Multinuclear MAS NMR investigation of zeolites reacted with chlorofluorocarbons

被引：7

作者：

Hannus, I

Kónya, Z

Lentz, P

Nagy, JB

Kiricsi, I

机构：

[1] Attila Jozsef Univ, Dept Appl Chem, H-6720 Szeged, Hungary

[2] Fac Univ Notre Dame Paix, Lab RMN, B-5000 Namur, Belgium

来源：

JOURNAL OF MOLECULAR STRUCTURE | 1999年 / 482卷

关键词：

multinuclear MAS NMR; Y-FAU zeolite; chlorofluorocarbons; hydrochlorofluorocarbon;

D O I：

10.1016/S0022-2860(98)00766-2

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：

Multinuclear ((23)Na, (27)Al, (29)Si, (13)C) MAS NMR techniques were used for investigation of surface reaction of Y-type zeolites with CFCs (CCl(4), CCl(3)F, CCl(2)F(2), CClF(3), CF(4)) and HCFC (CHClF(2)). The hydrogen containing derivative reacts slowly. Those possessing more than 2 F atoms can be regarded as stable unreactive materials. CCl(4), CCl(3)F, CCl(2)F(2) react strongly with the zeolites. The reaction of HCFC with zeolites has a different mechanism to the other CFCs tested. On the basis of multinuclear NMR results a mechanism is given for the decomposition of HCFC. (C) 1999 Elsevier Science B.V. All rights reserved.

引用

页码：359 / 364

页数：6

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