高等学校化学学报 ›› 2000, Vol. 21 ›› Issue (12): 1801.

• 论文 • 上一篇    下一篇

堇青石蜂窝陶瓷载体上SAPO-34分子筛的原位合成

王爱琴, 梁东白, 唐军旺, 徐长海, 孙孝英, 张涛   

  1. 中国科学院大连化学物理研究所, 大连 116023
  • 收稿日期:1999-12-01 出版日期:2000-12-24 发布日期:2000-12-24
  • 通讯作者: 梁东白(1935年出生),男,研究员,博士生导师,从事多相催化研究.
  • 基金资助:

    国家重点科技攻关项目基金(批准号:96-544-02-01)资助

In-Situ Synthesis of SAPO-34 Molecular Sieves on Monolithic Cordierite Substrates

WANG Ai-Qin, LIANG Dong-Bai, TANG Jun-Wang, XU Chang-Hai, SUN Xiao-Ying, ZHANG Tao   

  1. Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
  • Received:1999-12-01 Online:2000-12-24 Published:2000-12-24

摘要: 运用水热合成技术在孔密度为62cells/cm2的堇青石蜂窝陶瓷载体上原位合成了SAPO-34分子筛,并用XRD和SEM等技术对其进行了表征.结果表明,经过一次水热合成,堇青石蜂窝陶瓷载体的表面上可牢固均匀地生长一层厚度约为30μm的SAPO-34分子筛,而相应的载体增重约为15%~25%.改变合成条件还可使堇青石载体上同时生长SAPO-34和SAPO-5分子筛.此外,对SAPO-34分子筛在堇青石载体上的生长机理也作了初步探讨.

关键词: 堇青石, 原位合成, 整体催化剂, 分子筛层, SAPO-34, SAPO-5

Abstract: SAPO-34 molecular sieves have been successfully synthesized onto the cordierite substrates by hydrothermal technique, and characterized by XRDand SEMmethods.The results show that SAPO-34 layers with the thickness about30μm are evenly distributed onto the inner walls of the cordierite substrate, which results in a weight increase of15%_25% of the substrate.The molar ratio of Et3N/Al2O3had an important effect on the nature of the molecular sieve product crystallized on the substrate.When n SAPO-34 was crystallized on the cordierite substrate; whereas when n (Et3N)/n (Al2O3)=2.5 , a mixture product of SAPO-34 and SAPO5was formed on the substrate.In order to explore the mechanism of SAPO-34 formation on the cordierite substrate, the changes of the crystallization process on the substrate as well as in the solution has also been investigated

Key words: Cordierite, In situ synthesis, Monolithic catalysts, Zeolite layer, SAPO-34, SAPO-5

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