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Ion-exchange membrane electrodialysis for saline water desalination and its application to seawater concentration / Yoshinobu Tanaka in Industrial & engineering chemistry research, Vol. 50 N° 12 (Juin 2011) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 50 N° 12 (Juin 2011) . - pp. 7494-7503 Titre : Ion-exchange membrane electrodialysis for saline water desalination and its application to seawater concentration Type de document : texte imprimé Auteurs : Yoshinobu Tanaka, Auteur Année de publication : 2011 Article en page(s) : pp. 7494-7503 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Membrane  separation  Seawater  Desalination  Electrodialysis  Ion  exchange  membrane Résumé : Membrane pair characteristics of commercially available ion-exchange membranes are measured by changing current density and seawater temperature supplied to the electrodialyzer. The hydraulic permeabilities (leading parameter) for three types of commercially available membranes are almost the same, and their averages are expressed by the empirical function of temperature. Hydraulic osmosis is predominant at lower current density and electro-osmosis is predominant at larger current density. The influence of temperature and salt concentration on the physical properties of saline water, such as solution density, specific conductance, and NaCl activity coefficient, is expressed by empirical equations. Ionic constituents in a concentrated solution are expressed by empirical equations. Electric current screening ratio of a spacer is defined and calculated. Direct current electric resistance of a membrane pair is calculated, and it is predominant over that of a desalting cell and a concentrating cell. It is necessary to decrease electric resistance of an ion-exchange membrane for reducing energy consumption in a salt manufacturing process. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24239065 [article] Ion-exchange membrane electrodialysis for saline water desalination and its application to seawater concentration [texte imprimé] / Yoshinobu Tanaka, Auteur . - 2011 . - pp. 7494-7503. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 50 N° 12 (Juin 2011) . - pp. 7494-7503 Mots-clés : Membrane  separation  Seawater  Desalination  Electrodialysis  Ion  exchange  membrane Résumé : Membrane pair characteristics of commercially available ion-exchange membranes are measured by changing current density and seawater temperature supplied to the electrodialyzer. The hydraulic permeabilities (leading parameter) for three types of commercially available membranes are almost the same, and their averages are expressed by the empirical function of temperature. Hydraulic osmosis is predominant at lower current density and electro-osmosis is predominant at larger current density. The influence of temperature and salt concentration on the physical properties of saline water, such as solution density, specific conductance, and NaCl activity coefficient, is expressed by empirical equations. Ionic constituents in a concentrated solution are expressed by empirical equations. Electric current screening ratio of a spacer is defined and calculated. Direct current electric resistance of a membrane pair is calculated, and it is predominant over that of a desalting cell and a concentrating cell. It is necessary to decrease electric resistance of an ion-exchange membrane for reducing energy consumption in a salt manufacturing process. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24239065

Ion-exchange membrane electrodialysis of saline water and Its numerical analysis / Yoshinobu Tanaka in Industrial & engineering chemistry research, Vol. 50 N° 18 (Septembre 2011) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 50 N° 18 (Septembre 2011) . - pp. 10765-10777 Titre : Ion-exchange membrane electrodialysis of saline water and Its numerical analysis Type de document : texte imprimé Auteurs : Yoshinobu Tanaka, Auteur Année de publication : 2011 Article en page(s) : pp. 10765-10777 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Membrane  separation  Numerical  simulation  Numerical  analysis  Electrodialysis  Ion  exchange  membrane Résumé : A computer simulation program was developed for a continuous saline water electrodialysis process. A practical-scale electrodialyzer was operated for concentrating seawater, and its performance was observed. The operating results of the electrodialyzer were computed by using the operating conditions as input for the program. The computed data were generally the same as the observed data. Thus, the program enables the semiquantitative discussion of the performance of a practical-scale electrodialyzer. In addition, (1) the current density distribution; (2) the electric resistances of a membrane pair, a desalting cell, and a concentrating cell; (3) the pressure drops in a desalting cell and a concentrating cell; and (4) the limiting current density of an electrodialyzer are discussed. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24523893 [article] Ion-exchange membrane electrodialysis of saline water and Its numerical analysis [texte imprimé] / Yoshinobu Tanaka, Auteur . - 2011 . - pp. 10765-10777. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 50 N° 18 (Septembre 2011) . - pp. 10765-10777 Mots-clés : Membrane  separation  Numerical  simulation  Numerical  analysis  Electrodialysis  Ion  exchange  membrane Résumé : A computer simulation program was developed for a continuous saline water electrodialysis process. A practical-scale electrodialyzer was operated for concentrating seawater, and its performance was observed. The operating results of the electrodialyzer were computed by using the operating conditions as input for the program. The computed data were generally the same as the observed data. Thus, the program enables the semiquantitative discussion of the performance of a practical-scale electrodialyzer. In addition, (1) the current density distribution; (2) the electric resistances of a membrane pair, a desalting cell, and a concentrating cell; (3) the pressure drops in a desalting cell and a concentrating cell; and (4) the limiting current density of an electrodialyzer are discussed. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24523893