摘要
模型化研究可为费托合成浆态床反应器的放大和设计提供理论支持,文中总结了现有的费托合成浆态床反应器模型,认为双泡模型比单泡模型增加了更多的物理背景且更加合理地预测反应物和产物及温度的变化等,但通过不同实验方法获得的经验关联式使用范围较窄,因此建立从机理角度出发的模型是必要的;计算流体力学(CFD)可以预测速度和浓度的分布以及内构件周围的流场,但大型反应器需要大量的网格,造成计算时间增加,建立考虑介尺度或者细网格结构关联粗网格的多尺度曳力和湍流黏度模型进行粗网格模拟是必要的;鉴于二者的优缺点提出了二者协调的模型框架。
Modeling research can provide support of theory for scale-up and design of Fischer-Tropsch （F-T） synthesis slurry reactor. Some models about F-T synthesis slurry bubble reactor were summarized, and the results indicate that double bubbles model increases more physical background and predicts more reasonable variances of reactants, products and temperature than single bubble model, but due to the narrow application range of empirical corrections which are acquired by different experiments, it is necessary to propose a model from the physical mechanism. Computation flow dynamics （CFD） can predict the distribution of velocity and concentration as well as flow field around the inner structures, however, since the industry reactor needs a lot of mesh numbers which costs more time, it is imperative to construct coarse grid simulation coupled with multi-scale models based on meso-scale or coarse grid correlated by finer grid considered to close the drag and turbulent viscosity model. According to the relative merits, a model frame harmonizing each other was proposed.
出处
《化学工程》
CAS
CSCD
北大核心
2013年第11期48-52,共5页
Chemical Engineering(China)
关键词
费托合成
浆态床反应器
模拟
气泡
模型
Fischer-Tropsch synthesis
slurry bubble column reactor
simulation
bubble
model
