稀土修饰的丝光沸石分子筛催化剂结构及性能研究  

Study on structure and properties of HM modified by rare earth

作　　者：王会嫣[1] 汤恩旗[1] 刘希东[2] 

机构地区：[1]天津工业大学材料科学与化学工程学院,天津300160 [2]天津职业大学,天津300410

出　　处：《天津工业大学学报》2009年第2期56-58,62,共4页Journal of Tiangong University

摘　　要：采用离子交换法制备稀土金属修饰的分子筛催化剂,用扫描电镜/X射线能谱仪(SEM/EDS)、BET、FT-IR、XRD等方法对催化剂进行表征,并在微分反应器上考察了分子筛改性前后的催化性能.结果表明,NH4分子筛经稀土金属La、Ce改性后,分子筛的组成改变,酸性中心发生改变,催化剂比表面积增大,催化活性提高.Molecular sieves are modified by rare earth through ion-exchanging methods. The above catalysts are characterized by means of SEM/EDS （scanning electron microscope/energy dispersion spectrometer）, BET, FT-IR and XRD. The catalytic properties on isopropylation of naphthalene are carried out with fixed-bed flow microreactor. The results show that after modified by rare earth, the composition of NH4 molecular sieves and acid center change, and specific area of catalyst increases and its catalytic activity improves.

关 键 词：分子筛 稀土金属 SEM/EDS 微分反应器 

分 类 号：TQ426.64[化学工程]