Simulation and experimental validation of reactive bubble column reactors
Simulation and experimental validation of reactive bubble column reactors
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DOI：
10.1016/j.ces.2016.12.053
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发表时间：
2017-10-12
影响因子：
4.7
通讯作者：
Bart, H. -J.
中科院分区：
文献类型：
--
作者：
Hlawitschka, M. W.;Kovats, P.;Bart, H. -J.
气泡塔在化工工艺中应用广泛。这些反应器的整体性能取决于流体力学、界面传质和化学反应之间的相互作用。这些柱的布置通常基于简化的积分模型，无法跟踪局部流体力学与反应之间复杂的相互作用。因此，需要对正在进行的交互有详细的了解。研究了在柱状气泡柱中氢氧化钠水溶液中二氧化碳（CO2）化学吸附的局部和时间演化过程。因此，局部测量流体力学，气泡大小和速度，液体速度和浓度（ph值）使用高速PIV/LIF系统结合阴影成像。结果与考虑持续反应的基于欧拉-欧拉的计算流体动力学模拟进行了比较。(C) 2017 Elsevier Ltd.版权所有。
Bubble columns are widespread in chemical process engineering. The overall performance of these reactors relies on the interaction between the hydrodynamics, interfacial mass transfer and chemical reactions. The layout of these columns is commonly based on simplified integral models that are not able to track the complex interactions between the local hydrodynamics and the reactions. Hence, a detailed knowledge about the ongoing interactions is required. The local and temporal evolution of the carbon dioxide (CO2) chemisorption in aqueous NaOH solution in a cylindrical bubble column is investigated. Therefore, local measurements of hydrodynamics, bubble size and velocity, liquid velocity and concentration (pH-value) are done using a high speed PIV/LIF system combined with shadowgraphy. The results are compared to Euler-Euler based computational fluid dynamics simulations that take into account the ongoing reaction. (C) 2017 Elsevier Ltd. All rights reserved.