Computational fluid dynamics simulation of gas–liquid–solid polyethylene fluidized bed reactors incorporating with a dynamic polymerization kinetic model
Computational fluid dynamics simulation of gas–liquid–solid polyethylene fluidized bed reactors incorporating with a dynamic polymerization kinetic model
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DOI：
10.1002/apj.2265
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发表时间：
2018-10
影响因子：
1.8
通讯作者：
Pan Hui;Liu Yuan-xing;Luo Zheng-hong
中科院分区：
文献类型：
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作者：
Pan Hui;Liu Yuan-xing;Luo Zheng-hong
在三流体计算流体力学(CFD)模型中加入了一个包括中心形成、链引发、链传播、链转移和链失活等基本反应的聚合动力学模型来描述气液固三相聚乙烯流态化反应器中的聚合物性质。首先讨论了操作条件对聚乙烯性能的影响。此外，考虑到三相反应器放大的重要性和复杂性，结合CFD模型研究了放大效应对聚合反应速率的影响，表明放大效应导致反应器内流体力学的差异将导致聚合反应速率的不同。
A comprehensive polymerization kinetics model that includes site formation, chain initiation, chain propagation, chain transfer and chain deactivation elementary reactions was incorporated into the three‐fluid computational fluid dynamics (CFD) model to describe the polymer properties in the gas–liquid–solid three‐phase polyethylene fluidized bed reactor. The effect of operating conditions on polyethylene properties was firstly discussed. Furthermore, due to the importance and complexity of scaling up three‐phase reactors, the incorporated CFD model was then employed to investigate the scale‐up influence, which indicates that the difference of flow hydrodynamics in the reactor due to scale‐up effect will result in the difference of polymerization reaction rate.