Abstract：The AlF3 catalyst was prepared by the precipitator method to catalyze dehydrofluorination of 1,1,1,2-tetrafluoroethane to trifluoroethylene in the fixed-bed reactor. The effects of preparation conditions on catalyst performance were discussed, including solvent, precipitation temperature and the concentration of hydrofluoric acid. It was concluded that the all catalysts were the β-AlF3 without regard to preparation conditions. The AlF3, prepared under ethanol as solvent, room temperature and hydrofluoric acid(22.5 mol/L), showed the highest initial activity. Over the catalyst, the initial conversion of 1,1,1,2-tetrafluoroethane reached to 36% with the selectivity of trifluoroethylene about 100% at 450 ℃, contact time 3.2 (g·s)/mL. After 8 h reaction, the conversion decreased to 26% and the selectivity was still 100%.
Bai Yanbo,Mao Wei,Qin Yue et al. Effect of Preparation Conditions on Catalytic Performance of AlF3 Used for Dehydrofluoration of 1,1,1,2-tetrafluoroethane[J]. 化学反应工程与工艺, 2014, 30(5): 458-462.
