含锆ZSM-5分子筛上丙烯齐聚反应的研究

以正丁胺(NBA)为模板剂，通过水热法直接合成了Zr/ZSM-5分子筛。XRD分析表明Zr/ZSM-5分子筛结晶度良好，但衍射峰的强度稍有差别。SEM显示样品分子筛表面规整，为3 μm～5 μm的棒状晶体。采用NH3-TPD法对分子筛进行了酸性测试，结果表明，在锆质量分数0.2%～1.2%，分子筛的中强酸和强酸量随锆质量分数的增加而增大，并向高温方向偏移。丙烯齐聚催化反应的活性评价结果显示，中强酸和强酸的量对Zr/HZSM-5催化性能有显著影响，在反应过程中对链的增长起促进作用。

Propene oligomerization over zirconium containing

Zr/HZSM-5 zeolites were synthesized by hydrothermal method with water glass, aluminum sulfate, zirconium nitrate and n-butylamine (NBA) as the template. The synthesized samples have been characterized by XRD, SEM and NH3-TPD. The results of XRD indicate that the Zr/HZSM-5 is regularly ZSM-5 zeolite and the introducing of zirconium atom changed the size of unit cell. The SEM photographs show that the granule was a well crystallized claviform crystal about 3 μm～5 μm in length. The NH3-TPD curves show that the number of medium acid and strong acid sites increased almost linearly with the content of zirconium. Propene oligomerization reaction was carried out over the samples to evaluate the catalytic properties of Zr/ZSM-5 zeolites. The catalytic capability of Zr/HZSM-5 changed with varying of the number of medium acid and strong acid sites, which can accelerate the increasing of chain.