堇青石蜂窝陶瓷载体上SAPO-34分子筛的原位合成  

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

作　　者：王爱琴[1] 梁东白[1] 唐军旺[1] 徐长海[1] 孙孝英[1] 张涛[1] 

机构地区：[1]中国科学院大连化学物理研究所,大连116023

出　　处：《高等学校化学学报》2000年第12期1801-1804,共4页Chemical Journal of Chinese Universities

基　　金：国家重点科技攻关项目基金 !(批准号 :96-5 44-0 2 -0 1)资助

摘　　要：运用水热合成技术在孔密度为 62 cells/cm2的堇青石蜂窝陶瓷载体上原位合成了 SAPO-3 4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 3 0μm的 SAPO-3 4分子筛 ,而相应的载体增重约为 1 5%～ 2 5% .改变合成条件还可使堇青石载体上同时生长 SAPO-3 4和 SAPO-5分子筛 .此外 ,对 SAPO-3SAPO 34 molecular sieves have been successfully synthesized onto the cordierite substrates by hydrothermal technique, and characterized by XRD and SEM methods. The results show that SAPO 34 layers with the thickness about 30 μm are evenly distributed onto the inner walls of the cordierite substrate, which results in a weight increase of 15%_25% of the substrate. The molar ratio of Et 3N/Al 2O 3 had an important effect on the nature of the molecular sieve product crystallized on the substrate. When n (Et 3N)/ n (Al 2O 3)=4.0 , pure SAPO 34 was crystallized on the cordierite substrate; whereas when n (Et 3N)/ n (Al 2O 3)=2.5 , a mixture product of SAPO 34 and SAPO 5 was 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. [WT5HZ]

关 键 词：堇青石 原位合成 整体催化剂 SPO-34分子筛 

分 类 号：TQ426.96[化学工程] O643.36[理学—物理化学]