Effect of calcination/rehydration treatments on the environment of V in β zeolite

被引：38

作者：

Dzwigaj, S ^{[1
]}

El Malki, EM ^{[1
]}

Peltre, MJ ^{[1
]}

Massiani, P ^{[1
]}

Davidson, A ^{[1
]}

Che, M ^{[1
]}

机构：

[1] Univ Paris 06, CNRS, UMR 7609, Lab React Surface, F-75252 Paris 05, France

来源：

TOPICS IN CATALYSIS | 2000年 / 11卷 / 1-4期

关键词：

beta zeolite; dealumination; vanadium; dehydroxylation; FT-IR; UV-visible; ESR; TPR; (51)V and (29)Si NMR;

D O I：

10.1023/A:1027219107921

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

A dealuminated zeolite beta has been contacted with solutions of ammonium metavanadate to incorporate vanadium as tetrahedral V species which are not removed under treatment with aqueous solution of ammonium acetate. The effects of calcination and rehydration on the environment of the V species have been studied by diffuse reflectance UV-visible and (51)V NMR. The reducibility of the V species has been followed by TPR and ESR. The dehydroxylation/rehydroxylation process occurring in the beta framework upon dehydration/rehydration has been monitored by (29)Si MAS NMR and FT-IR spectroscopy.

引用

页码：379 / 390

页数：12

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