Access Restriction

Author Subramanian, K. ♦ Gomathi, K. G. ♦ Asokan, K.
Source CSIR-Central Electrochemical Research Institute
Content type Text
Publisher American Chemical Society
File Format PDF
Copyright Year ©2008
Language English
Subject Domain (in DDC) Natural sciences & mathematics ♦ Chemistry & allied sciences
Subject Keyword Electroinorganic
Abstract 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.
Educational Use Research
Education Level UG and PG
Learning Resource Type Article
Publisher Date 2008-01-01
Journal PeerReviewed