HYDROTHERMAL STABILITY OF SILICA AS A SUPPORT FOR PLATINUM IN AN OXIDATION CATALYST

被引：26

作者：

AXELSSON, IM ^{[1
]}

LOWENDAHL, L ^{[1
]}

OTTERSTEDT, JE ^{[1
]}

机构：

[1] CHALMERS UNIV TECHNOL, DEPT ENGN CHEM 1, S-41296 GOTHENBURG, SWEDEN

来源：

APPLIED CATALYSIS | 1988年 / 44卷 / 1-2期

关键词：

Automobile Engines--Catalytic Converters - Chemical Reactions--Oxidation - Silica;

D O I：

10.1016/S0166-9834(00)80057-3

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：

Silica and alumina were subjected to hydrothermal treatment at 750°C for up to 48 h. The sodium content of silica had a strong influence on the stability towards sintering. Silica, containing 0.05 wt.% sodium, lost less of its original surface area than did alumina during the hydrothermal treatment. Light-off temperatures, and dependence of conversion of carbon monoxide to carbon dioxide over catalysts with platinum on wash-coats of alumina and silica on flow-rate, were determined before and after deactivation. Platinum on sodium-free silica had higher activity than platinum on alumina both before and after deactivation.

引用

页码：251 / 260

页数：10