Delphi Technologies, Inc.

Umicore Ag & Co Kg

Asec Manufacturing

Karl C C Kharas

Wenzhong Zhang

Heinz J Robota

In one embodiment, a particulate filter includes a housing and a substrate disposed within the housing, the substrate comprising a catalyst composition comprising a single crystalline phase multiple metal oxide comprising platinum, wherein the substrate is designed such that gas flowing through the substrate, passes through a walls in the substrate prior to exiting the substrate.

Particulate filter and method for treating soot

A method of NOx abatement comprising the steps of generating a gas stream containing hydrocarbons and NOx, maintaining the temperature of the gas stream within the range of about 150&deg; C. to about 550&deg; C., maintaining the residence time of said hydrocarbons upstream of a NOx abatement catalyst so as to reduce the rate of hydrocarbon oxidation, and contacting the gas stream with said NOx abatement catalyst.

Method of NOx abatement in high temperature lean NOx catalyst systems

A process for removal of carbon monoxide, hydrocarbons, and nitrogen oxides from the exhaust gas from lean-burn, diesel and other engines which produce exhaust gases containing excess oxygen is disclosed. An exhaust gas from an engine operating at an air-fuel ratio above about 18 is contacted with a multi-component catalyst having at least two catalytic components, each capable of reducing nitrogen oxides within a range of exhaust gas temperatures that is different from the range of exhaust gas temperatures within which each other component is capable of reducing nitrogen oxides. Oxidation of the remaining reducing gases is also accomplished. One example of a two catalytic component catalyst of this invention has a first component of Au supported on alumina, which reduces nitrogen oxides at exhaust gas temperatures between about 600&deg; C. and 900&deg; C., and a second component of Pt supported on Y-zeolite, which reduces nitrogen oxides at exhaust gas temperatures below 600&deg; C.; an example of a three catalytic component catalyst of this invention has a first component of CoO supported on &ggr;-alumina, which reduces nitrogen oxides at exhaust gas temperatures above about 475&deg; C., a second component of an alloy of Pt, Rh and Co supported on BaO -stabilized &dgr;-alumina, which reduces nitrogen oxides at exhaust gas temperatures between about 315&deg; C. and about 475&deg; C. and a third component of an alloy of Pt and Rh supported on &ggr;-alumina, which reduces nitrogen oxides at exhaust gas temperatures between about 200&deg; C. and about 425&deg; C.

Reduction of NOx in the exhaust from leanOx internal combustion engines

The present invention relates to catalyst support comprising an inorganic oxide, preferably alumina, and zeolite in the proton form and having a high Si/Al ratio, wherein the zeolite is selected from those protonated zeolites that would exhibit a high Na/Al mole ratio if treated with a solution of sodium nitrate until all sites that will accept a sodium ion have done so. This invention also relates to catalyst that is made from such support, to a method of treating exhaust gas from &ldquo;lean-burn&rdquo; engines using catalyst of this invention, and to a method for determining if a zeolite is a suitable support component.

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Tulsa, OK, United States of America

Karl C C Kharas