COMBINATIONS OF PLATINUM AND PALLADIUM ON ALUMINA SUPPORTS AS OXIDATION CATALYSTS

被引：59
|
作者：
SKOGLUNDH, M [1 ]
LOWENDAHL, LO [1 ]
OTTERSTED, JE [1 ]
机构：
[1] CHALMERS UNIV TECHNOL, DEPT ENGN CHEM 1, S-41296 GOTHENBURG, SWEDEN
来源：
APPLIED CATALYSIS | 1991年 / 77卷 / 01期
关键词：
PLATINUM-PALLADIUM ALUMINA; XYLENE OXIDATION; HYDROTHERMAL TREATMENT; LIGHT-OFF TEMPERATURE; BIMETAL;
D O I：
10.1016/0166-9834(91)80019-S
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 effects of the total content of Pd + Pt, the mol-% ratio of Pd to Pt, hydrothermal treatment of the catalyst wash-coat, and the oxygen concentration on the light-off temperature, T50, for the complete oxidation of xylene isomers, propene, and carbon monoxide were studied. The alumina wash-coats were thermally treated at 500-degrees-C for 2 h in air or after the thermal treatment, hydrothermally treated at 814-degrees-C for 2 h in 100-% steam. The catalysts were impregnated with 5, 10, and 20-mu-mol of Pd + Pt per gram of catalyst. The mol-% ratio of Pd to Pt was varied in the range from 0:100 to 100:0. The light-off temperatures had a minimum at a Pd:Pt mol-% ratio of 80:20, and decreased with increasing total metals concentration, increasing oxygen concentration and hydrothermal treatment of the alumina wash-coat.
引用
收藏
页码：9 / 20
页数：12
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