PROPERTIES OF NA IONS IN NAZSM-5 ZEOLITE

被引：17

作者：

OHGUSHI, T

KAWANABE, Y

机构：

[1] Department of Materials Science, Toyohashi University of Technology, Toyohashi

来源：

ZEOLITES | 1994年 / 14卷 / 05期

关键词：

NAZSM-5; TYPES OF NA+ ION; DIELECTRICS; 23NA MAS NMR; AFFINITY FOR WATER MOLECULE;

D O I：

10.1016/0144-2449(94)90109-0

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：

Properties of Na+ ions in ZSM-5 zeolite with a,ratio of Si/Al = 685 were studied by the methods of dielectrics and 23 Na MAS n.m.r. In both dielectric and MAS n.m.r. spectra, a single peak attributable to the Na+ ion was observed and it was concluded that there was a single type of Na+ ion in this zeolite, in contrast to the case for the zeolite with Si/Al = 13, which contained two types of Na+ ions. From the comparison of properties of both zeolites, it was found that the Na+ ion left in the present zeolite has the following properties in comparison with the Na+ ion lost: It has a larger activation energy for movement, less affinity for adsorbed water molecules, and a more uniform microscopic environment of its neighbors.

引用

页码：356 / 359

页数：4

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