Bipolar Membrane with Phosphoric Acid Catalyst for Dissociation of Water Molecules: Preparation, Electrochemical Properties, and Application

IF 2 Q4 CHEMISTRY, PHYSICAL Membranes and Membrane Technologies Pub Date : 2022-10-11 DOI:10.1134/S2517751622050067

N. V. Kovalev, T. V. Karpenko, I. P. Averyanov, N. V. Sheldeshov, V. I. Zabolotsky

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Abstract

The bipolar heterogeneous membrane has been obtained by applying a layer of phosphoric acid ion exchanger paste on a water-based wet rough cation exchange membrane, followed by drying and hot pressing with an anion exchange membrane. It is shown by the method of electrochemical impedance that the obtained membrane at a current density of 1.1 A/dm² has a bipolar overvoltage of 0.26 V. This is comparable to the overvoltage of the bipolar region of industrial membrane MB-3 (0.29 V) and is much lower than the same value for industrial bipolar membrane MB-1 (2.86 V) and membrane MB-2 (8.04 V). The process of obtaining acid and sodium hydroxide from solutions of sodium chloride and sodium nitrate in an electrodialyzer with three-chamber elementary cells consisting of the obtained bipolar membrane and monopolar membranes Ralex CMH and Ralex AMH has been investigated. Integral current efficiencies and productivities for acid and alkali are higher, and energy consumptions and contaminations of the produced acid and alkali solutions with salt ions are lower than when using the industrial MB-3 membrane.

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磷酸催化水分子解离双极膜:制备、电化学性能及应用

在水基湿式粗阳离子交换膜上涂上一层磷酸离子交换浆料，用阴离子交换膜进行干燥和热压，得到了双极性非均相膜。电化学阻抗法表明，在电流密度为1.1 a /dm2时得到的膜具有0.26 V的双极过电压。这与工业膜MB-3的双极区过电压(0.29 V)相当，远低于工业膜MB-1的双极区过电压(2.86 V)和MB-2的双极区过电压(8.04 V)。本文研究了由双极膜和单极膜Ralex CMH和Ralex AMH组成的三室基本电池在电渗析器中从氯化钠和硝酸钠溶液中获得酸和氢氧化钠的过程。与使用工业MB-3膜相比，酸和碱的整体电流效率和生产率更高，含盐离子的酸和碱溶液的能耗和污染更低。

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来源期刊

Membranes and Membrane Technologies Multiple-

CiteScore

3.10

自引率

31.20%

发文量

期刊介绍： The journal Membranes and Membrane Technologies publishes original research articles and reviews devoted to scientific research and technological advancements in the field of membranes and membrane technologies, including the following main topics:novel membrane materials and creation of highly efficient polymeric and inorganic membranes;hybrid membranes, nanocomposites, and nanostructured membranes;aqueous and nonaqueous filtration processes (micro-, ultra-, and nanofiltration; reverse osmosis);gas separation;electromembrane processes and fuel cells;membrane pervaporation and membrane distillation;membrane catalysis and membrane reactors;water desalination and wastewater treatment;hybrid membrane processes;membrane sensors;membrane extraction and membrane emulsification;mathematical simulation of porous structures and membrane separation processes;membrane characterization;membrane technologies in industry (energy, mineral extraction, pharmaceutics and medicine, chemistry and petroleum chemistry, food industry, and others);membranes and protection of environment (“green chemistry”).The journal has been published in Russian already for several years, English translations of the content used to be integrated in the journal Petroleum Chemistry. This journal is a split off with additional topics.