DIFFUSION AND OSMOSIS IN POTASSIUM NITRATE SYNTHESIS BY ELECTRODIALYSIS METATHESIS

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Architecture, Civil Engineering, Environment

Silesian University of Technology

Subject: Architecture, Civil Engineering, Engineering, Environmental

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ISSN: 1899-0142

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VOLUME 9 , ISSUE 4 (December 2016) > List of articles

DIFFUSION AND OSMOSIS IN POTASSIUM NITRATE SYNTHESIS BY ELECTRODIALYSIS METATHESIS

Hanna JAROSZEK / Piotr DYDO

Keywords : Electrodialysis metathesis, Potassium nitrate, Diffusion, Osmosis

Citation Information : Architecture, Civil Engineering, Environment. Volume 9, Issue 4, Pages 115-121, DOI: https://doi.org/10.21307/acee-2016-058

License : (BY-NC-ND 4.0)

Received Date : 01-April-2016 / Accepted: 09-July-2016 / Published Online: 27-August-2018

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ABSTRACT

The experimental results of the chosen salts permeation with selected heterogeneous and homogenous membranes were analysed as a part of modelling of mass transport in electrodialysis metathesis process (ED-M) for synthesis of KNO3. Heterogeneous membranes swelled more in aqueous solutions and they had higher water uptake than homogeneous membranes. Heterogeneous membranes were also more permeable for both the solute and the solvent, which was attributed to higher solubility of salts in heterogeneous membrane’s material. Diffusion coefficients in ion-exchange membranes tested in this study were found to be dependent on concentration of the upstream solution, with an exception of Ca2+ in anionexchange membranes and NO3- in cation-exchange membranes. The role of osmosis in water transport in ED-M process was found negligible.

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