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Abstract
Kinetic parameters of ‘oxide ion – CCl4’ interaction (carbochlorination) on the background of liquid BaCl2-KCl (0.26:0.74) in 943–1023 K temperature range have been determined by a potentiometric method. A cell with the membrane oxygen electrode Pt(O2)|ZrO2(Y2O3) was used for detection of O2‒ concentration during the interaction. The chemical reaction in the solution is found to become limiting at relatively low oxide ion concentrations (less than 10−5 mol·kg−1), and it is characterised by the second kinetic order with respect to oxide ion. The purification process stops at equilibrium concentrations of O2− within (1 – 2)·10−7 mol·kg−1. The polythermal study allows to estimate the activation energy of the carbochlorination as 238 ± 30 kJ·mol−1.