Synthesis, characterization and catalytic properties of SAPO-34 synthesized using diethylamine as a template

被引：183
作者：
Liu, Guangyu [1 ,2 ]
Tian, Peng [1 ]
Li, Jinzhe [1 ,2 ]
Zhang, Dazhi [1 ,2 ]
Zhou, Fan [1 ,2 ]
Liu, Zhongmin [1 ]
机构：
[1] Chinese Acad Sci, Dalian Inst Chem Phys, Lab Appl Catalysis, Dalian 116023, Peoples R China
[2] Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China
来源：
MICROPOROUS AND MESOPOROUS MATERIALS | 2008年 / 111卷 / 1-3期
关键词：
synthesis; SAPO-34; diethylamine; hydrothermal stability; methanol-to-olefin (MTO);
D O I：
10.1016/j.micromeso.2007.07.023
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
SAPO-34 molecular sieve was successfully synthesized using diethylamine (DEA) as a template. The influence of template concentration and silica concentration on the synthesis were investigated. Pure SAPO-34 could be obtained when n(DEA)/n(Al2O3) >= 1.5 and n(SiO2)/n(Al2O3) > 0.1 in the synthesis gel. Further increase of DEA concentration in the starting gel [n(DEA)/n(Al2O3) > 3] has a negative effect on both crystallinity and crystal yield. The products were characterized by XRD, XRF, SEM, NMR, FT-IR, TG-DTA and nitrogen adsorption techniques. It was found that SAPO-34 synthesized with DEA as a template has the characteristic of high silicon incorporation and exhibits good thermal and hydrothermal stability. The catalytic performance of SAPO-34 was tested by methanol-to-olefin (MTO) reaction and high olefins (C2H4 + C3H6) selectivity was obtained. (C) 2007 Elsevier Inc. All rights reserved.
引用
收藏
页码：143 / 149
页数：7
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