SO2-4/ZrO2-SiO2催化剂的结构及其形成过程

The structure and the forming process of SO42-/ZrO2-SiO2 catalysts were investigated by TG and DTA. The restraint of silica to the crystallization of the catalysts and the relations of weight loss temperature and loss amount of sulfur oxide bonded to the surface of the catalysts with the contents of zirconia were revealed by experimental results. The forming process of the catalysts was also explored by these techniques, some very important information, which will be useful for understanding the structure and properties of catalysts, were obtained.     

SO2-4/ZrO2-SiO2催化剂的结构及其形成过程

The structure and the forming process of SO2-4/ZrO2-SiO2 catalysts were investigated by TG and DTA.The restraint of silica to the crystallization of the catalysts and the relations of weight loss temperature and loss amount of sulfur oxide bonded to the surface of the catalysts with the contents of zirconia were revealed by experimental results.The forming process of the catalysts was also explored by these techniques,some very important information,which will be useful for understanding the structure and properties of catalysts,were obtained.     

SO_4~(2-)/ZrO_2-SiO_2催化剂的结构及其形成过程

ＳＯ４２ - ／ＺｒＯ２ ＳｉＯ２ 催化剂是９０年代出现的一种新型复合超强酸催化剂［１ -３］,它具有比表面积高、酸量大、制备成本低等显著的优点．热分析技术是研究硫酸促进型超强酸催化剂的重要工具．８０年代以来 ,许多研究者曾采用热分析技术对ＳＯ４／ＺｒＯ２ 等催化剂的结构及其形成过程进行了研究［４ -６］,所得到的结果为揭开这类催化剂的结构和形成机理起到了重要的作用．本文采用ＴＧＡ／ＤＴＡ技术对该催化剂的结构及其酸性结构的形成过程进行了研究 ,结果揭示了催化剂的组成与结晶温度的关系、催化剂中ＳＯ４２ - 基团与Ｚ…