ADSORPTION AND XE-129 NMR OF XENON IN SILVER-EXCHANGED Y-ZEOLITES - APPLICATION TO THE LOCATION OF SILVER CATIONS

被引：36

作者：

GROSSE, R

GEDEON, A

WATERMANN, J

FRAISSARD, J

BODDENBERG, B

机构：

[1] UNIV EDINBURGH,LEHRSTUHL PHYS CHEM 2,OTTO HAHN STR 6,EDINBURGH EH8 9YL,MIDLOTHIAN,SCOTLAND

[2] UNIV PARIS 06,CNRS,URA 1428,CHIM SURFACES LAB,F-75230 PARIS 05,FRANCE

来源：

ZEOLITES | 1992年 / 12卷 / 08期

关键词：

XE-129; NMR; AG+ EXCHANGED Y-ZEOLITES; XENON ADSORPTION ISOTHERMS;

D O I：

10.1016/0144-2449(92)90154-H

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 adsorption isotherms and Xe-129 n.m.r. chemical shifts of xenon in silver-exchanged yAgNaY zeolites (y from 5 to 100%) after high-temperature (400-degrees-C) dehydration as well as subsequent oxidation were measured at 26-degrees-C. A three-site sorption model taking into account adsorbate-adsorbate interaction was developed that reproduces simultaneously the adsorption isotherms and the chemical shift vs. concentration curves up to xenon loadings of about 6 atoms/supercage. The upfield displacements of the chemical shifts in the silver-exchanged zeolites with respect to NaY are attributed to the interaction of xenon with a small portion of the supercage silver cations, probably those unlocalized or residing on crystallographic SIII sites.

引用

页码：909 / 915

页数：7

共 18 条

[1] DEPENDENCE OF ADSORPTION OF KRYPTON AND XENON BY CRYSTALS OF ZEOLITE LIX AND NAX ON PRESSURE AND TEMPERATURE [J].