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首页> 外文期刊>Chemical Engineering Research & Design: Transactions of the Institution of Chemical Engineers >Analysis of concentration polydispersity in mixed liquid-liquid systems
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Analysis of concentration polydispersity in mixed liquid-liquid systems

机译：分析在混合浓度多分散性液-液系统

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摘要

Inter-phase mass transfer for each chemical component is typically modelled with one material balance for the continuous and one for the dispersed phase. This approach contains inherently an assumption that the phases are well mixed at least locally. For the dispersed phase, this assumption requires that breakage and coalescence are significantly faster compared to the mass transfer, which is not necessarily true. It is important to carry out preliminary assessment whether the dispersed phase segregation is important and should be considered in subsequent modelling efforts, before embarking heavy multidimensional simulations where all possible dispersed phase variations are considered. In this work, relevant time scales are first defined and used for analyzing dispersed phase mixedness in liquid-liquid systems with mass transfer between the phases. Then appropriate dispersed phase modelling tools for the purpose are evaluated. Simple droplet number density based analysis is shown to estimate mixedness reasonably well. Furthermore, the drop number density approach is also shown to predict the average drop sizes with almost comparable accuracy than the full population balances.
机译：为每个化学Inter-phase传质组件通常是模仿一个材料为连续和一个平衡分散阶段。固有的假设阶段混合至少在本地。这种假设要求破损合并明显比较快传质,不一定是真的。进行初步是很重要的评估是否分散相隔离是重要的,应该考虑在随后的造型工作,之前沉重的多维模拟所有的地方分散相的可能变化考虑。首先定义,用于分析在液-液分散相mixedness系统与传质之间的阶段。然后适当分散相造型工具目的评估。基于密度的分析显示数量估计mixedness相当不错。数密度方法也显示下降预测的平均大小几乎下降的精度比完整的人口余额。

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