Abstract
Abstract An electrochemical kinetic model is described from which the rate of formation of lead chloride from a melt of lead and bismuth and bubbles of gaseous chlorine is calculated. The basic assumption of the model. is that the reaction rate is controlled by the electronic conductivity of the salt phase. Two periods of bubble history are recognized: (i) an inflation period and (ii) a rise period. The electrochemical rate equation and the mass balance equation are evaluated using published data for the ionic and electronic conductivity of the salt phase and information on bubble hydrodynamics. The calculated rates of formation of lead chloride and chlorine utilization are in broad agreement with laboratory-scale measurements. Agreement between the rate of chlorination as calculated from the model and as determined from industrial-scale studies is less good, probably due to uncertainties in the hydrodynamics of the relatively large bubbles involved. Resume Un modele electrochimique est propose a partir d...
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