CFD-PBM investigation of the hydrodynamics in a slurry bubble column reactor with a circular gas distributor and heat exchanger tube

Li, Le; Lian, Wenhao; Bai, Bing; Zhao, Yansheng; Zhang, Qian; Huang, Wei

doi:10.1016/j.cesx.2020.100087

Cited by 8 publications

(10 citation statements)

References 64 publications

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“…It captures the key phenomena and trends observed in experiments, allowing researchers to understand the dominant mechanisms and identify critical factors affecting particle behavior. In the present study, we have considered the Luo and Svendsen model for both breakage and agglomeration, followed by previous works. − In practical cases, sand particles can also form agglomerates when bitumen acts as a binder. However, in our CFD–PBM study presented here, we mainly focused on the bitumen residual distribution in the pipeline.…”

Section: Modeling Of Multiphase Flowsmentioning

confidence: 99%

Numerical Insights from a Population Balance Model into the Distribution of Bitumen Residues in Industrial Horizontal Pipes During the Hydrotransport of Oil Sands Tailings

Sontti,

Zhang

2023

Ind. Eng. Chem. Res.

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Pipeline transportation is a vital method for conveying crushed oil sand ores and tailings in the oil sands industry. This study focuses on enhancing economic benefits by exploring the separation of valuable bitumen residues from coarse sand tailings within hydrotransport pipelines. Employing threedimensional transient Eulerian−Eulerian computational fluid dynamics (CFD) simulations coupled with a population balance model (PBM), we examine the aggregation and breakage of bitumen droplets under various flow conditions. The accuracy of the CFD−PBM model is validated against field measurements of velocity profiles and pressure drops. Our findings reveal that higher slurry velocities lead to intensified particle−bitumen interactions, resulting in reduced aggregated bitumen droplet sizes at the pipeline's core. Additionally, variations in bitumen fraction cause shifts in the distribution of coarse particles along the pipe's vertical axis with increased aggregation and larger droplets in the upper region. Notably, we demonstrate that smaller bubbles promote a more uniform distribution of bitumen compared with larger bubbles. These insights provide valuable knowledge for optimizing bitumen recovery processes and facilitate the integration of pipeline hydrotransport dynamics with downstream separation and extraction units.

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Section: Modeling Of Multiphase Flowsmentioning

confidence: 99%

Numerical Insights from a Population Balance Model into the Distribution of Bitumen Residues in Industrial Horizontal Pipes During the Hydrotransport of Oil Sands Tailings

Sontti,

Zhang

2023

Ind. Eng. Chem. Res.

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“…Lie et al [39] investigated the effects of a circular heat exchanger using a 2D CFD PBM model on the hydrodynamics of a pilot scale slurry bubble column reactor (Fig. 6).…”

Section: Heat Transfermentioning

confidence: 99%

Eulerian Approach to CFD Analysis of a Bubble Column Reactor – A Review

Abdulrahman¹,

Nassar²

2022

World Congress on Mechanical, Chemical, and Material Engineering

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Bubble Column Reactors (BCR) / Slurry Bubble Column Reactors (SBCR) have many advantageous characteristics as such they are used in numerous industrial applications. This work reviews the Eulerian Computational Fluid Dynamics (CFD) approach when analysing BCR/ SBCRs. Several studies have been reviewed which vary parameters such as the reactor design, superficial gas velocity, pressure, CFD models (drag, turbulence), particle concentration, and phase material to investigate their effects on the reactor's performance in terms of hydrodynamics or heat transfer. This review indicates that using a Eulerian CFD model can accurately predict the BCR/SBCR's performance. Key findings include that increasing the superficial gas velocity, column pressure, and gas phase density increases the gas holdup. Gas holdup is unevenly distributed in the BCR where most of the gas holdup is in the centre of the column. Increasing solid particles decreases the bubble breakup rate and gas holdup. Furthermore, it was concluded that increasing the superficial gas velocity increases the average slurry temperature and volumetric heat transfer. However, decreasing the column height increases the slurry temperature and volumetric heat transfer.

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“…In addition, the difference in the hydrodynamic behavior with different spargers was also apparent from the measured profiles of the turbulent kinetic energy and Reynolds stress. In our recent article, the impacts of a circular tubular distributor with a downward opening on the hydrodynamics of a pilot-scale SBCR were investigated by employing the CFD-PBM model . The structure of the gas distributor is shown in Figure .…”

Section: Effect Of Gas Distributors On Reactor Performancementioning

confidence: 99%

“…In our recent article, the impacts of a circular tubular distributor with a downward opening on the hydrodynamics of a pilot-scale SBCR were investigated by employing the CFD-PBM model. 30 The structure of the gas distributor is shown in Figure 8. Unlike traditional perforated plates, the gas holdup profile with the circular distributor showed a bimodal structure in the radial direction, inducing a strong circulation flow of slurry, which was conducive to the collision of slurry catalyst particles.…”

Section: Effect Of Gas Distributors On Reactormentioning

confidence: 99%

“…A systematic procedure for the optimum selection and design of a distributor was described. − A variety of instrumentation, such as a hot film anemometer (HFA), fiber optic probes, computer-aided radioactive particle tracking equipment (CARPT), a laser Doppler anemometer (LDA), a particle image velocimeter (PIV), and an ultrasound velocity profiler (UVP), were used to measure the hydrodynamic parameters. − Nevertheless, most of the above-cited studies were performed in a cold-flow system under ambient temperature and pressure, which left uncertainties about the impact of the gas distributor under high temperatures and pressures. With the improvement in computing power, computational fluid dynamics (CFD) modeling has been widely used for assessing the effect of gas distributors on hydrodynamic parameters and reaction performance in BCR/SBCRs. − Detailed information on the flow characteristics, which can be measured experimentally only with difficulty, can be provided by CFD. The proper use of the CFD model is helpful in developing scale-up strategies and further understanding the fluid dynamics inside BCR/SBCRs.…”

Section: Introductionmentioning

confidence: 99%

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Review on the Effect of Gas Distributor on Flow Behavior and Reaction Performance of the Bubble/Slurry Reactors

Zhao

Lian

et al. 2021

Ind. Eng. Chem. Res.

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Gas distributors greatly affect the performance of bubble column or slurry bubble column reactors (BCR/SBCRs). Investigation of design parameters characterizing the operation and transport phenomena of gas distributors in BCR/SBCRs can lead to a better understanding of hydrodynamic properties and mass transfer mechanisms. The performance of gas distributors is often described using various mathematical models and computational fluid dynamics simulations supported by experimental research. Nonetheless, little effort has been made to review the effect of the configurations of gas distributors on BCR/SBCR performance. The negative consequences of weeping and uneven gas maldistribution caused by unreasonable design of the distributor were rarely appreciated. This paper reviews the effects of gas distributor configuration on flow behavior and reaction performance. Adequate information about the design and development of gas distributor technology in BCR/SBCRs is provided. Some suggestions for potential research to better comprehend the effects of gas distributor design are put forward.

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CFD-PBM investigation of the hydrodynamics in a slurry bubble column reactor with a circular gas distributor and heat exchanger tube

Cited by 8 publications

References 64 publications

Numerical Insights from a Population Balance Model into the Distribution of Bitumen Residues in Industrial Horizontal Pipes During the Hydrotransport of Oil Sands Tailings

Numerical Insights from a Population Balance Model into the Distribution of Bitumen Residues in Industrial Horizontal Pipes During the Hydrotransport of Oil Sands Tailings

Eulerian Approach to CFD Analysis of a Bubble Column Reactor – A Review

Review on the Effect of Gas Distributor on Flow Behavior and Reaction Performance of the Bubble/Slurry Reactors

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