XE-129 AND C-13 PFG NMR-STUDY OF THE INTRACRYSTALLINE SELF-DIFFUSION OF XE, CO2, AND CO

被引：74

作者：

KARGER, J ^{[1
]}

PFEIFER, H ^{[1
]}

STALLMACH, F ^{[1
]}

FEOKTISTOVA, NN ^{[1
]}

ZHDANOV, SP ^{[1
]}

机构：

[1] ACAD SCI ST PETERBURG,GREBENSHCHICOV INST,ST PETERSBURG,RUSSIA

来源：

ZEOLITES | 1993年 / 13卷 / 01期

关键词：

PULSED-FIELD GRADIENT (PFG) NMR; INTRACRYSTALLINE SELF-DIFFUSION; NAX; NACAA; ZSM-5;

D O I：

10.1016/0144-2449(93)90022-U

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：

Using Xe-129 and C-13 PFG n.m.r., the temperature dependence of the coefficients of self-diffusion of xenon, carbon monoxide, and carbon dioxide in zeolites X, NaCaA, and ZSM-5 (silicalite) are studied. In all cases, the measured diffusivities are found to follow an Arrhenius dependence. The determined activation energies and preexponential factors may be rationalized by relating specific properties of the sorbate gases (kinetic diameter, permanent electrostatic moments) to those of the considered zeolites (free diameter of the pores, cation content).

引用

页码：50 / 55

页数：6

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