Poisoning of platinum-rhodium automotive three-way catalysts by lead and phosphorus

Journal Article · Sat Sep 01 04:00:00 EDT 1979 · Environ. Sci. Technol.; (United States)

DOI:https://doi.org/10.1021/es60157a016· OSTI ID:5485084

Williamson, W B; Stepien, H K; Watkins, W L.H.; Gandhi, H S

The activity and durability of platinum-rhodium three-way catalysts for light-duty motor vehicle exhaust control are determined as a function of lead and phosphorus poisoning, thermal aging, and platinum-rhodium catalyst composition. The catalysts are sensitive to even trace levels of lead. The catalysts do not show sensitivity to trace levels of phosphorus found in current unleaded fuels. Catalyst deactivation by lead was decreased when catalysts were operated at higher temperatures, which resulted in lower lead accumulation on the catalyst. However, catalyst operation at elevated temperatures may increase the chance of thermal deactivation by overheating from the engine exhaust. (3 graphs, 18 references, 6 tables)

• Research Organization: Ford Motor Co
• OSTI ID: 5485084
• Journal Information: Environ. Sci. Technol.; (United States), Journal Name: Environ. Sci. Technol.; (United States) Vol. 13:9; ISSN ESTHA
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330700 -- Advanced Propulsion Systems-- Emission Control
500200* -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
AUTOMOBILES
CATALYSTS
CATALYTIC EFFECTS
CONTROL
ELEMENTS
EXHAUST GASES
GASEOUS WASTES
LEAD
METALS
NONMETALS
PHOSPHORUS
PLATINUM
PLATINUM METALS
REFRACTORY METALS
RHODIUM
TRANSITION ELEMENTS
VEHICLES
WASTES