On the localization of tetrahedral aluminum in MCM-22 zeolite

被引：40

作者：

Mériaudeau, P ^{[1
]}

Tuel, A ^{[1
]}

Vu, TTH ^{[1
]}

机构：

[1] Inst Rech Catalyse, CNRS, F-69626 Villeurbanne, France

来源：

CATALYSIS LETTERS | 1999年 / 61卷 / 1-2期

关键词：

MCM-22; Al-27 2D-5Q MAS NMR; dealumination;

D O I：

10.1023/A:1019091915381

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 distribution of aluminum in MCM-22 zeolite has been studied by Al-27 solid-state nuclear magnetic resonance. Three different aluminum species in tetrahedral position were observed. Surface selective dealumination with oxalic acid causes the disappearance of one of the NMR signals at 50.5 ppm. The corresponding species have been attributed to aluminum atoms located in the 12-T large cavities located on the external surface of the zeolite crystals.

引用

页码：89 / 92

页数：4

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