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以Ｈβ沸石为基础，通过ＴｉＯ_２改性及硫酸铵处理制备了ＳＯ－ＴｉＯ_２－Ｈβ－Ａｌ_２Ｏ_３催化剂，并由ＸＲＤ、ＸＰＳ、ＮＨ_３－ＴＰＤ、ＦＴＩＲ及化学吸附等手段考察了不同焙烧温度对该催化剂表面性质、酸性及催化性能的影响。结果表明：适宜的焙烧温度使ＳＯ－ＴｉＯ２－Ｈβ－Ａｌ２Ｏ３的酸量大幅度增加，强酸比例增大，并产生部分增强酸中心。高强度的酸性中心中，以Ｌ酸中心为主；５５０℃焙烧的样品能使沸石表面上ＳＯ与ＴｉＯ_２间发生较强的相互作用，高温焙烧则使浓度下降；该催化剂明显促进了丙烯与异丙醇的醚化反应，丙烯转化率由８．０％增高到１５．９％。关键词
Based on Hβ zeolite, SO-TiO_2-Hβ-Al_2O_3 catalysts were prepared by TiO_2 modification and ammonium sulfate treatment. The effects of calcination temperature on the surface of the catalyst were investigated by XRD, XPS, NH 3 -TPD, FTIR and chemical adsorption. Nature, acidity and catalytic properties. The results show that the optimum calcination temperature increases the acidity of SO-TiO2-Hβ-Al2O3, increases the proportion of strong acids and produces some enhanced acid sites. High-intensity acid centers are dominated by L acid sites. The sample calcined at 550 ℃ can make strong interaction between SO and TiO_2 on the zeolite surface and decrease the concentration at high-temperature calcination. Propanol alcohol etherification, propylene conversion increased from 8.0% to 15.9%. Key words