Electrosynthesis of Potassium Permanganate in a Cation Exchange Membrane Cell
IR@CECRI: CSIR-Central Electrochemical Research Institute, Karaikudi
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| Title |
Electrosynthesis of Potassium Permanganate in a Cation Exchange Membrane Cell
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| Creator |
Subramanian, K.
Gomathi, K.G. Asokan, K. |
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| Subject |
Electroinorganic
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| Description |
Potassium permanganate is produced by the electro-oxidation of alkaline potassium manganate in a divided
electrolytic cell. A filter press type flow electrolyzer has been designed, fabricated, and operated with perfluoro
sulfonic acid based cation exchange membrane Nafion 417, precious metal/precious metal oxide coated titanium
anode, and stainless steel cathode. Optimum process parameters are evaluated and reported. Performance
characteristics of coated titanium anodes are compared with conventional nickel anodes, to fix the most suitable
one for the job on hand. Anode materials have been electrochemically characterized by potentiodynamic
studies in alkaline potassium manganate solution. Transport properties of the membrane Nafion 417 for K+
ions and water molecules are studied using a small membrane cell operating on batch mode. It has been
estimated that each K+ ion transported across the membrane carries with it 1.5 to 1.7 water molecules. The
anolyte contains K2MnO4 and KOH. Studies reveal that the relative current efficiency value for electrooxidation
of manganate and the competing anodic oxygen evolution may have a direct bearing on the source
of K+ ion transported across the cation exchange membrane.
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| Publisher |
American Chemical Society
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| Date |
2008
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| Type |
Article
PeerReviewed |
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| Format |
application/pdf
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| Identifier |
http://cecri.csircentral.net/119/1/047-2008.pdf
Subramanian, K. and Gomathi, K.G. and Asokan, K. (2008) Electrosynthesis of Potassium Permanganate in a Cation Exchange Membrane Cell. Ind. Eng. Chem. Res., 47 (22). pp. 8526-8532. |
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| Relation |
http://cecri.csircentral.net/119/
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