不同形貌MCM-22分子筛的合成及其催化性能  

Synthesis and Catalytic Properties of MCM-22Zeolites With Different Morphologies

作　　者：王振东[1] 张云贤 张斌[1,3] 孙洪敏[1] 杨为民[1] 

机构地区：[1]中国石化上海石油化工研究院,上海201208 [2]上海师范大学化学系,上海200234 [3]华东师范大学化学系上海市绿色化学与化工过程绿色化重点实验室,上海200062

出　　处：《石油学报（石油加工）》2014年第1期110-114,共5页Acta Petrolei Sinica(Petroleum Processing Section)

摘　　要：在MCM-22分子筛的合成中,通过调节水热晶化参数、改变硅源及搅拌条件,得到了具有片状、饼状、球形且晶粒尺寸不同的MCM-22分子筛,采用XRD、SEM和氮气物理吸附对样品进行表征,并考察了其在连续固定床苯与乙烯液相烷基化反应及在1,3,5-三异丙苯裂解反应中的催化性能。结果表明,MCM-22分子筛的形貌对其催化性能影响显著,晶粒尺寸越大、聚集程度越高,其在苯烷基化反应和1,3,5-三异丙苯裂解反应中的催化性能越差。MCM-22 zeolite samples with different sizes and morphologies,such as sheet-like,platelet-like,spherical,were synthesized under different rotational or static conditions and with different Si sources.XRD,SEM,N2 adsorption,alkylation reaction of benzene with ethylene and catalytic cracking of 1,3,5-triisopropylbenzene were carried out to characterize the physico-chemical properties and catalytic performance of the synthesized MCM-22 samples.The results showed that the catalytic performance of MCM-22 zeolite was affected by its morphology.The bigger the crystalline size and the higher the assembly degree were,the worse the catalytic performance of MCM-22 was.

关 键 词：MCM-22 分子筛 乙苯 烷基化 形貌 

分 类 号：O643[理学—物理化学]