Influence of the tungsten oxide precursor on WOx-ZrO2 and Pt/WOx-ZrO2 properties

被引：71

作者：

Vaudagna, SR ^{[1
]}

Comelli, RA ^{[1
]}

Figoli, NS ^{[1
]}

机构：

[1] CONICET, UNL, FIQ, INCAPE,Inst Invest Catalisis & Petroquim, RA-3000 Santa Fe, Argentina

来源：

APPLIED CATALYSIS A-GENERAL | 1997年 / 164卷 / 1-2期

关键词：

tungsten oxide promoted zirconia; tungsten oxide precursor; platinum addition; n-hexane isomerization;

D O I：

10.1016/S0926-860X(97)00176-2

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：

The influence of the tungsten precursor and of the preparation conditions on the properties of platinum free or platinum containing WOx promoted zirconia has been studied. Catalysts were characterized by hydrogen chemisorption at room temperature, TPR, XRD and Laser Raman spectroscopy and during the n-hexane reaction at 200 degrees C, 6 kg cm(-2), and a hydrogen/n-hexane molar ratio 7. For all catalysts, the same WOx species were observed after calcination: crystalline WO3 and an amorphous WOx species were detected by Laser Raman. The best catalytic activity and stability were observed on catalysts in which platinum was added after calcination, independently of the WOx precursor used in the preparation. (C) 1997 Elsevier Science B.V.

引用

页码：265 / 280

页数：16

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