Multi-component filters for emissions control

Patent metadata

Field	Value
Publication number	US-9145809-B2
Application number	US-201414247206-A
Country	US
Kind code	B2
Filing date	Apr 7, 2014
Priority date	Mar 29, 2011
Publication date	Sep 29, 2015
Grant date	Sep 29, 2015

Abstract

Catalytic articles, systems and methods for treating exhaust gas streams are described. A catalytic article comprising a wall flow filter having gas permeable walls, a hydrolysis catalyst, an optional soot oxidation catalyst, a selective catalytic reduction catalyst permeating the walls, an ammonia oxidation catalyst and an oxidation catalyst to oxidize CO and hydrocarbons is described. Methods of treating exhaust gas streams comprising soot, an ammonia precursor such as urea, ammonia, NO x , CO and hydrocarbons are also provided.

First claim

What is claimed is:

1. A catalytic article to remove emissions from a gas stream containing soot, ammonia, an ammonia precursor, NO x , CO and hydrocarbons, the article comprising:
a wall-flow filter for trapping soot in the gas stream, the filter having an inlet end and an outlet end defining an overall length, gas permeable walls having a thickness formed into a plurality of axially extending inlet channels and outlet channels, each inlet channel having inlet walls, an open inle…

Assignees

• Basf Corp

Inventors

• Boorse R Samuel

Classifications

• F01N2570/18

  Mechanical Engineering · mapped topic

• B01D53/9468

  Operations & Transport · mapped topic

• F01N3/2066

  Mechanical Engineering · mapped topic

• B01D53/9445

  Operations & Transport · mapped topic

• F01N3/106 Primary

  Mechanical Engineering · mapped topic