Three-way catalyst performance using minimized rhodium loadings

Conference · Thu Jan 01 04:00:00 EST 1987

OSTI ID:5136422

Engler, B H; Koberstein, E; Volker, H

The reduction of precious metal usage especially the rhodium content for three-way catalysts application due to limited resources and high precious metal prices seems to be favoured worldwide. Various platinum-rhodium and palladium-rhodium catalysts with different precious metal loadings and increasing ratios as well as catalysts containing no rhodium, i.e. only platinum-palladium were evaluated. Engine dynamometer sweep data and vehicle tests (US FTP 75) indicated that several catalyst formulations exhibit three-way catalyst performance even after high temperature engine aging and severe laboratory oven air treatment. Thus, the application of three-way catalysts with improved alumina washcoat technology and reduced loadings of rhodium and platinum seems to be possible.

• OSTI ID: 5136422
• Report Number(s): CONF-871142-
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330701* -- Emission Control-- Nitrogen Oxides
330702 -- Emission Control-- Carbon Monoxide
AIR POLLUTION CONTROL
ALLOY SYSTEMS
ALLOYS
BINARY ALLOY SYSTEMS
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CATALYSTS
CATALYTIC CONVERTERS
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL COMPOSITION
CHEMICAL REACTION KINETICS
CONTROL
EMISSION
ENGINES
EQUIPMENT
HEAT ENGINES
INTERNAL COMBUSTION ENGINES
KINETICS
NITRIC OXIDE
NITROGEN COMPOUNDS
NITROGEN OXIDES
OXIDES
OXYGEN COMPOUNDS
PALLADIUM ALLOYS
PERFORMANCE
PLATINUM ALLOYS
PLATINUM METAL ALLOYS
POLLUTION CONTROL
POLLUTION CONTROL EQUIPMENT
REACTION KINETICS
RHODIUM ALLOYS