Physicochemical Characteristics of SAPO-34 Molecular Sieves Synthesized with Mixed Templates as MTO Catalysts

被引：30

作者：

Chae, Ho-Jeong ^{[1
]}

Park, In-Jung ^{[1
]}

Song, Young-Ha ^{[1
,2
]}

Jeong, Kwang-Eun ^{[1
]}

Kim, Chul-Ung ^{[1
]}

Shin, Chae-Ho ^{[2
]}

Jeong, Soon-Yong ^{[1
]}

机构：

[1] Korea Res Inst Chem Technol, Alternat Chem Fuel Res Ctr, Taejon 305600, South Korea

[2] Chungbuk Natl Univ, Dept Chem Engn, Cheongju 361763, Chungbuk, South Korea

来源：

JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY | 2010年 / 10卷 / 01期

关键词：

SAPO-34; Methanol to Olefins (MTO); Mixed Template; Crystal Morphology; SI DISTRIBUTION; LIGHT OLEFINS; METHANOL; CONVERSION; CRYSTALLIZATION; DIETHYLAMINE; MORPHOLINE; MECHANISM; ETHYLENE; AGENT;

D O I：

10.1166/jnn.2010.1487

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

In the present work, a variety of SAPO-34 catalysts have been prepared using various templates such as a single or mixtures of tetraethylammonium hydroxide (TEAOH), morpholine, diethylamine (DEA), triethylamine (TEA), dipropylamine (DPA), isopropylamine (IPA) and Diethanolamine (DEtA). It is shown that crystal morphology and physicochemical properties were affected by the kinds of templates and mixture contents. Especially, inexpensive SAPO-34 catalyst with good crystal properties and catalytic performance was obtained by using mixed template of IDEA and TEAOH. Through N-2 isotherm, XRD, SEM, NH3 TPD and Si-29-NMR techniques, the effect of mixed template on the crystal morphology, acidity and Si distribution were investigated. Catalytic activity and life stability of SAPO-34 in MTO reaction was improved by using mixed template because of the distinction of the crystal size, acidity and Si distribution.

引用

页码：195 / 202

页数：8

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