Numerical investigation of turbulent mass transfer processes in turbulent fluidized bed by computational mass transfer

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外文摘要：Turbulent fluidized bed possesses a distinct advantage over bubbling fluidized bed in high solids contact efficiency and thus exerts great potential in applications to many industrial processes.Simulation for fluidization of fluid catalytic cracking(FCC)particles and the catalytic reaction of ozone decomposition in turbulent fluidized bed is conducted using the Eulerian-Eulerian approach,where the recently developed two-equation turbulent(TET)model is introduced to describe the turbulent mass diffusion.The energy minimization multi-scale(EMMS)drag model and the kinetic theory of granular flow(KTGF)are adopted to describe gas-particles interaction and particle-particle interaction respectively.The TET model features the rigorous closure for the turbulent mass transfer equations and thus enables more reliable simulation.With this model,distributions of ozone concentration and gas-particles two-phase velocity as well as volume fraction are obtained and compared against experimental data.The average absolute relative de-viation for the simulated ozone concentration is 9.67％which confirms the validity of the proposed model.Moreover,it is found that the transition velocity from bubbling fluidization to turbulent fluidization for FCC particles is about 0.5 m·s-1 which is consistent with experimental observation.

外文关键词：

Turbulent fluidized bedSimulationComputational mass transferTurbulenceComputational fluid dynamics

作者：

Hailun Ren、Liang Zeng、Wenbin Li、Shuyong Chen、Zhongli Tang、Donghui Zhang

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作者单位：

Department of Chemical Engineering,Tianjin Renai College,Tianjin 301636,China

School of Chemical Engineering and Technology,Tianjin University,Tianjin 300072,China

Innovation Center for Advanced Glass Materials(Anhui)Co.,Ltd,Bengbu,233000,China

The Research Center of Chemical Engineering,School of Chemical Engineering and Technology,Tianjin University,Tianjin 300072,China

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出版年：

2024

DOI：

10.1016/j.cjche.2024.09.009

中国化学工程学报(英文版)

中国化工学会

中国化学工程学报(英文版)

CSTPCDEI

影响因子：0.818

ISSN：1004-9541

年,卷(期)：2024.76(12)