

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“…The results are in good agreement with the literature, showing a general tendency of decreased fractal dimension with increasing hydrophilicity. [ 26,37–40 ] [ 54,55 ] Similarly, there is a trend of decreasing fractal dimension with decreasing water sessile drop contact angle. The respective graph is given in the Section , Supporting Information.…”

Section: Resultsmentioning

confidence: 99%

Surface Charge Affecting Fluid–Fluid Displacement at Pore Scale

Kalde

Lippold

Loelsberg

et al. 2022

Adv Materials Inter

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Efficiency in fluid–fluid displacement is drastically reduced by viscous fingering, limiting the overall effectiveness in enhanced oil recovery, membrane science, and lateral flow devices used in biomedical applications. Local instabilities at the fluid–fluid interface lead to finger‐like patterns when a less viscous fluid displaces an immiscible fluid of higher viscosity. This widely observed phenomenon in multiphase flow inside porous media is infamously intricate to control, especially for given geometry and viscosity ratio. The presented study uses a highly controlled microfluidic porous network structure with tailored ionic surface strength. The direct correlation of viscous fingering evolution on the porous structure's zeta potential at a pore‐scale level is demonstrated via polyelectrolyte coatings using a layer‐by‐layer technique. Displacement patterns are tuned from vigorous viscous fingering over stable displacement to corner flow events across a broad range of capillary numbers depending on the applied coatings. The experimental data show an increasing trend of oil recovery with increasing surface wettability, consistent with several previous findings. Furthermore, the results reveal that surface zeta potential correlates positively with recovery rate but negatively with the displacement stability quantified by the fractal dimension. These insights enable a more targeted porous media design to obtain optimal multiphase flow control.

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“…1,2 Packed bed microreactors (PBMRs) are laminar flow devices where the reactions occur in open paths with dimensions in the millimeter range. 3–6 One of the crucial advantages of using PBMRs is their large surface-to-volume ratio compared to conventional reactors. However, in situ thermal management is a major disadvantage of handling PBMRs.…”

Section: Introductionmentioning

confidence: 99%

Topology optimization of a packed bed microreactor involving pressure driven non-Newtonian fluids

Bhattacharjee

Atta

2022

React. Chem. Eng.

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Tailoring the multiphase flow pattern of gas and liquid through micro-packed bed of pillars

Cited by 9 publications

References 57 publications

Nature and characteristics of gas–liquid flow regimes in a micro‐packed bed reactor

Nature and characteristics of gas–liquid flow regimes in a micro‐packed bed reactor

Surface Charge Affecting Fluid–Fluid Displacement at Pore Scale

Topology optimization of a packed bed microreactor involving pressure driven non-Newtonian fluids

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