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.
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References
K. Scott., ‘Electrochemical Processes for Clean Technology’ (RSC, Cambridge 1995).
J.R. Smith, F.C. Walsh and R.L. Clarke, J. Appl. Electrochem. 28 (1998) 1021.
K. Kendall, J.D. Birch, A.N. McAlford and R.L. Clark, ‘Ad-vanced Ceramics in Chemical Process Engineering’, edited by B.C.H. Steele and D.P. Thompson. Proceedings of the British Ceramic Soc. No. 43 (1988) 131.
J. Przyluski and K. Kolbrecka, J. Appl. Electrochem. 23 (1993) 1063.
J.E. Graves, D. Pletcher, R.L. Clarke and F.C. Walsh, J. Appl. Electrochem. 22 (1992) 200.
K. Scott and B. Hayati, Chem. Eng. and Proc. 32 (1993) 253.
K. Scott, Electrochim. Acta 35 (1990) 621.
Y. Malherbe and C.H. Comninellis J. App. Electrochem. 24 (1994) 584.
P.W. Lu and R.L. Ammon, J. Electrochem. Soc. 127 (1980) 2610.
G. Kreysa and A. Storck, ‘Electrochemical Cell Design and Optimisation Procedures’, Dechema Monograph (VCH Verlagsge-sellsehaft) Vol. 123 (1991) 225.
K. Scott and W. Taama in press Electrochimica Acta.
I.P. Voroshilov, N.N. Nechiporenko and E.P. Voroshilova, Elektrokhimiya 10 (1974) 1378.
T. Hunger, F. Lapicque and A. Storck, J. Appl. Electrochem. 21 (1991) 588.
G. Kreysa, J.M. Bisang, W. Kochanek and G. Linzbach, J. Appl. Electrochem. 15 (1985) 639.
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Scott, K., Cheng, H. & Taama, W. Zirconium and Ebonex® as cathodes for sulphite ion oxidation in sulphuric acid. Journal of Applied Electrochemistry 29, 1329–1338 (1999). https://doi.org/10.1023/A:1003830018486
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DOI: https://doi.org/10.1023/A:1003830018486