A study of platinum supported on tungstated zirconia catalysts

被引：52

作者：

Larsen, G ^{[1
]}

Lotero, E ^{[1
]}

Raghavan, S ^{[1
]}

Parra, RD ^{[1
]}

Querini, CA ^{[1
]}

机构：

[1] UNIV NACL LITORAL,INCAPE,RA-3000 SANTA FE,ARGENTINA

来源：

APPLIED CATALYSIS A-GENERAL | 1996年 / 139卷 / 1-2期

关键词：

platinum supported on tungsta-zirconia; n-butane isomerization; pyridine adsorption; temperature-programmed oxidation;

D O I：

10.1016/0926-860X(95)00330-4

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 reaction of n-butane with hydrogen at 573 K was studied over platinum supported on tungstated zirconia (PtWZ). A higher Pt dispersion increases the selectivity toward hydrogenolysis products and overall activity. The % coke after 90 min on stream at a H-2/n-C-4 ratio of 3 was found to be less than 0.1 wt.-% in all cases. The presence of Bronsted acid sites upon reduction is confirmed by diffuse reflectance infrared spectroscopy of adsorbed pyridine. The WO3/ZrO2 (WZ) support consists of a mixture of tetragonal and monoclinic zirconia and tetragonal tungsten oxide regardless of the presence of platinum.

引用

页码：201 / 211

页数：11

共 22 条

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