Manufacture of b-Oriented ZSM-5/Silicalite-1 Core/Shell Structured Zeolite Catalyst

被引：6

作者：

Zhou, Yaxin ^{[1
]}

Tong, Weiyi ^{[1
]}

Zou, Wei ^{[1
]}

Qi, Xiaolan ^{[1
]}

Kong, Dejin ^{[1
]}

机构：

[1] SINOPEC, Shanghai Res Inst Petrochem Technol, Shanghai 201208, Peoples R China

来源：

SYNTHESIS AND REACTIVITY IN INORGANIC METAL-ORGANIC AND NANO-METAL CHEMISTRY | 2015年 / 45卷 / 09期

关键词：

oriented shell; MFI; pretreatment; para-selectivity; CORE-SHELL ZEOLITE; GROWTH; FABRICATION; COMPOSITES; OVERGROWTH; SEPARATION; MEMBRANE; CRYSTALS; BEHAVIOR; ALUMINA;

D O I：

10.1080/15533174.2013.862699

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

A b-oriented MFI shell was formed on the ZSM-5 crystal by pretreating the core using ammonia prior to the hydrothermal synthesis in tetrapropyl ammonium hydroxide medium. The effect of surface structure of the core material on synthesis of MFI/MFI zeolite was investigated. The surface Si-OH groups and amorphous aluminate may play an important role in forming the b-oriented coating. The shell composition changed from high-silica ZSM-5 to silicalite-1 after twice coating synthesis, while the shell coverage increased from 85% to 99%. In toluene methylation, the silicalite-1 shell not only prevented the deactivation of the catalyst, but also enhanced para-selectivity up to 61%.

引用

页码：1356 / 1362

页数：7

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