Membranes and Membrane Technologies最新文献_第9页

Chemical Stability of Hybrid Materials Based on Nafion® Membrane and Hydrated Oxides 基于Nafion®膜和水合氧化物的杂化材料的化学稳定性

IF 1.6

Membranes and Membrane Technologies Pub Date : 2022-12-26 DOI: 10.1134/S2517751622060087

E. Yu. Safronova, O. V. Korchagin, V. A. Bogdanovskaya, A. B. Yaroslavtsev

{"title":"Chemical Stability of Hybrid Materials Based on Nafion® Membrane and Hydrated Oxides","authors":"E. Yu. Safronova, O. V. Korchagin, V. A. Bogdanovskaya, A. B. Yaroslavtsev","doi":"10.1134/S2517751622060087","DOIUrl":"10.1134/S2517751622060087","url":null,"abstract":"Improvement of the chemical stability of hybrid membranes based on perfluorosulfonic acid polymers is necessary to increase the lifetime of fuel cells. This article presents the results of the study of the transport properties and chemical stability of the hybrid Nafion® 212 membranes modified with nanoparticles of hydrated oxides SiO2, ZrO2, and TiO2 by in situ procedure. The influence of the nature of the dopant on the properties of the obtained materials is shown. The chemical degradation of the initial and hybrid membranes has been studied ex situ by treatment with Fenton’s reagent for 240 hours. The stability of materials increases in the series Nafion + SiO2 < Nafion + ZrO2 < Nafion < Nafion + TiO2. For the Nafion + TiO2 membrane the change in mass as a result of treatment with Fenton’s reagent is two times lower than for the initial Nafion membrane. This reveals an increase in the chemical stability of materials upon the incorporation of TiO2 nanoparticles due to their ability to bind free radicals. The maximum power of membrane-electrode assembly based on hybrid membranes containing TiO2 and SiO2 is higher than that based on Nafion® 212 by 7–10% at RH ~ 100% and t = 65°C.","PeriodicalId":700,"journal":{"name":"Membranes and Membrane Technologies","volume":"4 6","pages":"414 - 422"},"PeriodicalIF":1.6,"publicationDate":"2022-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1134/S2517751622060087.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4995546","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Effect of the Parameters of Pulsed Electric Fields on the Average Current Density in the Electrodialysis Desalination of a Phosphate-Containing Solution 脉冲电场参数对含磷酸盐溶液电渗析脱盐平均电流密度的影响

IF 1.6

Membranes and Membrane Technologies Pub Date : 2022-12-26 DOI: 10.1134/S2517751622060075

O. A. Rybalkina, K. V. Solonchenko, D. Yu. Butylskii, V. V. Nikonenko, N. D. Pismenskaya

引用次数: 2

High Pressures Gas Adsorption in Porous Media and Polymeric Membrane Materials 高压气体在多孔介质和高分子膜材料中的吸附

IF 1.6

Membranes and Membrane Technologies Pub Date : 2022-12-26 DOI: 10.1134/S2517751622070022

S. E. Sokolov, V. V. Volkov

{"title":"High Pressures Gas Adsorption in Porous Media and Polymeric Membrane Materials","authors":"S. E. Sokolov, V. V. Volkov","doi":"10.1134/S2517751622070022","DOIUrl":"10.1134/S2517751622070022","url":null,"abstract":"<div><div><h3>\u0000 Abstract—</h3>The current state and future development of the energy industry dictate the need to use natural gas as a more environmentally friendly fossil fuel and to make a smooth transition to hydrogen energy. In this regard, adsorption at elevated pressures (>10 MPa) has been actively studied in recent decades to solve problems such as the extraction of natural gas from deep underground deposits and its further membrane purification, as well as the selection of adsorbents for the accumulation of methane and hydrogen. However, the correct determination of adsorption values at elevated pressures faces a number of problems that are not typical for moderate pressures. The main difficulties here are the correct determination of the skeletal volume of the adsorbent and the volume of the adsorbate. In the case of amorphous adsorbents, the swelling of the sample induced by sorption and its compressibility must also be taken into account. This review discusses recent advances in the description of gas adsorption at high pressures in porous media and membrane polymeric materials, including the specific conditions of contact with supercritical carbon dioxide. The paper also gives brief descriptions of the adsorption values used (net, excess, and absolute adsorption), as well as experimental methods for measuring adsorption at high pressures.</div></div>","PeriodicalId":700,"journal":{"name":"Membranes and Membrane Technologies","volume":"4 6","pages":"455 - 469"},"PeriodicalIF":1.6,"publicationDate":"2022-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4998215","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Structure and Transport Properties of Cellulose Acetate/Montmorillonite Composites 醋酸纤维素/蒙脱土复合材料的结构与输运性能

IF 1.6

Membranes and Membrane Technologies Pub Date : 2022-12-26 DOI: 10.1134/S2517751622060063

G. A. Polotskaya, I. S. Kuryndin, N. N. Saprykina, S. V. Bronnikov

引用次数: 0

Transport Properties of Ultrafiltration Membranes Based on Copolyimide/Nanodiamonds Composites 聚酰亚胺/纳米金刚石复合材料超滤膜的输运特性

IF 1.6

Membranes and Membrane Technologies Pub Date : 2022-10-11 DOI: 10.1134/S2517751622050092

A. Yu. Pulyalina, N. S. Tyan, I. I. Faykov, G. A. Polotskaya, V. A. Rostovtseva

引用次数: 2

Bipolar Membrane with Phosphoric Acid Catalyst for Dissociation of Water Molecules: Preparation, Electrochemical Properties, and Application 磷酸催化水分子解离双极膜:制备、电化学性能及应用

IF 1.6

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

{"title":"Bipolar Membrane with Phosphoric Acid Catalyst for Dissociation of Water Molecules: Preparation, Electrochemical Properties, and Application","authors":"N. V. Kovalev, T. V. Karpenko, I. P. Averyanov, N. V. Sheldeshov, V. I. Zabolotsky","doi":"10.1134/S2517751622050067","DOIUrl":"10.1134/S2517751622050067","url":null,"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.","PeriodicalId":700,"journal":{"name":"Membranes and Membrane Technologies","volume":"4 5","pages":"347 - 356"},"PeriodicalIF":1.6,"publicationDate":"2022-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4479727","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Coagulation and Ultrafiltration: a Hybrid Process for Purification of Used Engine Oils 混凝和超滤:一种用于二手机油净化的混合工艺

IF 1.6

Membranes and Membrane Technologies Pub Date : 2022-10-11 DOI: 10.1134/S2517751622050055

S. V. Fedosov, A. V. Markelov, A. V. Sokolov, Yu. P. Osadchy

{"title":"Coagulation and Ultrafiltration: a Hybrid Process for Purification of Used Engine Oils","authors":"S. V. Fedosov, A. V. Markelov, A. V. Sokolov, Yu. P. Osadchy","doi":"10.1134/S2517751622050055","DOIUrl":"10.1134/S2517751622050055","url":null,"abstract":"The article presents experimental studies of the hybrid process of regeneration of used oils based on two interrelated processes of coagulation and ultrafiltration. The hypothesis that the process of coagulation due to aggregation of particles and organic substances contributes to the formation of a more porous sediment layer, which reduces pore blockage and increases filtration efficiency, has been checked. The aim of this study is to determine the most effective parameters of the baromembrane process by describing changes in the properties of deposits in a tubular ceramic membrane during ultrafiltration of waste oils. At the first stage, experiments were carried out on a Jar reactor with two different coagulants: an aqueous solution of diaminomethanal and a mixture of ethanolamine and propane-2-ol, and the effect of coagulants on the process of flake formation has been investigated by micrography of droplet samples and paper chromatography. At the second stage, studies of the ultrafiltration process have been carried out. Coagulation and ultrafiltration experiments have shown different permeability of the process. The effect on the permeate flow depends on the nature and composition of the coagulant. As a result of experiments, it has been shown that more stable flakes are formed under the influence of an aqueous solution of diaminomethanal and, as a result, a longer operation of the membrane element without a drop in permeability is observed.","PeriodicalId":700,"journal":{"name":"Membranes and Membrane Technologies","volume":"4 5","pages":"297 - 305"},"PeriodicalIF":1.6,"publicationDate":"2022-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4476476","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Theoretical and Experimental Study of Neutralization Dialysis of Phenylalanine–Mineral Salt Equimolar Mixture of Different Concentrations 不同浓度苯丙氨酸-矿物盐等摩尔混合物中和透析的理论与实验研究

IF 1.6

Membranes and Membrane Technologies Pub Date : 2022-10-11 DOI: 10.1134/S2517751622050080

M. V. Porozhnyy, A. E. Kozmai, A. A. Mareev, V. V. Gil

{"title":"Theoretical and Experimental Study of Neutralization Dialysis of Phenylalanine–Mineral Salt Equimolar Mixture of Different Concentrations","authors":"M. V. Porozhnyy, A. E. Kozmai, A. A. Mareev, V. V. Gil","doi":"10.1134/S2517751622050080","DOIUrl":"10.1134/S2517751622050080","url":null,"abstract":"A non-steady state mathematical model of the separation of a solution of an amino acid (phenylalanine) and a mineral salt (NaCl) by the neutralization dialysis (ND) method in a circulating hydrodynamic mode has been proposed. The model takes into account the characteristics of the membranes (thickness, ion-exchange capacity, electrical conductivity) and the solution (concentration and nature of the components) and the flow rate of the solution in the dialyzer compartments. The new model, unlike the known models, takes into account the transport of phenylalanine cations and anions across membranes and diffusion layers of the ND system. In addition, the model takes into account the ability of an amino acid to undergo protonation/deprotonation reactions. Comparison of the simulation results with experimental data suggests that the model adequately describes the ND of solutions of a phenylalanine–NaCl mixture. It has been shown that, for a given pair of membranes (CSE cation-exchange membrane and ASE anion-exchange membrane, Astom, Japan) and studied concentrations, the pH of the mixed solution remains relatively low throughout the entire process, and the rate of decrease in the electrical conductivity is lower than that for an individual NaCl solution. The loss of phenylalanine in the ND process has been determined according to analysis of the experimental data and simulation results.","PeriodicalId":700,"journal":{"name":"Membranes and Membrane Technologies","volume":"4 5","pages":"306 - 318"},"PeriodicalIF":1.6,"publicationDate":"2022-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4477105","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Sorption and Gas Transport Characteristics of Polyimides Based on a Mixture of Diethyl Toluene Diamine Isomers 基于二乙基甲苯二胺异构体混合物的聚酰亚胺的吸附和气体输运特性

IF 1.6

Membranes and Membrane Technologies Pub Date : 2022-10-11 DOI: 10.1134/S251775162205002X

A. Yu. Alentiev, V. E. Ryzhikh, R. Yu. Nikiforov, D. A. Bezgin, S. V. Chirkov, N. A. Belov, A. M. Orlova, A. A. Kuznetsov

{"title":"Sorption and Gas Transport Characteristics of Polyimides Based on a Mixture of Diethyl Toluene Diamine Isomers","authors":"A. Yu. Alentiev, V. E. Ryzhikh, R. Yu. Nikiforov, D. A. Bezgin, S. V. Chirkov, N. A. Belov, A. M. Orlova, A. A. Kuznetsov","doi":"10.1134/S251775162205002X","DOIUrl":"10.1134/S251775162205002X","url":null,"abstract":"The transport of oxygen, nitrogen, and hydrocarbons C1–C4 in polyimides based on 4,4'-(hexafluoroisopropylidene)diphthalic anhydride (6FDA) and biphenyl-3,3',4,4'-tetracarboxylic acid dianhydride (BPDA) and diethyl toluene diamine (DETDA) has been studied. The dependences of the diffusion coefficient on the diffusant effective diameter and the solubility coefficients on the Lennard–Jones potential of pair interaction have been considered. It is shown that the diffusion coefficients of butane are out of the linear dependence of the logarithm of the diffusion coefficient on the square of the effective diameter of the diffusant, which may indicate the plasticization of polymers with butane at a pressure of 1 atm. The permeability of mixtures of gases O2–N2 (29 : 71 v/v) and CO2–CH4 (62 : 38 v/v) has been studied. There are no significant differences in the gas separation parameters in comparison with the experiment for individual gases; however, for a mixture of CO2–CH4, a slight increase in the separation factor has been found as compared to the ideal selectivity. The data on the measurement of sorption isotherms and solubility coefficients O2, N2, and CH4 are also presented in the article. Gas solubility coefficients have been found to be close to the values obtained indirectly as P/D.","PeriodicalId":700,"journal":{"name":"Membranes and Membrane Technologies","volume":"4 5","pages":"290 - 296"},"PeriodicalIF":1.6,"publicationDate":"2022-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1134/S251775162205002X.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4480307","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Experimental and Theoretical Study of Influence of Nature of Counterion on Electroosmotic Water Transport in Sulfonated Cation-Exchange Membranes 反离子性质对磺化阳离子交换膜电渗透输水影响的实验与理论研究

IF 1.6

Membranes and Membrane Technologies Pub Date : 2022-10-11 DOI: 10.1134/S2517751622050043

I. V. Falina, N. A. Kononenko, S. A. Shkirskaya, O. A. Demina, Yu. M. Volfkovich, V. E. Sosenkin, M. V. Gritsay

引用次数: 0