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公开(公告)号：CA3032207A1
公开(公告)日：2018-02-08
申请号：CA3032207
申请日：2017-07-25
Applicant: BASF CORP
Inventor： CRAVILLON JANOSCH , SIEMUND STEPHAN , SIANI ATTILIO , SCHMITZ THOMAS , KINNE MARKUS
Abstract: Catalyzed particulate filters comprise three-way conversion (TWC) catalytic material, which comprises rhodium as the only platinum group metal, that permeates walls of a particulate filter. Such catalyzed particulate filters may be located downstream of close-coupled three-way conversion (TWC) composites in an emission treatment system downstream of a gasoline direct injection engine for treatment of an exhaust stream comprising hydrocarbons, carbon monoxide, nitrogen oxides, and particulates.
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公开(公告)号：CA2796830A1
公开(公告)日：2011-10-27
申请号：CA2796830
申请日：2011-04-19
Inventor： ARNOLD MIRKO , SIEMUND STEPHAN , SIANI ATTILIO , WASSERMANN KNUT
Abstract: Provided are exhaust systems and components suitable for use in conjunction with gasoline engines to capture particulates in addition to reducing gaseous emission such as hydrocarbons, nitrogen oxides, and carbon monoxides. Exhaust treatment systems comprising a three-way conversion (TWC) catalyst located on a particulate filters are provided. Coated particle filters having washcoat loadings in the range of 1 to 4 g/ft result in minimal impact on back pressure while simultaneously providing TWC catalytic activity and particle trapping functionality to meet increasingly stringent regulations such as Euro 6, Sufficient to high levels of oxygen storage components (OSC) are also delivered on and/or within the filter. The filters can have a coated porosity that is substantially the same as its uncoated porosity. The TWC catalytic material can comprise a particle size distribution such that a first set of particles has a first d90 particle size of 7.5 µ?? or less and a second set of particles has a second d90 particle size of more than 7.5 µ??. Methods of making and using the same are also provided.
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