Numerical study on collision and breakage characteristics of oxygen carrier particles in cold state in chemical looping combustion

Liu, Fang; Ai, Lun; Xuan, Guohui; Shang, Kang; Liu, Qing; Yang, Li

doi:10.1016/j.powtec.2021.11.067

Cited by 4 publications

(2 citation statements)

References 33 publications

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“…Since the calculation method of the broken particle size of the crushing model is based on a large number of drop weight experimental data, the model is reliable. 39 The simulation results of particle breakage in the fluidized bed are very similar to the data measured by SEM, which further verifies the reliability of the Ab-t 10 breakage model.…”

Section: Model and Mesh Generation 231 Model And Grid Constructionsupporting

confidence: 74%

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Characteristics of the Particle Break Process and Its Mechanism Analysis in Fluidized Process

Zhu,

Zeng,

Song

et al. 2024

Ind. Eng. Chem. Res.

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As a typical fluidization technology, Fluid Catalytic Cracking (FCC) is faced with the problem of catalyst particle abrasion and crushing. However, due to the small particle size of catalyst particles and the complex flow in the reactor, it is difficult to study the flow, collision, and crushing characteristics of catalyst particles by experimental methods. In order to reveal the flow, collision, and crushing characteristics of catalyst particles in FCC reactor, the crushing models of single particle Abt10 and all particles were established. By tracking the particle breakage process, the particle size distribution after particle breakage was obtained, the abrasion type of particles was determined, and the energy conversion path of particles was clarified. It was found that a few sub-particles inherit most of their mechanical energy after single particle crushing, and it was speculated that most of the dissipated mechanical energy comes from the transformation of particle rotation energy to internal energy. In the simulation of all particle crushing processes, the overall particle crushing probability is 3.90%, and the particle size distribution curve after crushing shows a bimodal distribution. Considering the abrasion mechanism, it is mainly dominated by the surface peeling mechanism.

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Section: Model and Mesh Generation 231 Model And Grid Constructionsupporting

confidence: 74%

“…Figure 3. Independence verification, (a) outlet velocity of cyclone separator with different grid number, (b) scanning electron microscope image of the broken particles and the local enlarged image of the simulation results 39. …”

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confidence: 99%