Abstract: A series of MOx/Al2O3（M=Ni，Mg，Co，Ce） catalysts were prepared by the deposition-precipitation method，and the effect of different additives on catalytic pyrolysis was studied. The catalysts were characterized by X-ray diffraction （XRD），and transformation of Al species in the MOx/Al2O3 catalysts after pre-fluorination was investigated. The catalysts were used in catalytic pyrolysis of 1,1,1,2-tetrafluoroethane （HFC-134a） to trifluoroethylene （TrFE），and the results showed that the addition of Ni，Co，Ce to AlF3 could improve catalytic performance for the pyrolysis of HFC-134a，while that of Mg could cause inhibition of catalytic performance. High activity was obtained on NiFx/AlF3 catalyst. The conversion of 1,1,1,2-tetrafluoroethane was higher than 21.4% and the selectivity to trifluoroethylene was 99.7% at reaction temperature of 400℃，and NiFx/AlF3 catalyst exhibited a longer life span.

Key words: 1,1,1,2-tetrafluoroethane , catalysis, trifluoroethylene, alumina, deposition-precipitation, stability

摘要： 采用沉积沉淀法制备了MOx/Al2O3（M=Ni、Mg、Co、Ce）催化剂，研究了不同助剂对催化剂反应性能的影响，应用X射线衍射（XRD）考察了氟化预处理前后MOx/Al2O3催化剂中Al物种的转变，并应用于HFC-134a（1,1,1,2-四氟乙烷）裂解制备三氟乙烯（TrFE）反应。结果表明，Ni、Co、Ce添加能有效提高AlF3催化剂的HFC-134a裂解性能，而Mg对AlF3催化性能起抑制作用。其中，NiFx/AlF3催化剂催化性能最高，当反应温度为400℃时，HFC-134a的转化率最高可达21.4%，三氟乙烯的选择性在99.7%以上，且反应较为稳定。

关键词: 四氟乙烷, 催化, 三氟乙烯, 氧化铝, 沉积沉淀法, 稳定性