Processing of X-ray tomographic images: A procedure adapted for the analysis of phase distribution in MellapakPlus 752.Y and Katapak-SP packings

Viva, A.; Aferka, Saïd; Brunazzi, Elisabetta; Marchot, Pierre; Crine, Michel; Toye, Dominique

doi:10.1016/j.flowmeasinst.2011.03.008

Cited by 27 publications

(14 citation statements)

References 25 publications

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“…In turn, the thickness of the liquid is more in the crimp of packing, which can be seen in Figures 8-11. This phenomenon is also in accordance with earlier experimental studies where the liquid hold-up is reported to be more around the crimp [23].…”

Section: Flow On Corrugated Sheet With Smooth Crimp Surface Without Hsupporting

confidence: 93%

“…the hold-up is more near the inlet than in the outlet. This phenomenon of liquid holding up near this junction is seen in experimental study [23] performed using X-ray tomography for Mellapak 752.Y. Figures 21 and 22 show the wetting of bottom and top sheets for simulation with two corrugated sheets of packing and for two different inlet positions mentioned earlier but for the same flow rate.…”

Section: Two Corrugated Sheets Of Packingsupporting

confidence: 52%

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Analysis of Hydrodynamics of Fluid Flow on Corrugated Sheets of Packing

Subramanian

Wozny

2012

International Journal of Chemical Engineering

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Modelling of the hydrodynamics behaviour of the liquid on the corrugated sheets of packing is studied using three-dimensional, volume-of-fluid (VOF) model that is incorporated in Ansys Fluent 12.0. The flow of three different liquids with different physical properties is modelled. A domain of corrugated sheets of packing resembling the real structured packing with little modifications in the elementary geometry is constructed using ICEM CFD 12.0. The quantitative comparisons of the wetting behavior from the simulations are in good agreement with experiments. Further, the study has been extended to understand the influence of the second corrugated sheet on the flow behavior. The contours from the simulations indicate the liquid hold-up in the crimp of two corrugated sheets, and these results are in good agreement with the earlier experimental studies performed using X-ray tomography in the literature. The result from the simulation shows that even for the high flow rate of around 811 mL/min for silicon-oil (DC5), only 60% of the corrugated sheet has been wetted. Hence, the efficiency of the existing packing can be further increased by increasing the wetted area in the corrugated sheet of packing.

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Section: Flow On Corrugated Sheet With Smooth Crimp Surface Without Hsupporting

confidence: 93%

Section: Two Corrugated Sheets Of Packingsupporting

confidence: 52%

Analysis of Hydrodynamics of Fluid Flow on Corrugated Sheets of Packing

Subramanian

Wozny

2012

International Journal of Chemical Engineering

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“…Tomographic measurements were performed on 16 different cross‐sectional areas located at different heights (analyses were performed each centimeter). The experimental method for tomographic measurements and subsequent treatment for absorption coefficient processing and image analysis was described …”

Section: Methodsmentioning

confidence: 99%

High‐energy X‐ray tomography analysis of a metal packing biofilm reactor for the production of lipopeptides byBacillus subtilis

Zune

Soyeurt

Toye

et al. 2013

J of Chemical Tech & Biotech

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BACKGROUND Whereas multi‐species biofilm reactors are commonly used for the treatment of liquid and solid wastes, new strategies are progressing for the development of single species biofilm for the production of high‐value metabolites. Technically, this new concept relies on the design of bioreactors able to promote biofilm formation and on the identification of the key physico‐chemical parameters involved in biofilm formation. RESULTS An experimental setting comprising a liquid continuously recirculated on a metal structured packing has been used to promote Bacillus subtilis GA1 biofilm formation. The colonization of the packing has been visualized non‐invasively by X‐ray tomography. This analysis revealed an uneven, conical, distribution of the biofilm inside the packing. Compared with a submerged culture carried out in a stirred tank reactor, significant modification of the lipopeptide profile has been observed in the biofilm reactor with the disappearance of fengycin and iturin fractions and an increase of the surfactin fraction. In addition, considering the biofilm reactor design, no foam formation has been observed during the culture. CONCLUSIONS The configuration of this biofilm reactor set‐up allows for a higher surfactin production by comparison with a submerged culture while avoiding foam formation. Additionally, scale‐up could easily be performed by increasing the number of packing elements. © 2013 Society of Chemical Industry

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“…The group of Toye investigated the void fraction, liquid distribution, and holdup in a packed column using X‐ray CT 9, 10. They described the suitability of this measuring technique for the determination of local parameters in a packed column.…”

Section: Introductionmentioning

confidence: 99%

Imaging of Fluid Dynamics in a Structured Packing Using X‐ray Computed Tomography

Schug

Arlt

2016

Chem Eng & Technol

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For the investigation of fluid dynamics from computed tomography (CT) images an evaluation method was developed that enables the data acquisition directly from the recorded CT images. Therefore a segmentation algorithm was implemented in Matlab to assign every component a specific gray value. A comparison of weight experiments with CT scans and following segmentation yield in good accuracy of this method. The liquid holdup in different Mellapak 500.Y packings was determined through CT measurements and compared to predictive correlations from literature. 3D visualizations of short packing sections enable an evaluation of the liquid distribution and the flow morphology of the liquid in the packing. The common assumption of an even wetted packing surface with a constant liquid film thickness could not be shown in the experiments.

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Processing of X-ray tomographic images: A procedure adapted for the analysis of phase distribution in MellapakPlus 752.Y and Katapak-SP packings

Cited by 27 publications

References 25 publications

Analysis of Hydrodynamics of Fluid Flow on Corrugated Sheets of Packing

Analysis of Hydrodynamics of Fluid Flow on Corrugated Sheets of Packing

High‐energy X‐ray tomography analysis of a metal packing biofilm reactor for the production of lipopeptides byBacillus subtilis

Imaging of Fluid Dynamics in a Structured Packing Using X‐ray Computed Tomography

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