The most stable perfluorocarbon, CF4, was decomposed to CO2 at above 550 °C in the presence of water vapor over AlPO4 in which 10 atomic % of Al ions are substituted by Ce. Catalytic activity slightly decreased within first 50 h and then took a stationary state for succeeding 50 h. No changes in the structure of catalyst were observed after 100 h reaction. Mg pyrophosphate and phosphates of Ca, B, Fe, Zn, Bi, and Ni were not active up to 700 °C. The addition of Ce, La, Pr, Nd, Gd, Yb, Er, or Y into AlPO4 increased the catalytic activity.
CCl2F2 was decomposed to CO2 at 350–450 °C in the presence of water vapor and O2 over AlPO4 calcined at 1000 °C. CCl2F2 conversion slightly decreased at initial 50 h and then took a steady value. AlPO4 was not fluorinated during 1000 h reaction at 400 °C.
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