NATURE OF THE ACTIVE-SITES IN H-ZSM-11 ZEOLITE MODIFIED WITH ZN(2+) AND GA(3+)

被引：39

作者：

ANUNZIATA, OA

PIERELLA, LB

机构：

[1] Centro de lnvestigaciones Tecnologicas, GRUCOM, Facultad Regional Cordoba, Universidad Tecnologica Nacional, Cordoba, 5016

来源：

CATALYSIS LETTERS | 1993年 / 19卷 / 2-3期

关键词：

ZEOLITES; ZN-ZSM-11; GA-ZSM-11; ACTIVE CENTERS; XRD; IR; TPAD;

D O I：

10.1007/BF00771749

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：

H-ZSM-11 zeolite modified with zinc and gallium by ion exchange was investigated using XRD, IR and TPD of ammonia. The modification of the material by zinc produced a lowering of the strong Bronsted acidic sites generating new and strong Lewis sites. Unlike zinc-zeolites, the gallium is localized preferentially on the outer surface of microcrystallites blocking a few Bronsted centers.

引用

页码：143 / 151

页数：9

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