Radial dispersion in trickle-bed reactors: Comparison between sock and dense loadings

Llamas, Juan-David; Lesage, François; Wild, Gabriel

doi:10.1016/j.ces.2009.06.019

Cited by 11 publications

(5 citation statements)

References 5 publications

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“…The aptitude of the sensor for the investigation of several multiphase flow phenomena has been proven for (i) gas-liquid flow in pipes [16,17], (ii) multiphase flow in TBR [9,18,19], and (iii) the hydrodynamic characterization of open-cell foams in tubular reactors [20].…”

Section: Wire-mesh Sensor and Parameter Extraction From Pulse Experimmentioning

confidence: 99%

Liquid backmixing in an inclined rotating tubular fixed bed reactor – Augmenting liquid residence time via flow regime adjustment

Härting¹,

Berger²,

Lange³

et al. 2015

Chemical Engineering and Processing - Process Intensification

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Section: Wire-mesh Sensor and Parameter Extraction From Pulse Experimmentioning

confidence: 99%

Liquid backmixing in an inclined rotating tubular fixed bed reactor – Augmenting liquid residence time via flow regime adjustment

Härting¹,

Berger²,

Lange³

et al. 2015

Chemical Engineering and Processing - Process Intensification

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“…After assembling the remainder of the column, primary packing material is then added in ∼5 kg batches, with ∼5 min settling times between batches. The loading methodology is representative of what is termed “sock loading” in literature, which is characterized by random alignment of particles leading to relatively high bed porosities . Images of the resulting packed‐bed structure are presented in Figure b.…”

Section: Methodsmentioning

confidence: 99%

Hydrodynamics in a pilot‐scale cocurrent trickle‐bed reactor at low gas velocities

2018

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Hydrodynamic data obtained from laboratory‐scale trickle‐beds often fail to accurately represent industrial‐scale systems with high packing aspect ratios and column‐to‐particle diameter ratios. In this study, pressure drop, liquid holdup, and flow regime transition were investigated in a pilot‐scale trickle‐bed column of 33 cm ID and 2.45 m bed height packed with 1.6 mm × 8.4 ± 1.4 mm cylindrical extrudates for air‐water mass superficial velocities of 0.0023 – 0.094 kg/m2s and 4.5 – 45 kg/m2s, respectively, at atmospheric pressure. Significant deviation was observed from pressure drop and liquid holdup correlations at low liquid flows rates, corresponding to gravity‐driven flow limit. Likewise, liquid saturation is overestimated by correlations at high liquid flow rates, owing to significantly reduced wall effects. Lastly, trickle‐to‐dispersed bubble flow and trickle‐to‐pulsing flow regime transitions are reported using a combination of visual observations and analysis of the magnitude of local pressure fluctuations within the column. © 2018 American Institute of Chemical Engineers AIChE J, 64: 2560–2569, 2018

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“…, the Chemical Engineering Group at ENSIC CNRS in Nancy (Professor Wild) applied a similar WMS technique for the first time in a trickle‐bed reactor . They measured liquid fractions and their distribution , , local flow regime transition at individual sensing points of the sensor as well as radial liquid spreading . The device, however, was not applicable to porous particle packings and organics liquid, which are commonly present in trickle‐bed reactors.…”

Section: Flow Analysis In Packed Beds With Wire‐mesh Sensorsmentioning

confidence: 99%

Liquid Flow Visualization in Packed‐Bed Multiphase Reactors: Wire‐Mesh Sensor Design and Data Analysis for Rotating Fixed Beds

Timaeus

Berger

Schleicher

et al. 2019

Chemie Ingenieur Technik

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Wire‐mesh sensors are increasingly used for flow imaging in packed beds. In this study, a capacitance wire‐mesh sensor is applied to measure the cross‐sectional liquid phase distribution in a rotating fixed‐bed reactor. The liquid filling level is derived as a crucial parameter defining the operational window of the reactor concept. Contrary to the standard sensor configuration, wireless data transfer and autonomous power supply is integrated. Furthermore, appropriate data processing is required to visualize the liquid flow of the three‐phase system (nitrogen, cumene and γ‐Al2O3 particles).

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Radial dispersion in trickle-bed reactors: Comparison between sock and dense loadings

Cited by 11 publications

References 5 publications

Liquid backmixing in an inclined rotating tubular fixed bed reactor – Augmenting liquid residence time via flow regime adjustment

Liquid backmixing in an inclined rotating tubular fixed bed reactor – Augmenting liquid residence time via flow regime adjustment

Hydrodynamics in a pilot‐scale cocurrent trickle‐bed reactor at low gas velocities

Liquid Flow Visualization in Packed‐Bed Multiphase Reactors: Wire‐Mesh Sensor Design and Data Analysis for Rotating Fixed Beds

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