Abstract Four types of bipolar membranes (BMs) with different structural properties were subjected to various electrochemical methods including current-voltage curve, (CVC) chronopotentiometry, and impedance spectroscopy, to be characterized in terms of selectivity, energy consumption and the water splitting capability. Then the bipolar membranes were used in two kinds of electrodialysis modules, lab scale and pilot unit, for acid and base production. The produced acid and base were analyzed to calculate the product purity, energy consumption and current efficiency of each bipolar membrane electrodialysis (BMED). The results obtained with electrodialysis coincided with those of electrochemical methods, indicating that even though the electrochemical methods are rather fast and easy to perform, they are quite reliable. Furthermore the impact of structural properties of each BM on its efficiency was investigated. It was figured out that the reinforcing of a heterogeneous BM improves its properties while the increase in the ion exchange resin content on each layer of the heterogeneous BMs was not resulted in any significant enhancement of BM properties. The investigated homogenous membrane showed higher selectivity and less energy consumption compared to the heterogeneous BMs.

中文翻译：

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通过验证用于双极膜表征的电化学方法进行的调查

摘要 对具有不同结构特性的四种双极膜（BMs）进行了各种电化学方法，包括电流-电压曲线、（CVC）计时电位法和阻抗谱，以在选择性、能耗和水分解能力方面进行表征。然后将双极膜用于两种电渗析模块，实验室规模和中试单元，用于酸和碱的生产。分析产生的酸和碱以计算每个双极膜电渗析（BMED）的产品纯度、能耗和电流效率。电渗析得到的结果与电化学方法的结果一致，表明即使电化学方法相当快速和容易执行，它们也相当可靠。此外，研究了每个 BM 的结构特性对其效率的影响。结果表明，异质BM的增强改善了其性能，而异质BM每层上离子交换树脂含量的增加并未导致BM性能的任何显着增强。与异质 BM 相比，所研究的同质膜显示出更高的选择性和更低的能耗。