Mass Transfer Mechanism of Deionization by Mixed Bed

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;    Mixed Bed;    Mass Transfer;    Deionization;    Breakthrough Curve;   

DOI  :  10.1252/jcej.27.755

来源: Maruzen Company Ltd

【 摘 要 】

References(12)For deionization by a mixed bed, a mass transfer model is presented on the basis of both cation and anion exchange reactions and neutralization reaction. Cation and anion exchange characteristics and mixed fraction of the two resins are considered in the model.Theoretical ionic breakthrough curves of the model equations were obtained by using a finite difference numerical method. Effects of salt, concentration, flow rate of feed solution, bed height and mixed fraction of both resins on the breakthrough curves were examined theoretically and experimentally. The calculated breakthrough curves agreed with experimental data under various conditions. This result suggests that the proposed model can be applied to the deionization process in a mixed bed. The relation between the diffusion resistances of transfer ions and the operational conditions was also studied using a numerical simulation.

【 授权许可】

Unknown