MCM-41/γ-Al_2O_3复合材料的合成和表征  

Synthesis and characterization of MCM-41/γ-Al_2O_3 composite

作　　者：黄伟莉[1] 刘百军[1] 孙发民[2] 张志华[2] 鲍晓军[1] 高山松[1] 

机构地区：[1]中国石油大学中国石油天然气集团公司催化重点实验室,北京102249 [2]中国石油天然气股份有限公司大庆石化公司研究院,黑龙江大庆163714

出　　处：《中国石油大学学报（自然科学版）》2006年第1期129-133,137,共6页Journal of China University of Petroleum(Edition of Natural Science)

摘　　要：采用在-γAl2O3表面附晶生长的方法合成了MCM-41/-γAl2O3复合材料,考察了表面活性剂用量、投料硅铝比、合成母液pH值等对复合材料中MCM-41结晶度的影响。结果表明,在n(CTMABr)/n(SiO2)大于0.32、硅铝比大于4.68及合成母液pH值为10.5的条件下,合成的MCM-41/-γAl2O3复合材料中MCM-41的结晶度接近Si-MCM-41。X射线衍射、扫描电子显微镜、透射电子显微镜和低温N2吸附脱附表征结果表明,MCM-41/-γAl2O3是由MCM-41生长于-γAl2O3的表面而形成的复合材料。MCM-41/-γAl2O3复合材料中的MCM-41具有较高的热稳定性。A novel MCM-41/γ-Al2O3 composite was obtained by overgrowth of MCM-41 on the surface of γ-Al2O3. The effects of surfactant amount, ratio of n （Si） to n （Al） in the feed and pH value of synthesis mother liquid on crystallinity of MCM-41 in composite were investigated. The results indicate that the crystallinity of MCM-41 in composite, in the conditions of ratio of n （CTMABr） to n （SiO2） greater than 0.32, ratio of n （Si） to n （Al） greater than 4.68 and pH value equal to 10.5, was similar to that of Si-MCM-41. The composite was characterized by means of X-ray diffraction, scanning electron microscopy, transmission electron microscopy and low temperature nitrogen adsorption-desorption techniques. The results show that MCM-41/γ-Al2O3 is a composite with MCM-41 overgrowing on the surface of γ-Al2O3 and MCM-41 in composite is thermally stable.

关 键 词：MCM-41/γ-Al2O3复合材料 附晶生长 合成 表征 

分 类 号：TE624.95[石油与天然气工程—油气加工工程]