Deactivation of a platinum monolithic carbon/hydrocarbon oxidation catalyst

Journal Article · Sun Sep 01 00:00:00 EDT 1974 · Ind. Eng. Chem., Prod. Res. Dev.; (United States)

DOI:https://doi.org/10.1021/i360051a003· OSTI ID:7340565

Liederman, D; Voltz, S E; Snyder, P W

The effects of aging on the carbon monoxide/hydrocarbon oxidation activity and important physical properties of a platinum monolithic catalyst were determined. Catalyst samples were aged to 25,000 equivalent miles at a maximum temperature of 1450 F with unleaded fuel on an engine dynamometer. The activity for the oxidation of carbon monoxide, propylene, and engine exhaust gas hydrocarbons decreased rapidly during the first 1000-1500 miles with very little additional deactivation during further aging. A large decrease in propane oxidation activity continued throughout the 25,000 miles of aging. The growth of very large platinum crystallites appeared to be a primary cause of catalyst deactivation. No significant changes in surface area or solid-state phase composition were noted. Small amounts of lead were detected on aged catalyst samples.

• OSTI ID: 7340565
• Journal Information: Ind. Eng. Chem., Prod. Res. Dev.; (United States), Journal Name: Ind. Eng. Chem., Prod. Res. Dev.; (United States) Vol. 13:3; ISSN IEPRA
• Country of Publication: United States
• Language: English

Related Subjects

500200* -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
AIR POLLUTION
ALKENES
CARBON
CATALYSTS
CHEMICAL REACTIONS
CONTROL
DEACTIVATION
ELEMENTS
ENVIRONMENTAL EFFECTS
EXHAUST GASES
FUELS
GASEOUS WASTES
HYDROCARBONS
LEAD
METALS
NONMETALS
ORGANIC COMPOUNDS
OXIDATION
PLATINUM
PLATINUM METALS
POLLUTION
PROPYLENE
TRANSITION ELEMENTS
WASTES