Faculty of Chemistry, Nicolaus Copernicus University in Toruń, 87-100 Toruń, Poland.
MEPhI, National Research Nuclear University, 115409 Moscow, Russia.
Int J Mol Sci. 2020 Aug 31;21(17):6325. doi: 10.3390/ijms21176325.
Reverse electrodialysis (RED) is an electro-membrane process for the conversion of mixing energy into electricity. One important problem researchers' face when modeling the RED process is the choice of the proper membrane transport equations. In this study, using experimental data that describe the membrane Nafion 120 in contact with NaCl aqueous solutions, the linear transport equation of irreversible thermodynamics was applied to calculate the power density of the RED system. Various simplifying assumptions about transport equation (i.e., four-, three-, and two-coefficients approaches) are proposed and discussed. We found that the two-coefficients approach, using the membrane conductivity and the apparent transport number of ions, describes the power density with good accuracy. In addition, the influence of the membrane thickness and the concentration polarization on the power density is also demonstrated.
反向电渗析（RED）是一种将混合能量转换为电能的电膜过程。研究人员在对 RED 过程进行建模时面临的一个重要问题是选择合适的膜传输方程。在这项研究中，使用描述与 NaCl 水溶液接触的 Nafion 120 膜的实验数据，应用不可逆热力学线性传输方程来计算 RED 系统的功率密度。提出并讨论了关于传输方程的各种简化假设（即四、三和双系数方法）。我们发现，使用膜电导率和离子的表观传输数的双系数方法可以很好地描述功率密度。此外，还展示了膜厚度和浓差极化对功率密度的影响。
