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Title: Catalysts to reduce NO.sub.x in an exhaust gas stream and methods of preparation

Abstract

Catalysts, systems and methods are described to reduce NO.sub.x emissions of an internal combustion engine. In one embodiment, an emissions treatment system for an exhaust stream is provided having a catalyst comprising silver and a platinum group metal on a particulate alumina support, the atomic fraction of the platinum group metal being less than or equal to about 0.25. Methods of manufacturing catalysts are described in which silver is impregnated on alumina particles.

Inventors:
 [1];  [2];  [3];  [4];  [5];  [6]
  1. Ringoes, NJ
  2. Princeton, NJ
  3. Basking Ridge, NJ
  4. Hamilton, NJ
  5. Troy, MI
  6. Shelby Township, MI
Issue Date:
Research Org.:
General Motors Corporation
Sponsoring Org.:
USDOE
OSTI Identifier:
1018204
Patent Number(s):
7943548
Application Number:
11/533,593
Assignee:
BASF Corporation (Florham Park, NJ)
Patent Classifications (CPCs):
B - PERFORMING OPERATIONS B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL B01D - SEPARATION
Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE Y02T - CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
DOE Contract Number:  
FC26-02NT41218
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
33 ADVANCED PROPULSION SYSTEMS

Citation Formats

Castellano, Christopher R, Moini, Ahmad, Koermer, Gerald S, Furbeck, Howard, Schmieg, Steven J, and Blint, Richard J. Catalysts to reduce NO.sub.x in an exhaust gas stream and methods of preparation. United States: N. p., 2011. Web.
Castellano, Christopher R, Moini, Ahmad, Koermer, Gerald S, Furbeck, Howard, Schmieg, Steven J, & Blint, Richard J. Catalysts to reduce NO.sub.x in an exhaust gas stream and methods of preparation. United States.
Castellano, Christopher R, Moini, Ahmad, Koermer, Gerald S, Furbeck, Howard, Schmieg, Steven J, and Blint, Richard J. Tue . "Catalysts to reduce NO.sub.x in an exhaust gas stream and methods of preparation". United States. https://www.osti.gov/servlets/purl/1018204.
@article{osti_1018204,
title = {Catalysts to reduce NO.sub.x in an exhaust gas stream and methods of preparation},
author = {Castellano, Christopher R and Moini, Ahmad and Koermer, Gerald S and Furbeck, Howard and Schmieg, Steven J and Blint, Richard J},
abstractNote = {Catalysts, systems and methods are described to reduce NO.sub.x emissions of an internal combustion engine. In one embodiment, an emissions treatment system for an exhaust stream is provided having a catalyst comprising silver and a platinum group metal on a particulate alumina support, the atomic fraction of the platinum group metal being less than or equal to about 0.25. Methods of manufacturing catalysts are described in which silver is impregnated on alumina particles.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2011},
month = {5}
}

Works referenced in this record:

Selective reduction of NO on Ag/Al2O3 catalysts prepared from boehmite needles
journal, October 1998


Catalytic reduction system of NOx in exhaust gases from diesel engines with secondary fuel injection
journal, August 1998