B - Operations – Transporting – 01 – J
Patent
B - Operations, Transporting
01
J
252/50, 252/88
B01J 23/68 (2006.01) B01D 53/94 (2006.01) B01J 23/652 (2006.01)
Patent
CA 1176229
ABSTRACT OF THE DISCLOSURE 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 the 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.
404401
Adams Karen M.
Gandhi Haren S.
Ford Motor Company Of Canada Limited
Sim & Mcburney
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