Abstract: The impregnation, precipitation and co-precipitation methods were adopted to prepare the composite supports with titanium, and pore structure and surface acid properties of the synthesized samples were characterized by XRD, N₂ adsorption-desorption, TEM, and Py-IR. The results show that the different prepared methods have an effect on the structure of composite supports with titanium. γ-Al₂O₃ in samples prepared by co-precipitation method showed the uniform spherical particles, but not the fiber structure. The BET surface area and porous volume and the amount of acidity of the composite supports prepared by co-precipitation are the lowest. Moreover, the surface of composite supports with titanium contained only L acid sites.

Key words: Composite support of titanium   ,  γ-Al₂O₃,      , Pore structure,    ,  Acid properties

摘要： 采用浸渍法、沉淀法和共沉淀法制备了含钛复合载体，并采用XRD、N₂吸附-脱附、TEM和Py-IR对所制得样品的孔结构和表面酸性能进行了表征。结果表明，制备方法对含钛复合载体的存在形态有一定的影响；共沉淀法生成的含钛复合载体与γ-Al₂O₃的纤维状结构不同，呈均匀的球状微粒；共沉淀法制备的含钛复合载体的比表面积和孔容较小；含钛复合载体表面只有L酸位，且共沉淀法制备的含钛复合载体的酸性最弱。

关键词: 含钛复合载体,   ,  γ-Al₂O₃,    , 孔结构,    , 酸性