Application of irreversible thermodynamic model to a hollow fiber forward osmosis module in sodium chloride aqueous solution system
Application of irreversible thermodynamic model to a hollow fiber forward osmosis module in sodium chloride aqueous solution system
复制标题
不可逆热力学模型在氯化钠水溶液体系中空纤维正渗透模块中的应用
DOI：
10.1016/j.desal.2020.114458
复制
发表时间：
2020
期刊：
影响因子：
--
通讯作者：
M. Sekino
中科院分区：
文献类型：
--
作者：
Shohei Goda;M. Sekino
介绍了一种基于不可逆热力学模型的正渗透（FO）组件模型，该模型在考虑扩散溶质通量的同时，还考虑了传统溶液扩散模型忽略的对流溶质通量。此外，通过耦合内、外浓差极化对膜模型进行了修正，得到了完整的膜传输方程。FO模块模型也由FO模块中流动行为特征的相关方程组成。一个平行流中空纤维FO模块非常类似于医疗用透析器用于模型的性能分析。该模型能较好地解释氯化钠溶液体系的实验数据。此外，该模型在预测溶质迁移方面上级传统模型。通过FO模块模型，特别是溶质对流系数出现在该模型中，对流溶质通量对FO性能的影响被清楚地证明。由于水通量和伴随它的对流溶质通量之间有很强的关系，该模型将是有用的高渗透性FO膜在未来的发展。
A forward osmosis (FO) module model including the membrane model based on the irreversible thermodynamic model was introduced, which considers the convective solute flux that the conventional solution diffusion model ignores, alongside the diffusive solute one. In addition, the membrane model was modified by coupling with the internal and the external concentration polarizations to form the overall membrane transport equation. The FO module model was also composed of correlation equations for the characteristics of flow behavior in the FO module. A parallel flow hollow fiber FO module very similar to a medical-use dialyzer was used for the performance analysis of the model. This module model was able to explain the experimental data in the sodium chloride solution systems well. Moreover, this model was superior to the conventional one in predicting the solute transfer. By the FO module model, specifically the solute convective coefficient appearing in this model, the effect of the convective solute flux on the FO performance was clearly demonstrated. Since there is a strong relationship between the water flux and the convective solute flux accompanying it, this model will be useful for the development of high permeable FO membranes in the future.