A SEM-EDS study of new and used automotive catalysts

被引：53

作者：

Angelidis, TN ^{[1
]}

Sklavounos, SA ^{[1
]}

机构：

[1] ARISTOTELIAN UNIV THESSALONIKI,DEPT GEOL,GR-54006 THESSALONIKI,GREECE

来源：

APPLIED CATALYSIS A-GENERAL | 1995年 / 133卷 / 01期

关键词：

scanning electron microscopy; energy dispersive spectroscopy; automotive catalysts; inorganic contaminants distribution; rejuvenation;

D O I：

10.1016/0926-860X(95)00165-4

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：

Automotive catalyst deactivation by inorganic contaminants originating in engine oil and fuel is discussed. Scanning electron microscopy images and energy dispersive spectroscopy analysis were used to characterize the variation of contaminant relative concentrations in various types of used monolithic catalysts. The major contaminants were calcium, phosphorus, sulphur, lead, iron and zinc. All contaminants seems to have a cumulative time dependent effect, acting more as foulants than as poisons. Valuable information about the washcoat composition were derived. A preliminary acetic acid leaching test showed that a significant quantity of the contaminants may be easily removed from the catalyst surface.

引用

页码：121 / 132

页数：12