Theoretical Analysis of Mass Transfer of Deionization by Cation and Anion Mixed-Ion Exchange Resins—A Batchwise Contact—

JOURNAL OF CHEMICAL ENGINEERING OF JAPAN

Tadaaki Nishiki¹  Akinori Muto¹  Takeshi Kataoka¹ 

[1] Department of Chemical Engineering, College of Engineering, University of Osaka Prefecture

关键词: Ion Exchange;    Deionization;    Mixed Resin;    Mass Transfer;   

DOI  :  10.1252/jcej.27.375

来源: Maruzen Company Ltd

【 摘 要 】

References(8)Cited-By(4)A mass transfer model for deionization by mixed cation and anion exchange resins is presented in this paper. This model is based on ion exchange and neutralization reactions and is composed by considering ionic valence, diffusion resistances in both resin and liquid phases and mixed volume fraction of the resins. A simplified form of the above model is also shown for deionization by the mixed resin as adsorption of a salt.The calculated results for a batch system were studied and it was found that: 1) pH value of the solution showed complicated behavior in the course of deionization, even though equal-normality mixed resins were used. Its behavior was greatly affected by the mixed-resin volume fraction and the initial concentration of a salt; 2) both strict and simplified models were compared, and it was found that the neutralization reaction has a large effect on the deionization rate.

【 授权许可】

Unknown