Production of sodium hypochlorite in an electrolyser equipped with a ceramic membrane

The electrochemical synthesis of sodium hypochlorite in a membrane electrolyser equipped with an aluminazirconia ceramic membrane and comprising a titanium anode coated with cobalt oxide has been investigated. The current density, sodium chloride concentration and solution flow velocity in the elect...

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Bibliographic Details
Published in:Desalination 1999-11, Vol.126 (1), p.77-82
Main Authors: Bashtan, S.Yu, Goncharuk, V.V., Chebotareva, R.D., Belyakov, V.N., Linkov, V.M.
Format: Article
Language:English
Subjects:
Applied sciences
Ceramic membrane
Chemical industry and chemicals
Chemistry
Composite anode
Electrochemistry
Electrolysis
Exact sciences and technology
General and physical chemistry
Industrial chemicals
Inorganic industry
Kinetics and mechanism of reactions
Sodium hypochlorite
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Summary:The electrochemical synthesis of sodium hypochlorite in a membrane electrolyser equipped with an aluminazirconia ceramic membrane and comprising a titanium anode coated with cobalt oxide has been investigated. The current density, sodium chloride concentration and solution flow velocity in the electrode chambers of the electrolyser have been measured in order to establish how these parameters effect process efficiency. It was found that under optimal conditions the electrical current efficiency reaches 77%. An electrical energy expenditure of 2.4 KWth and a sodium chloride consumption of 3.1 kg per kg sodium hypochlorite produced have been recorded. The anti-corrosion stability of the anode under various experimental conditions was also studied.
ISSN:0011-9164
1873-4464
DOI:10.1016/S0011-9164(99)00156-3