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  • 1 Hungarian Academy of Sciences Research Laboratory for Inorganic Chemistry P.O.B. 132 H-1502 Budapest Hungary
  • 2 CNRS Institut de Recherches sur la Catalyse 2, Avenue Einstein 69626 Villeurbanne France
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The chlorination kinetics of alkali-added (K and Li) tungsten trioxide were studied by thermogravimetry, using gaseous CCl4 as chlorinating agent. The reactivity of the modified samples was compared to the results on the chlorination of pure WO3. Similar apparent activation energies were found for the pure and alkali-added samples. However, potassium additive resulted in a strong decrease of the initial reaction rate, while surface lithium has no influence on it.