Uneven distribution of particle flow in RFCC reactor riser

Cho, Hyungtae; Kim, Junghwan; Park, Chanho; Lee, Kwanghee; Kim, Myung-Jun; Moon, Il

doi:10.1016/j.powtec.2017.01.025

Cited by 11 publications

(2 citation statements)

References 40 publications

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“…Traditional risers have some drawbacks, such as extensive reaction time, low catalyst activity and selectivity, and excessive cracking of products. [3] Over the past decades, researchers have been working to improve the activity of catalysts and propose new reactor structures to ameliorate reaction efficiency and gas-solid distribution. Liu et al [4] mixed the modified NaY/kaolin composite microspheres and additive microspheres to prepare a novel FCC catalyst, finding that it has more meso-and macro-pores which can raise propylene yield.…”

Section: Introductionmentioning

confidence: 99%

Numerical analysis of hydrodynamic characteristics and interphase coupling in a gas‐solid cyclone reactor

Wang

Zhu

et al. 2021

Can J Chem Eng

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A down-flow gas-solid cyclone reactor (GSCR) for fluidized catalytic cracking process was proposed to solve the side reactions. Comprehensive threedimensional numerical models were established to interpret its gas-solid flow features, where the continuous phase and dispersed phase were modelled in the Eulerian grid and Lagrangian framework, respectively. Simulation results show that the four-way approach has a better prediction of gas-solid flow hydrodynamics in GSCR than the two-way approach, and the numerical pressure drop agreed well with the experimental data. Most catalysts accumulated on the wall when descending and the phase interface structure composed of internal pure gas and external mixtures was subsequently formed. The radial distribution of tangential velocity was almost hump shaped. Tangential and axial kinetic energies accounted for 92.49%-95.45% of total kinetic energy and were thus dominant. In the dilute condition, the oscillatory behaviour of particle concentration was more severe than that of gas velocities, and particle concentration and gas tangential velocity had the same dominant frequency (~2.6 Hz). As the particulate loading increased tenfold, the hydrodynamic characteristics became rather complex.

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Section: Introductionmentioning

confidence: 99%

Numerical analysis of hydrodynamic characteristics and interphase coupling in a gas‐solid cyclone reactor

Wang

Zhu

et al. 2021

Can J Chem Eng

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“…Zhang et al [8] investigated the mixing and segregation behavior of biomass particle in fluidized bed experimentally. Although many researchers had done a lot of research on the distribution characteristics of the regular particles [9][10][11][12][13], such as glass beads, quartz sand, relative characteristics study was scarcely concern about the particles of this special flexible ribbon type.…”

Section: Introductionmentioning

confidence: 99%

A Method for Analyzing the Radial Distribution of Flexible Ribbon Particles and Cluster in a Fluidized Bed Riser

Wu¹,

Li²,

Yuan³

2018

World Congress on Mechanical, Chemical, and Material Engineering

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Many biomass materials, such as herbage, tobacco leaf and seaweed are chopped into small strips and usually dried by fluidized bed dryer. These Flexible ribbon particles in the fluidized bed riser may have experienced a much more complicated process, such as heat & mass transfer, mixing and drying. They are easy to hold together due to the flexibility and the non-uniformity of ribbon shape. Thus, it is important to understand the distribution of this special particle and cluster in the riser. High-speed camera method has always been used in measurement. However, it is difficult to analyze the particle flow due to the overlaps of the flexible ribbon particle in the shot image. So this paper presented a new analyzing method in order to obtain more information of this special gas-solid flow. And the radial concentration distribution of flexible filamentous particle and cluster in gas-solid flow in were experimentally analyzed. It is found that the concentration distribution of the flexible filamentous cluster was completely different from that of the conventional spherical particles.

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Optimization of RFCC Process Considering Particle Deposition Model

Cho

Lee

et al. 2020

Computer Aided Chemical Engineering

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Uneven distribution of particle flow in RFCC reactor riser

Cited by 11 publications

References 40 publications

Numerical analysis of hydrodynamic characteristics and interphase coupling in a gas‐solid cyclone reactor

Numerical analysis of hydrodynamic characteristics and interphase coupling in a gas‐solid cyclone reactor

A Method for Analyzing the Radial Distribution of Flexible Ribbon Particles and Cluster in a Fluidized Bed Riser

Optimization of RFCC Process Considering Particle Deposition Model

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