Synthesis of high-silica CHA type zeolite by interzeolite conversion of FAU type zeolite in the presence of seed crystals

被引：115

作者：

Itakura, Masaya ^{[1
]}

Goto, Ikuhiro ^{[1
]}

Takahashi, Atsushi ^{[2
]}

Fujitani, Tadahiro ^{[2
]}

Ide, Yusuke ^{[1
]}

Sadakane, Masahiro ^{[1
]}

Sano, Tsuneji ^{[1
]}

机构：

[1] Hiroshima Univ, Grad Sch Engn, Dept Appl Chem, Higashihiroshima 7398527, Japan

[2] Natl Inst Adv Ind Sci & Technol, Res Inst Innovat Sustainable Chem, Tsukuba, Ibaraki 3058569, Japan

来源：

MICROPOROUS AND MESOPOROUS MATERIALS | 2011年 / 144卷 / 1-3期

关键词：

Interzeolite conversion; FAU type zeolite; CHA type zeolite; Seed crystal; Ethanol conversion; HYDROTHERMAL CONVERSION; ALUMINOSILICATES; CHEMISTRY; METHANOL;

D O I：

10.1016/j.micromeso.2011.03.041

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

The influence of seed crystals on the interzeolite conversion of FAU type zeolite into CHA type zeolite was investigated in the presence of benzyltrimethylammonium hydroxide as a structure-directing agent under various hydrothermal synthesis conditions. Pure and highly crystalline CHA type zeolites with a wide range of Si/Al ratios were obtained in a shorter crystallization time as compared with those obtained without seed crystals. Furthermore, we achieved the first successful synthesis of high-silica CHA type zeolite in the absence of Na+ cations by increasing the seed content. The protonated CHA type zeolite with a Si/Al ratio of ca. 15 yielded the highest propylene yield of ca. 48 C-% in ethanol conversion into light olefins. (C) 2011 Elsevier Inc. All rights reserved.

引用

页码：91 / 96

页数：6

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