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- Title
Characterization of ion separation in electrodialysis membranes using , a dimensionless number.
- Authors
Mohammadi, K.; Malayeri, M.R.
- Abstract
In electrodialysis membranes (EDMEMs), electric potential gradient serves primarily as driving force to separate ions in electrolyte solutions using anion and cation exchange membranes. Nevertheless, the mere increase in electric potential gradient would not straightforwardly correspond to higher efficiency. Instead, the orientation of electric field lines, in combination with those of the main fluid flow stream, plays a prevailing role. In the present study, a new dimensionless number is proposed, which characterizes the orientation of electric field lines and their effect on the separation process. The dimensionless number would also serve as an engineering design tool which describes the effectiveness of different EDMEM stacks under different operating conditions i.e. velocity or geometrical aspects i.e. dimension of electrodes and membranes.
- Subjects
ELECTRODIALYSIS; ARTIFICIAL membranes; ELECTRIC fields; ION mobility; ELECTRIC potential
- Publication
Desalination & Water Treatment, 2015, Vol 55, Issue 12, p3446
- ISSN
1944-3994
- Publication type
Article
- DOI
10.1080/19443994.2014.940213