Method of using a simplified low cost catalyst system

Patent · Tue Jun 21 04:00:00 EDT 1983

OSTI ID:5710666

Adams, K M; Gandhi, H S

There is disclosed a method of using an exhaust gas catalyst for treatment of exhaust gases developed by burning a hydrocarbon based fuel in an internal combustion engine. These exhaust gases contain varying amounts of unburned hydrocarbons, carbon monoxide and oxides of nitrogen depending upon the operating conditions of the internal combustion engine. This specification teaches use of an improved catalyst composition in which a support medium is provided for supporting the catalyst system, the support medium having an upstream support portion and a downstream support portion over which the exhaust gases pass in succession. The upstream support portion of the support medium has palladium deposited thereon and the downstream support portion of the support medium has tungsten deposited thereon. The catalyst system has particular utility as a three-way catalyst operating at approximately stoichiometric conditions or as a catalyst for use in conjunction with the fast burn engines or as an oxidation catalyst.

• Assignee: Ford Motor Co.
• Patent Number(s): US 4389382
• OSTI ID: 5710666
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330100 -- Internal Combustion Engines
330700* -- Advanced Propulsion Systems-- Emission Control
AIR POLLUTION CONTROL
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
CATALYSIS
CATALYST SUPPORTS
CHALCOGENIDES
CONTROL
ELEMENTS
ENGINES
EXHAUST GASES
FLUIDS
FUELS
GASEOUS WASTES
GASES
GASOHOL
HEAT ENGINES
INTERNAL COMBUSTION ENGINES
LIQUID FUELS
METALS
OXIDES
OXYGEN COMPOUNDS
PALLADIUM
PLATINUM METALS
POLLUTION CONTROL
TRANSITION ELEMENTS
TUNGSTEN
WASTES