1,1,2,2-Tetrachloroethane and tetrachloromethane were oxidized with air oxygen over monolithic platinum-rhodium, platinum-zirconium and palladium-vanadium catalysts at 350 to 700 degrees C to carbon dioxide, hydrogen chloride and water in an electrically heated tube reactor. To reach the total oxidation of the substrates, a temperature range 500 to 700 degrees C was required. Monolithic Pt-Rh catalyst was found to be the most active one. The content of polychlorinated dibenzodioxines and furanes in the combustion gases did not exceed the admissible value (0. 1 ng TEQ/m(3)).