采用硫酸铵浸渍的方法制得了一系列硫酸盐化的催化剂,运用TG、BET比表面测定、XRD、Raman、FTIR和SO2-TPD技术对催化剂进行了表征,并对催化剂进行了克劳斯活性评价。结果表明,硫酸盐化会导致催化剂比表面积和孔体积减小但不会使催化剂形成新的晶型,硫酸盐的形成使TiO2表面碱性变弱,硫酸根在TiO2表面形成的双齿螯合结构会阻碍SO2和H2S与催化剂表面的接触,碱性变弱和双齿螯合结构的形成导致了催化剂克劳斯活性降低,另外,负载的硫酸盐的量越多催化剂的克劳斯活性越低。 A series of sulfated catalysts were prepared by impregnation with ammonium sulfate. The catalysts were characterized by TG, BET specific surface, XRD, Raman, FTIR and SO2-TPD techniques. The Claus activity was evaluated . The results show that sulfation can lead to the reduction of specific surface area and pore volume of the catalyst without the formation of new crystal form. The formation of sulfate weakens the alkaline surface of TiO2 and the bidentate chelate formed by the sulfate on TiO2 surface The structure hinders the contact of SO2 and H2S with the catalyst surface. The weak basicity and the formation of bidentate chelate structure lead to the decrease of Claus activity. In addition, the more the amount of sulfate loaded, the more Claus activity low.