Liquid residence time distribution of multiphase horizontal flow in packed bed milli-channel: Spherical beads versus open cell solid foams

Serres, Marion; Schweich, D.; Vidal, Valérie; Philippe, Régis

doi:10.1016/j.ces.2018.05.004

Cited by 24 publications

(26 citation statements)

References 46 publications

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“…Results from designs 1, 3, and 4 indicate that there is an optimum pillar-spacing range where the passages between pillars are occupied by both phases in an alternating fashion (design 3). Our results resemble those of Serres et al 54 who compared spherical beads versus open cell solid foams obtaining better mass transfer within the former system. Serres et al 55 and Arbabi et al 56 also demonstrated the formation of Taylor gas bubbles across irregular 3D packings, as shown in Fig.…”

Section: Effect Of Solid Propertiespillar Arrangementsupporting

confidence: 89%

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

et al. 2019

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Section: Effect Of Solid Propertiespillar Arrangementsupporting

confidence: 89%

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

et al. 2019

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“…According to the literature, it was observed that few studies were reported on the hydrodynamics and the residence time distribution (RTD) in the miniature fixed‐bed devices of cylindrical shape, 60‐62 square shape, 62,63 and the rectangular miniature multichannel, with the packing, 64,65 and without the packing 66 . These researches are not adequate in the level of applications of the miniature fixed‐bed devices.…”

Section: Introductionmentioning

confidence: 99%

Lead adsorption in a serpentine millichannel‐based packed‐bed device: Effect of hydrodynamics and mixing characteristics

2021

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The present study depicts the hydrodynamics and the mixing characteristics in a millichannel‐based serpentine fixed‐bed device to attain the particular demands of the miniature adsorption devices' fabrication. Residence time distribution analyses were accomplished to analyze the velocity distribution inside the packed bed geometry. The effects of operating variables on the system hydrodynamics and mixing and their impact on the lead adsorption characteristics were enunciated. New correlations were proposed for the frictional resistance and axial dispersion of the fluid. The parametric effects on the lead ions [Pb(II)] adsorption were studied in the same millichannel geometry packed with the graphene oxide coated glass beads. The kinetics of the adsorptive removal process is assessed by the Thomas model and the Yoon–Nelson model. The regeneration study of the said millichannel‐based fixed‐bed device was also executed.

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“…More detailed models have also been developed like the PDE (piston flow with axial dispersion and mass exchange between the dynamic and the stagnant zone) model, by dividing the liquid phase in a packed bed into a dynamic and a stagnant zone 51 − 53 or models with discrete series of continuous mixing cells containing a stagnant zone. 54 However, in micropacked beds with gas–liquid flow, few studies exist on the characterization of dispersion characteristics. Marquez et al., 55 found that the dispersion in a small milli-packed bed (2 mm inner diameter and 90 cm long, 115 μm glass spheres), operated under a limited fluid-mechanical interaction of the gas phase with the liquid, was lower than the dispersion in an equivalent single-liquid-phase system by a factor of 2–3.…”

Section: Resultsmentioning

confidence: 99%

Study of Liquid–Solid Mass Transfer and Hydrodynamics in Micropacked Bed with Gas–Liquid Flow

Cao

Radhakrishnan

Hasanudin

et al. 2021

Ind. Eng. Chem. Res.

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The volumetric liquid–solid (L-S) mass transfer coefficient under gas–liquid (G-L) two-phase flow in a silicon-chip-based micropacked bed reactor (MPBR) was studied using the copper dissolution method and was related to the reactor hydrodynamic behavior. Using a high-speed camera and a robust computational image analysis method that selectively analyzed the bed voidage around the copper particles, the observed hydrodynamics were directly related to the L-S mass transfer rates in the MPBR. This hydrodynamic study revealed different pulsing structures inside the packed copper bed depending on the flow patterns established preceding the packed bed upon increasing gas velocity. A “liquid-dominated slug” flow regime was associated with an upstream slug flow feed. A “sparse slug” flow regime developed with an upstream slug-annular flow feed. At higher gas velocity, a “gas continuous with pulsing” regime developed with an annular flow feed, which had similar features to the pulsing flow in macroscale packed beds, but it was sensitive and easily destabilized by disturbances from upstream or downstream pressure fluctuations. The volumetric L-S mass transfer coefficient decreased with increasing gas velocity under the liquid-dominated slug flow regime and became rather less affected under the sparse slug flow regime. By resolving the transition from the liquid-dominated slug flow to the sparse slug flow and capturing the onset of the gas-continuous with pulsing regime, we gained new insights into the hydrodynamic effects of G-L flows on the L-S mass transfer rates in a MPBR.

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Liquid residence time distribution of multiphase horizontal flow in packed bed milli-channel: Spherical beads versus open cell solid foams

Cited by 24 publications

References 46 publications

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

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

Lead adsorption in a serpentine millichannel‐based packed‐bed device: Effect of hydrodynamics and mixing characteristics

Study of Liquid–Solid Mass Transfer and Hydrodynamics in Micropacked Bed with Gas–Liquid Flow

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