Application of Magnetic Resonance Imaging (MRI) for investigation of fluid dynamics in trickle bed reactors and of droplet separation kinetics in packed beds

Nguyen, Ngoc Luan; Buren, V. van; Garnier, A. von; Hardy, Edme H.; Reimert, R.

doi:10.1016/j.ces.2005.04.083

Cited by 33 publications

(11 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…More recent studies [6,7] have acquired images of liquid distribution and used these data to compare with predictions of liquid holdup and static liquid saturation. Developments in ultra-fast MRI have also enabled the real-time visualisation of pulsing flow, which occurs at higher liquid velocities which causes liquid pulses to form and move through the bed.…”

Section: Introductionmentioning

confidence: 99%

Magnetic resonance velocity imaging of liquid and gas two-phase flow in packed beds

Sankey

Holland

Sederman

et al. 2009

Journal of Magnetic Resonance

View full text Add to dashboard Cite

Section: Introductionmentioning

confidence: 99%

Magnetic resonance velocity imaging of liquid and gas two-phase flow in packed beds

Sankey

Holland

Sederman

et al. 2009

Journal of Magnetic Resonance

View full text Add to dashboard Cite

“…Hydrodynamics of trickle-bed reactors have been investigated extensively in previous reports [3][4][5][6][7][8][9][10]. Generally, cylindrical beds filled with spherical catalysts have been analyzed in terms of pressure drop and liquid holdup.…”

Section: Introductionmentioning

confidence: 99%

Numerical and Experimental Study of Catalyst Loading and Body Effects on a Gas‐Liquid Trickle‐Flow Bed

Salimi¹,

Hashemabadi²,

Noroozi³

et al. 2012

Chem Eng & Technol

View full text Add to dashboard Cite

The influence of tortuosity and fluid volume fractions on trickle-flow bed performance was analyzed. Hydrodynamics of the gas-liquid downward flow through trickle beds, filled with industrial trilobe catalysts, were investigated experimentally and numerically. The pressure drop and liquid holdup were measured at different gas and liquid velocities and in two different loading methods, namely, sock and dense catalyst loading. The effect of sharp corners on hydrodynamic parameters was considered in a bed with rectangular cross section. The reactor was simulated, considering a three-phase model, appropriate porosity function, and interfacial forces based on the Eulerian-Eulerian approach. Computational fluid dynamics (CFD) simulation results for pressure drop and liquid holdup agreed well with experimental data. Finally, the velocity distribution in two types of loading and the effect of bed geometry in CFD results demonstrated that pressure drop and liquid holdup were reduced compared to a cylindrical one due to high voidage at sharp corners.

show abstract

“…7 shows stress chains resulting from a gentle compression of packed Fig. 3 Packing density fluctuations in spheres: radial packing density distributions extrapolated from the X-Ray CT scans (in black) [48] and from the FDEM Solidity numerical simulations in a cylindrical container (red) [27]. (Color figure online) Fig.…”

Section: Pellets For Fixed Bed Catalytic Reactorsmentioning

confidence: 99%

A class of particulate problems suited to FDEM requiring accurate simulation of shape effects in packed granular structures

et al. 2019

View full text Add to dashboard Cite

In many granular material simulation applications, DEM capability is focused on the dynamic solid particulate flow properties and on systems in which millions of particles are involved. The time of relevance is many seconds or even minutes of real time. Simplifying assumptions are made to achieve run completion in practical timescales. There are certain applications, typically involving manufactured particles, where a representative pack is of the order of a thousand particles. More accurate capturing of the influence of complex shape is then often possible. Higher accuracies are necessary to model the topology of the void space, for example, for further CFD simulation and optimisation of fluid flow properties. Alternatively, the accuracy may be critical for structural performance and the force or stress transmission through the contact points is to be controlled to avoid material damage and poor function. This paper briefly summarises methods for simulation of shape effects on packing structures in the granular community and narrows the scope to problems where shape effects are of overriding concern. Two applications of mono-sized, mono-shaped packing problems are highlighted: catalyst support pellets in gas reforming and concrete armour units in breakwater structures. The clear advantages of FDEM for complex-shaped particle interactions in packed systems with relatively few particles are discussed. A class of particulate problems, 'FDEM-suited' problems, ones that are ideal to be solved by FDEM rather than by DEM, is proposed for science and engineering use.

show abstract

Application of Magnetic Resonance Imaging (MRI) for investigation of fluid dynamics in trickle bed reactors and of droplet separation kinetics in packed beds

Cited by 33 publications

References 16 publications

Magnetic resonance velocity imaging of liquid and gas two-phase flow in packed beds

Magnetic resonance velocity imaging of liquid and gas two-phase flow in packed beds

Numerical and Experimental Study of Catalyst Loading and Body Effects on a Gas‐Liquid Trickle‐Flow Bed

A class of particulate problems suited to FDEM requiring accurate simulation of shape effects in packed granular structures

Contact Info

Product

Resources

About