Catalytic process for minimizing the H sub 2 S emissions from automotive exhaust

Patent · Tue Apr 16 00:00:00 EDT 1991

OSTI ID:5117361

Joy, III, G C; Lester, G R; Marinangeli, R E

This patent describes a method of minimizing the formation of hydrogen sulfide when automotive exhaust is contacted with a catalytic composite comprising contacting the exhaust with a catalytic composite. It comprises a primary refractory inorganic oxide support having dispersed thereon at least one of a first active component selected from the group consisting of rare-earth oxides and a secondary refractory inorganic oxide support selected from the group consisting of zirconia, titania, ceria, silica, magnesia, natural and synthetic zeolites having dispersed thereon at least one of a second active component which is an oxide of a metal, the metal selected from the group of metals which form a stable sulfide under fuel rich conditions, the second active component which is dispersed on the secondary support before formation of the mixture to effect a separation between the second active component and the primary support, and the mixture having at least one main catalytic metal selected from the group consisting of platinum, palladium, rhodium, ruthenium and iridium deposited thereon.

• Assignee: Allied-Signal, Inc., Morris Township, Morris County, NJ (USA)
• Patent Number(s): US 5008090; A
• Application Number: PPN: US 7-197172
• OSTI ID: 5117361
• Resource Relation: Patent File Date: 23 May 1988
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
33 ADVANCED PROPULSION SYSTEMS
54 ENVIRONMENTAL SCIENCES
CATALYSTS
CHEMICAL COMPOSITION
EXHAUST GASES
DESULFURIZATION
HYDROGEN SULFIDES
REMOVAL
INTERNAL COMBUSTION ENGINES
CATALYTIC CONVERTERS
AIR POLLUTION CONTROL
OXIDES
CHALCOGENIDES
CHEMICAL REACTIONS
CONTROL
ENGINES
EQUIPMENT
FLUIDS
GASEOUS WASTES
GASES
HEAT ENGINES
HYDROGEN COMPOUNDS
OXYGEN COMPOUNDS
POLLUTION CONTROL
POLLUTION CONTROL EQUIPMENT
SULFIDES
SULFUR COMPOUNDS
WASTES
020800* - Petroleum- Waste Management
330700 - Advanced Propulsion Systems- Emission Control
540120 - Environment
Atmospheric- Chemicals Monitoring & Transport- (1990-)