通过沉淀、回流、浸渍和焙烧等步骤制备了Al2O3/WO3/ZrO2固体强酸催化剂. 采用XRD, N2吸附, UV-Vis光谱, NH3-TPD和H2-TPR等技术测定了Al2O3对WO3/ZrO2催化剂的结构、表面酸性、氧化还原性及正丁烷异构化反应性能的影响. 结果表明,在WO3/ZrO2中引入适量的Al2O3对其表面酸强度及酸量无显著影响,但可使催化剂中的ZrO2组分以稳定的四方相形式存在,并能有效地抑制催化剂中WO3的聚集长大,从而提高催化剂的稳定性和正丁烷异构化的转化率和选择性. 添加铂于Al2O3/WO3/ZrO2中可进一步提高其催化性能. 还考察了催化剂的焙烧温度、Al含量、反应温度和反应气氛对正丁烷异构化反应的影响.
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