B - Operations – Transporting – 01 – J
Patent
B - Operations, Transporting
01
J
252/56
B01J 23/63 (2006.01) B01D 53/94 (2006.01)
Patent
CA 2011484
A catalyst composition includes a catalytic material containing a platinum catalytic component dispersed on a bulk ceria and a palladium catalytic component; the palla- dium catalytic component may be dispersed either on the ceria or on another support, such as an activated alumina support. The catalytic material, which may include a re- fractory binder, such as alumina, may be dispersed as a washcoat on a suitable carrier, e.g., a cordierite honey- comb-type carrier having a plurality of fine gas flow passages extending therethrough. The bulk ceria may be stabilized with a zirconia stabilizer and/or a lanthana stabilizer. The catalyst composition has utility as an oxidation catalyst and as a three-way conversion catalyst. In the latter case, its activity for the reduction of ni- trogen oxides may optionally be supplemented either by adding a rhodium-containing catalytic overcoat or by pro- viding a catalyst assembly in which the above-described catalyst composition is placed in series with any suitable nitrogen oxides reduction catalyst.
Dettling Joseph C.
Lui Yiu-Kwan
Engelhard Corporation
Sim & Mcburney
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