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Kinetics of chlorination and carbochlorination of lead sulfate

Abstract : The kinetics of chlorination and carbochlorination of PbSO4 with Cl2 + N2 and Cl2 + CO + N2 gas mixtures has been studied using thermogravimetric measurements in the range 700–900°C. The chlorination reaction rate of PbSO4 with Cl2 + N2 increases with rise in the chlorine content in the gas mixture. The reaction order is about 0.66 with respect to chlorine. The chlorination rate of PbSO4 is controlled by a chemical reaction mechanism with an apparent activation energy of about 174 kJ/mol. In the same temperature range, the apparent activation energy of the carbochlorination of lead sulfate by Cl2 + CO + N2 gas mixture is about 114 kJ/mol. The reaction order is about 0.72 with respect to Cl2 + CO. The maximum reaction rate is obtained by using a carbochlorinating gas mixture having a Cl2(Cl2 + CO) ratio equal to about 0.6.
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Nour-Eddine Menad, Ndue Kanari, I. Gaballah. Kinetics of chlorination and carbochlorination of lead sulfate. Thermochimica Acta, Elsevier, 1997, 306, pp. 61-67. ⟨10.1016/S0040-6031(97)00302-X⟩. ⟨hal-01508114⟩

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