DISRUPTION OF THE MFI FRAMEWORK BY THE INCORPORATION OF GALLIUM

被引：31

作者：

KOSSLICK, H

TUAN, VA

PARLITZ, B

FRICKE, R

PEUKER, C

STOREK, W

机构：

[1] KAI EV,WISSENSCHAFTLER INTEGRATIONSPROGRAM,O-1199 BERLIN,GERMANY

[2] BAM,FED INST MAT RES & TESTING,O-1199 BERLIN,GERMANY

来源：

JOURNAL OF THE CHEMICAL SOCIETY-FARADAY TRANSACTIONS | 1993年 / 89卷 / 07期

关键词：

D O I：

10.1039/ft9938901131

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The influence of isomorphous substitution of silicon by gallium in the MFI framework on lattice crystallinity and defect sites is investigated. The Ga-ZSM-5 zeolites are characterized by XRD, n-hexane adsorption, IR, TPD of ammonia, TG-DTA, MAS NMR, and chemical analysis. The incorporation of the large gallium atom is found to be disruptive. It leads to greater lattice distortion. However, the number of lattice defects decreases with growing gallium content. The sum of lattice defects and incorporated gallium atoms is nearly unchanged. It is suggested that gallium atoms and defect sites are located at similar lattice positions.

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页码：1131 / 1138

页数：8

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