磷修饰高硅ZSM-5球形催化剂的甲醇制丙烯反应性能  

Phosphorous Modified High Silica ZSM-5 Spherical Catalyst and Its Reaction on Methanol to Propylene

作　　者：姜坤[1] 严丽霞[1] 虞贤波[1] 王靖岱[1] 阳永荣[1] 

机构地区：[1]浙江大学化学工程与生物工程学系,浙江杭州310027

出　　处：《北京理工大学学报》2011年第10期1247-1251,共5页Transactions of Beijing Institute of Technology

基　　金：国家自然科学基金-石油化工联合基金资助项目(20736011)

摘　　要：通过浸渍法制备了磷改性的高硅ZSM-5球形催化剂.采用XRD,BET,NH3-TPD等手段对催化剂进行了表征.结果表明,磷化合物均匀地负载在催化剂表面,且进入了分子筛晶内孔道,磷的引入对分子筛骨架没有明显影响,但会导致孔道内表面脱铝,磷修饰后催化剂强酸中心明显消失,弱酸位有所增加.磷修饰高硅ZSM-5催化剂的甲醇转化反应结果表明,高硅ZSM-5催化剂内的磷化合物可以有效地抑制氢转移反应,但对重组分影响较小,磷引入后丙烯选择性明显增加但甲醇转化率下降,过量负载的磷化合物导致催化剂活性迅速降低.Phosphorous modified high silica ZSM-5 catalysts were synthesized by infusion method. XRD BET and NH3-TPD results showed that phosphorous compounds were loaded uniformly on the surface of catalyst and de-aluminated pore surface was observed. The strong acids of phosphorous modified catalyst decreased and the weak acids increased. It also revealed from the results of methanol to propylene reaction that the phosphorous compounds in high silica ZSM- 5 catalysts could suppress the hydrogen transfer reaction and increase the propylene selectivity. But the activity of catalysts would decrease rapidly when the phosphorous was over-loaded.

关 键 词：磷 高硅 ZSM-5 甲醇制丙烯 

分 类 号：TQ325.1[化学工程—合成树脂塑料工业]