Ion mobility in Nafion-117 membranes

被引:137
作者
Stenina, IA
Sistat, P
Rebrov, AI
Pourcelly, G
Yaroslavtsev, AB
机构
[1] RAS, NS Kurnakov Gen & Inorgan Chem Inst, Moscow 119991, Russia
[2] Univ Montpellier 2, IEM, F-34095 Montpellier 5, France
[3] RAS, AV Topchiev Petrochem Synth Inst, Moscow 117912, Russia
关键词
diffusion; Nafion-117; membrane; transport process; NMR;
D O I
10.1016/j.desal.2004.02.092
中图分类号
TQ [化学工业];
学科分类号
0817 ;
摘要
Transport phenomena in Nafion-117 perfluorosulphonic membranes have been studied by different techniques. Membrane electric conductivity has been measured under alternative current as a function of the equilibrating concentrations of MCl (M = Li, Na, K) and HCl solutions. Conductivities were found to increase for lithium and sodium membrane forms and decrease for the potassium form with an electrolyte concentration increase. The obtained data were compared with the results of diffusion permeability, ion-exchange kinetics, Li-7 and Cl-35 NMR measurements. In all cases permeability increased with electrolyte concentration growth. Diffusion coefficients and transport numbers for different counter- and co-ions were determined. The obtained data are discussed with the use of the two-phase membrane structure model. The selectivity of membrane sorption was found to increase with growth of cation radius.
引用
收藏
页码:49 / 57
页数:9
相关论文
共 20 条
[1]   Solid state protonic conductors, present main applications and future prospects [J].
Alberti, G ;
Casciola, M .
SOLID STATE IONICS, 2001, 145 (1-4) :3-16
[2]   Effect of conditioning techniques of perfluorinated sulphocationic membranes on their hydrophylic and electrotransport properties [J].
Berezina, NP ;
Timofeev, SV ;
Kononenko, NA .
JOURNAL OF MEMBRANE SCIENCE, 2002, 209 (02) :509-518
[3]  
BEREZINA NP, 2002, ELEKTROKHIMIYA, V38, P1009
[4]   THE EXCHANGE ADSORPTION OF IONS FROM AQUEOUS SOLUTIONS BY ORGANIC ZEOLITES .2. [J].
BOYD, GE ;
ADAMSON, AW ;
MYERS, LS .
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1947, 69 (11) :2836-2848
[5]  
ENSTEIN A, 1905, ANN D PHYS, V17, P5494
[6]  
Grigorev I.S., 1991, Physical Quantities: Handbook
[7]  
IVANOVSHITS AK, 2000, IONIKA TVERDOGOTELA, V1
[8]   Colon exclusion properties of polyphosphazene ion-exchange membranes [J].
Jones, L ;
Pintauro, PN ;
Tang, H .
JOURNAL OF MEMBRANE SCIENCE, 1999, 162 (1-2) :135-143
[9]   Membrane electric conductivity: A study of the effect of the concentration and nature of the electrolyte and of the structure of the membrane [J].
Lteif, R ;
Dammak, L ;
Larchet, C ;
Auclair, B .
EUROPEAN POLYMER JOURNAL, 1999, 35 (07) :1187-1195
[10]  
Meshechkov A. I., 1987, ELEKTROKHIMIYA, V23, P1452