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  • 1970-1974  (3)
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Material
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Year
  • 1
    Electronic Resource
    Electronic Resource
    An optical cell for photographic studies of gas evolution during molten salt electrolysis (1972)
    Springer
    Journal of applied electrochemistry 2 (1972), S. 23-29 
    Details
    ISSN: 1572-8838
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Electrical Engineering, Measurement and Control Technology
    Notes: Abstract The simple optical cell described is useful for providing supplementary information on the evolution of gases during the electrolysis of fused salts or other electrolytes. Its use with PbS-PbCl2 and PbS-PbCl2-NaCl melts demonstrated that, for anodic sulphur gas production, residual gas evolution occurs, indicating the formation of a chemisorbed species as a reaction intermediate. Dissolution of the sulphur in the melt also takes place; its rate increases with increase in temperature and sulphide concentration.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00615188
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Electrolysis of molten salt solutions containing PbSO4 (1973)
    Springer
    Journal of applied electrochemistry 3 (1973), S. 45-52 
    Details
    ISSN: 1572-8838
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Electrical Engineering, Measurement and Control Technology
    Notes: Abstract Low faradaic yields of Pb were found when electrolysing melts containing PbSO4 in solvents of either LiCl-KCl eutectic or Li2SO4-K2SO4-Na4SO4 eutectic and employing low current densities. For all current densities employed, the decrease in current efficiency became greater as the lead sulphate concentration was increased but the influence of other sulphates was less pronounced. From studies of the reaction of lead with the melt and a chronopotentiometric study of cathodic processes, we have found the following two reactions occur: (a) Cathodic deposition of lead by the reversible reaction Pb2+ +2e⇌Pb (b) Secondary non-electrochemical reaction of the electrodeposit 4Pb+5PbSO4→PbS+4PbO.PbSO4 The rate of the latter reaction is sufficient to account for the lowering in current efficiencies. No evidence could be found to support direct reduction of the sulphate anion.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01119466
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Electrolysis of molten salt solutions containing PbSO4 (1973)
    Springer
    Journal of applied electrochemistry 3 (1973), S. 53-60 
    Details
    ISSN: 1572-8838
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Electrical Engineering, Measurement and Control Technology
    Notes: Abstract The anode products formed when electrowinning lead from lead sulphate dissolved in LiCl-KCl eutectic have been determined when using a carbonaceous anode. Results indicate that electrolytic decomposition proceeds by the overall reaction $$PbSO_4 + C \to Pb + CO_2 + SO_2 $$ However at low current densities the CO2 content increases by the reaction $$C + SO_2 \rightleftharpoons CO_2 + \frac{1}{v}S_v $$ The secondary reactions of the cathodically produced lead also increase the CO2 and sulphur yields according to the following overall reactions $$2PbO + C \to 2Pb + CO_2 $$ and $$PbS \to Pb + \frac{1}{v}S_v $$ All the above electrochemical reactions are extensively polarized and chlorine co-evolution starts at low current densities.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01119467
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
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