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  • 1
    Electronic Resource
    Electronic Resource
    Zirconium and Ebonex® as cathodes for sulphite ion oxidation in sulphuric acid (1999)
    Springer
    Journal of applied electrochemistry 29 (1999), S. 1329-1338 
    Details
    ISSN: 1572-8838
    Keywords: anodic oxidation ; Ebonex® ; lead dioxide anode ; sulphur dioxide ; sulphuric acid recycling ; zirconium
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Electrical Engineering, Measurement and Control Technology
    Notes: 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.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1003830018486
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Electrolysis of simulated flue gas solutions in an undivided cell Presented in part at Clean Tech '96, London, 19-21 June 1996. (1997)
    Chichester : Wiley-Blackwell
    Journal of Chemical Technology AND Biotechnology 70 (1997), S. 51-56 
    Details
    ISSN: 0268-2575
    Keywords: sulphur dioxide ; electrochemical ; anodic oxidation ; recycling ; sulphuric acid ; Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Process Engineering, Biotechnology, Nutrition Technology
    Notes: -The electrolysis of simulated flue gas solution based on sulphite/sulphuric acid is reported. Two undivided cells were employed, a small batch cell and a sieve plate electrochemical reactor (SPER). With the batch cell, two anode materials were tested for the oxidation of sulphite to sulphate, platinum and graphite. Ebonex and zirconium cathodes were used in connection with both the anodes. High current efficiencies, above 85%, were obtained in all cases, without the formation of elemental sulphur. Comparable results, 85-95%, were obtained with the sieve plate electrochemical reactor, for a current density range of 10-25 mA cm-2 at low sulphite concentration (0·005 M) in 2-6 M sulphuric acid. ©1997 SCI
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
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