小晶粒SAPO-11分子筛的合成及其催化异构化性能  

Synthesis and Catalytic Hydroisomerization Performance of SAPO-11 Molecular Sieve with Small Crystals

作　　者：张胜振[1] 陈胜利[1] 董鹏[1] 纪智勇[1] 赵俊颖[1] 徐克琪[1] 

机构地区：[1]中国石油大学(北京)重质油国家重点实验室

出　　处：《催化学报》2007年第10期857-864,共8页

基　　金：中国石油天然气股份公司科技风险创新基金

摘　　要：在常规静态水热法的基础上,不使用除有机模板剂以外的其它有机物,通过调整反应物凝胶的老化处理条件,可以合成出结晶良好的小晶粒SAPO-11分子筛,晶粒尺寸由常规方法合成的5～15μm减小至400～500nm;采用改进方法合成的小晶粒SAPO-11分子筛具有较大的外比表面积.小晶粒Pt/SAPO-11分子筛催化剂对正十六烷临氢异构化反应的活性和选择性均明显高于常规方法合成的催化剂.On the basis of the conventional hydrothermal method, the small crystal SAPO-11 molecular sieves with sub-micron size were synthesized by controlling the aging conditions of the synthesis gel and without using other organic additives except for the template. The particles of the samples synthesized by this method possessed much smaller crystal dimension and were more uniform in size than conventionally synthesized samples. The crystal morphology of SAPO-11 samples synthesized by the improved hydrothermal method exhibited in cube shape with particle size in the range of 400 - 500 nm, whereas for the SAPO-11 samples synthesized by the conventional method, pseudo-spherical aggregates ranging from 7 to 10 μm were obtained. The sample synthesized by the improved method had larger BET surface area and larger external surface area than that of the samples prepared by the conventional hydrothermal method. The results of n-hexadecane hydroisomerization showed that the Pt/SAPO-11 catalysts synthesized by the improved method exhibited both higher catalytic activity and higher hydroisomerization selectivity than the catalysts synthesized by the conventional hydrothermal method.

关 键 词：SAPO-11分子筛 老化处理 静态水热合成 正十六烷 临氢异构化 

分 类 号：O643.36[理学—物理化学]