Novel Application of X-ray Computed Tomography:  Determination of Gas/Liquid Contact Area and Liquid Holdup in Structured Packing

2007 ◽  
Vol 46 (17) ◽  
pp. 5734-5753 ◽  
Author(s):  
Christian W. Green ◽  
John Farone ◽  
Julie K. Briley ◽  
R. Bruce Eldridge ◽  
Richard A. Ketcham ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Contact Area ◽  
Liquid Holdup ◽  
Structured Packing ◽  
X Ray ◽  
X Ray Computed

Full-Scale CFD Modeling of Multiphase Flow Distribution in a Packed-bed Absorber with Structured Packing Mellapak 250Y

2020 ◽  
Vol 18 (3) ◽  
Author(s):  
Omar M. Basha ◽  
Rui Wang ◽  
Isaac K. Gamwo ◽  
Nicholas S. Siefert ◽  
Badie I. Morsi
Keyword(s):  
Computed Tomography ◽  
Pressure Drop ◽  
Packed Bed ◽  
Absorption Efficiency ◽  
Full Scale ◽  
Cfd Model ◽  
Liquid Holdup ◽  
Structured Packing ◽  
X Ray ◽  
X Ray Computed

AbstractA full-scale multi-environment Eulerian CFD model for a countercurrent packed-bed absorber with structured packing Mellapak 250Y was built in ANSYS Fluent 2019 R1 in order to model CO2 capture using physical solvents. The objective of the model is to predict the overall absorber gas-liquid internal flow profiles within the complex packing geometry, while accurately predicting the hydrodynamic parameters, such as liquid holdup and pressure drop. The gas-solid and gas-liquid drag coefficients were fitted and validated using the following experimental data by Green et al. (2006. “Hydraulic Characterization of Structured Packing via X-ray Computed Tomography”; 2007. “Novel Application of X-ray Computed Tomography: Determination of Gas/liquid Contact Area and Liquid Holdup in Structured Packing.” Industrial & Engineering Chemistry Research 46: 5734–53.): dry pressure drop, irrigated pressure drop, and liquid holdup. The validated CFD model was used to study the effect of liquid distributor design on the liquid distribution in the absorber using three distributors provided with seven, thirteen, and twenty orifices of 0.2 mm diameter. The CFD model predictions revealed that the distributor with the largest number of orifices resulted in the least liquid maldistribution in the absorber, which led to increasing the overall CO2 absorption efficiency in Selexol as a physical solvent. Also, the overall CO2 absorption efficiency decreased with increasing the superficial liquid velocity due to the shorter contact times between CO2 and Selexol in the absorber at higher superficial liquid velocities.

Determination of 3D porosity in steel fibre reinforced SCC beams using X-ray computed tomography

2014 ◽  
Vol 68 ◽  
pp. 333-340 ◽  
Author(s):  
Tomasz Ponikiewski ◽  
Jacek Katzer ◽  
Monika Bugdol ◽  
Marcin Rudzki
Keyword(s):  
Computed Tomography ◽  
Steel Fibre ◽  
X Ray ◽  
X Ray Computed

Determination of Diffusion Profiles in Altered Wellbore Cement Using X-ray Computed Tomography Methods

2014 ◽  
Vol 48 (12) ◽  
pp. 7094-7100 ◽  
Author(s):  
Harris E. Mason ◽  
Stuart D. C. Walsh ◽  
Wyatt L. DuFrane ◽  
Susan A. Carroll
Keyword(s):  
Computed Tomography ◽  
X Ray ◽  
X Ray Computed ◽  
Diffusion Profiles

Determination of Foam Induced Fluid Partitioning in Porous Media using X-ray Computed Tomography

2003 ◽  
Author(s):  
Quoc P. Nguyen ◽  
Peter K. Currie ◽  
Pacelli L.J. Zitha
Keyword(s):  
Computed Tomography ◽  
Porous Media ◽  
X Ray ◽  
X Ray Computed

Determination of the Interface Structural Resolution of an Industrial X-Ray Computed Tomograph Using a Spherical Specimen and a Gap Specimen Consisting of Gauge Blocks

2021 ◽  
Vol 883 ◽  
pp. 41-48
Author(s):  
Matthias Busch ◽  
Tino Hausotte
Keyword(s):  
Computed Tomography ◽  
Contact Point ◽  
Ideal Point ◽  
Point Contact ◽  
Volumetric Analysis ◽  
Dimensional Metrology ◽  
Destructive Testing ◽  
X Ray ◽  
X Ray Computed

Industrial X-ray computed tomography (XCT) is a tool for non-destructive testing and a volumetric analysis method with the ability to measure dimensions and geometry inside a component without destroying it. However, XCT is a relatively young technology in the field of dimensional metrology and thus faces several challenges. The achievement of a high measurement resolution, which is re-quired to detect small geometrical features, depends on a variety of influencing factors. In this arti-cle, the interface structural resolution (ISR) as one of the key challenges will be investigated. The two-sphere standard called the hourglass standard allows the determination of the structural resolu-tion by evaluation of the surrounding area of an ideal point contact of two spheres after the CT re-construction in form of a neck-shaped transition. Close to the contact point of the two spheres two opposing surfaces exist. Their distances from each other increase as the distance from the contact point of the two spheres increase. The determination of the distances between the spheres’ surface allows a statement about the ISR. A new developed specimen or standard with a variable gap size consisting of calibrated parallel gauge blocks allows statements about the ISR, too. Because of the higher number of probing points of the gauge block standard the results of the determined ISR are more stable compared to the hourglass standard. This paper compares the results of the computed tomography measurements for the designed interface structural resolution standard with those of the hourglass standard.

Determination of air-void parameters of hardened cement-based materials using X-ray computed tomography

2012 ◽  
Vol 37 ◽  
pp. 93-101 ◽  
Author(s):  
Kwang Yeom Kim ◽  
Tae Sup Yun ◽  
Jinhyun Choo ◽  
Dong Hun Kang ◽  
Hyu Soung Shin
Keyword(s):  
Computed Tomography ◽  
Hardened Cement ◽  
X Ray ◽  
Cement Based Materials ◽  
X Ray Computed ◽  
Air Void

scholarly journals Liquid distribution images on structured packing by X-ray computed tomography

AIChE Journal ◽  
2001 ◽  
Vol 47 (6) ◽  
pp. 1471-1476 ◽  
Author(s):  
P. Marchot ◽  
D. Toye ◽  
A-M. Pelsser ◽  
M. Crine ◽  
G. L'Homme ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Liquid Distribution ◽  
Structured Packing ◽  
X Ray ◽  
X Ray Computed
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