The catalytic dehydrofluorination of CF3CH3 into CF2CH2 was studied over various metal phosphates in a fixed-bed reactor. The Mg2P2O7 catalyst exhibited moderate activity, higher selectivity and greater stability. The active sites for CF2CH2 formation are weak acid sites of the catalysts.
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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