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Zirconium and Ebonex® as cathodes for sulphite ion oxidation in sulphuric acid

Lookup NU author(s): Emeritus Professor Keith Scott, Dr Hua Cheng, Dr Wathiq Taama

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Abstract

The electrochemical behaviour of zirconium metal and Ebonex® cathodes during the electrolysis of sulphite ions in sulphuric acid, at temperatures from 20 to 90 °C, is reported. The inactivity of these materials for the reduction of sulphite ions to sulphur is demonstrated, making the undivided cell oxidation of sulphite ions to sulphuric acid, at concentrations greater than 3.0 mol dm-3, a viable process. The use of these two cathodes materials in conjunction with lead dioxide-coated and palladium oxide-coated anodes for sulphite ion oxidation is described. Linear sweep voltammograms, chronopotentiometry and batch electrolysis data are presented for sulphite ion oxidation and demonstrate the concept of an undivided electrolysis for the oxidation of sulphur dioxide in sulphuric acid.

Publication metadata

Author(s): Scott K, Cheng H, Taama W

Publication type: Article

Publication status: Published

Journal: Journal of Applied Electrochemistry

Year: 1999

Volume: 29

Issue: 11

Pages: 1329-1338

Print publication date: 01/11/1999

ISSN (print): 0021-891X

ISSN (electronic): 1572-8838

Publisher: Springer

URL: http://dx.doi.org/10.1023/A:1003830018486

DOI: 10.1023/A:1003830018486

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