Catalytic combustion of trichloroethylene over TiO2-SiO2 supported catalysts

Combustion of trichloroethylene (TCE) on Cr2O3, V2O5, Pt or Pd catalysts supported on TiO2-SiO2 as a carrier has been investigated. It was found that oxide catalysts are very active but their activity quickly diminishes due to loss of the active component, especially at higher reaction temperatures and/or at high concentrations of TCE in the feed. Addition of water to the feed results in slower deactivation. The noble metal-based catalysts have a lower activity than the oxidic ones, but they are stable during the test and can be used under more severe conditions: higher temperature and high concentration of chlorine. Pt/SiO2-TiO2 is mildly and reversibly poisoned during the reaction. TiO2-SiO2 appears to be a stable and resistant support of catalysts for TCE combustion.