含锆ZSM-5分子筛上丙烯齐聚反应的研究  

Propene oligomerization over zirconium containing ZSM-5 zeolites

作　　者：李晓波[1] 胡津仙[1] 王锋[1] 任杰[1] 李永旺[1] 孙予罕[1] 

机构地区：[1]中国科学院山西煤炭化学研究所煤转化国家重点实验室

出　　处：《燃料化学学报》2004年第4期498-503,共6页Journal of Fuel Chemistry and Technology

基　　金：山西省自然科学基金(20031029)。~~

摘　　要：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3μm～5μm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。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 NH_3-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 NH_3-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 chain growth.

关 键 词：水热法 锆ZSM-5分子筛 齐聚 

分 类 号：TK16[动力工程及工程热物理—热能工程]