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

Härting, Hans-Ulrich; Berger, Ronny; Lange, Rüdiger; Larachi, Faı̈çal; Schubert, Markus

doi:10.1016/j.cep.2015.02.003

Cited by 13 publications

(13 citation statements)

References 29 publications

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“…Apart from these works, some researchers paid more attention to comprehensively study the effect of different tilt angles on the hydrodynamics prevailing inside stationary packed beds in three gas–liquid contacting modes, namely, cocurrent downward, cocurrent upward, and countercurrent or when cocurrent downflow slanted packed beds are subjected to axial vessel rotations …”

Section: Introductionmentioning

confidence: 99%

Cyclic operation strategies in inclined and moving packed beds—Potential marine applications for floating systems

Dashliborun

Larachi

Hamidipour³

2016

AIChE Journal

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The hydrodynamics of a periodically operated packed bed subjected to column oscillations and obliquity was studied. Electrical capacitance tomography (ECT) and capacitance wire mesh sensors were employed to measure the local instantaneous liquid saturation in stationary slanted and moving packed beds, respectively. A swell simulator with sixdegree-of-freedom motions was applied to emulate the behavior of floating packed beds. The results revealed that column inclination from the vertical position considerably decayed liquid waves excited by different cyclic operation strategies. However, ON-OFF liquid and gas/liquid alternating cyclic operations showed an attempt to conserve wave identity in the slanted bed and to decrease phase maldistribution resulting from bed inclination. It was also found that symmetric and non-symmetric split ratios of ON-OFF liquid cyclic mode were able to noticeably decrease fluid maldistribution in the oscillating packed bed. This study opens up possible prospects for process intensification of floating packed bed reactors and contactors.

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Section: Introductionmentioning

confidence: 99%

Cyclic operation strategies in inclined and moving packed beds—Potential marine applications for floating systems

Dashliborun

Larachi

Hamidipour³

2016

AIChE Journal

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“…The liquid back mixing in the inclined rotating tubular fixed bed reactor was investigated in another study [41]. Due to increasing transverse forces, an increase in axial dispersion with rotational velocity was observed.…”

Section: Analysis Of the Reaction Under Rotationmentioning

confidence: 98%

A novel inclined rotating tubular fixed bed reactor concept for enhancement of reaction rates and adjustment of flow regimes

Härting

Lange

Larachi

et al. 2015

Chemical Engineering Journal

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“…Härting et al [34][35][36] reported that the superimposed rotation of previously inclined packed beds leads to cyclic wetting/dewetting mode of operation at the expense of gas-liquid segregation and emergence of stratified flow pattern in the bed (Fig. 9 a).…”

Section: Potential Methods For Process Intensificationmentioning

confidence: 99%

“…Recently, two new reactor concepts have been introduced for process intensification of conventional cocurrent two-phase flow packed-bed reactors: (i) inclined rotating reactor [34][35][36] and (ii) low-shear rotation of the vertical reactor [37]. Härting et al [34][35][36] reported that the superimposed rotation of previously inclined packed beds leads to cyclic wetting/dewetting mode of operation at the expense of gas-liquid segregation and emergence of stratified flow pattern in the bed (Fig.…”

Section: Potential Methods For Process Intensificationmentioning

confidence: 99%

Offshore Floating Packed‐Bed Reactors: Key Challenges and Potential Solutions

2017

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Dedicated to Professor Rüdiger Lange on the occasion of his 65th birthdayThe influence of floating vessel motions on the hydrodynamic behavior of multiphase flows in porous media was studied using a hexapod ship motion emulator with an embarked packed column. The response of gas-liquid distribution, pressure drop, liquid saturation, and flow regime transition to column inclinations and roll motions was compared to those of the corresponding static vertical and inclined configurations. Two-phase flow patterns in terms of local liquid saturation distribution were visualized online by means of a capacitance wire-mesh sensor positioned firmly on the floating packed bed. The hydrodynamic performance of packed beds under roll motion deviates strongly from that of the static beds, indicating that the known characteristics of the conventional land-based tricklebed reactors cannot be transposed on a one-to-one basis for design and scale-up of the floating reactor configurations.

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

Cited by 13 publications

References 29 publications

Cyclic operation strategies in inclined and moving packed beds—Potential marine applications for floating systems

Cyclic operation strategies in inclined and moving packed beds—Potential marine applications for floating systems

A novel inclined rotating tubular fixed bed reactor concept for enhancement of reaction rates and adjustment of flow regimes

Offshore Floating Packed‐Bed Reactors: Key Challenges and Potential Solutions

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