催化学报

催化学报 ›› 2007, Vol. 28 ›› Issue (10): 857-864.

• 研究论文 • 上一篇    下一篇

小晶粒SAPO-11分子筛的合成及其催化异构化性能

张胜振1,2,陈胜利1,董鹏1,纪智勇1,赵俊颖1,徐克琪1   

  1. 1 中国石油大学(北京)重质油国家重点实验室, 北京 102249; 2 大唐国际化工技术研究院有限公司, 北京 100070
  • 收稿日期:2007-10-25 出版日期:2007-10-25 发布日期:2011-10-28

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

ZHANG Shengzhen1,2, CHEN Shengli1*, DONG Peng1, JI Zhiyong1, Zhao Junying1, Xu Keqi1   

  1. 1 State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China; 2 Datang International Chemical Technology Research Institute, Datang International Power Generation Co., Ltd., Beijing 100070, China
  • Received:2007-10-25 Online:2007-10-25 Published:2011-10-28

PDF

1169

被引次数

65

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5～15 μm减小至400～500 nm; 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.

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

Abstract: 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 from7 to10 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.

Key words: SAPO-11 molecular sieve, aging treatment, static hydrothermal synthesis, n-hexadecane, hydroisomerization