Reduction of sulphur in PbSPbCl2NaCl melts |
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Authors: | Maria Skyllas-Kazacos Barry J Welch |
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Affiliation: | School of Chemical Technology, The University of New South Wales, P.O. Box 1, Kensington, N.S.W. 2033, Australia |
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Abstract: | The reduction of dissolved sulphur and the soluble species formed during the electrolysis of PbS dissolved in the PbCl2NaCl eutectic has been studied chronopotentiometrically. The pre-lead reduction process reported earlier1] can now be assigned to a subsulphide species that is generated electrochemically. At higher PbS concentrations (eg 10?3 mol cm?3), elemental sulphur introduces a new reduction wave in addition to the subsulphide. The saturation solubility of sulphur is approximately proportional to the square of the PbS concentration. It has been estimated to be 2.3× 10?4 mol S cm?3 at 430°C for a melt containing 2.4× 10?3 mol PbS cm?3 in the PbCl2-NaCl eutectic. |
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Keywords: | To whom correspondence should be directed |
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