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Title: Method and apparatus to selectively reduce NO.sub.x in an exhaust gas feedstream

Abstract

A method and apparatus are described to selectively reduce NO.sub.x emissions of an internal combustion engine. An exhaust aftertreatment system includes an injection device operative to dispense a hydrocarbon reductant upstream of a silver-alumina catalytic reactor device. A control system determines a NO.sub.x concentration and hydrocarbon/NOx ratio based upon selected parameters of the exhaust gas feedstream and dispenses hydrocarbon reductant during lean engine operation. Included is a method to control elements of the feedstream during lean operation. The hydrocarbon reductant may include engine fuel.

Inventors:
 [1];  [2];  [3];  [4];  [5]
  1. Troy, MI
  2. Shelby Township, MI
  3. Sterling Heights, MI
  4. Macomb Township, MI
  5. Rochester Hills, MI
Issue Date:
Research Org.:
GM Global Technology Operations LLC (Detroit, MI)
Sponsoring Org.:
USDOE
OSTI Identifier:
1023934
Patent Number(s):
8006481
Application Number:
11/533,434
Assignee:
GM Global Technology Operations LLC (Detroit, MI)
Patent Classifications (CPCs):
F - MECHANICAL ENGINEERING F01 - MACHINES OR ENGINES IN GENERAL F01N - GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL
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:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY

Citation Formats

Schmieg, Steven J, Blint, Richard J, Den, Ling, Viola, Michael B, and Lee, Jong-Hwan. Method and apparatus to selectively reduce NO.sub.x in an exhaust gas feedstream. United States: N. p., 2011. Web.
Schmieg, Steven J, Blint, Richard J, Den, Ling, Viola, Michael B, & Lee, Jong-Hwan. Method and apparatus to selectively reduce NO.sub.x in an exhaust gas feedstream. United States.
Schmieg, Steven J, Blint, Richard J, Den, Ling, Viola, Michael B, and Lee, Jong-Hwan. Tue . "Method and apparatus to selectively reduce NO.sub.x in an exhaust gas feedstream". United States. https://www.osti.gov/servlets/purl/1023934.
@article{osti_1023934,
title = {Method and apparatus to selectively reduce NO.sub.x in an exhaust gas feedstream},
author = {Schmieg, Steven J and Blint, Richard J and Den, Ling and Viola, Michael B and Lee, Jong-Hwan},
abstractNote = {A method and apparatus are described to selectively reduce NO.sub.x emissions of an internal combustion engine. An exhaust aftertreatment system includes an injection device operative to dispense a hydrocarbon reductant upstream of a silver-alumina catalytic reactor device. A control system determines a NO.sub.x concentration and hydrocarbon/NOx ratio based upon selected parameters of the exhaust gas feedstream and dispenses hydrocarbon reductant during lean engine operation. Included is a method to control elements of the feedstream during lean operation. The hydrocarbon reductant may include engine fuel.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2011},
month = {8}
}

Works referenced in this record:

In-Cylinder Production of Hydrogen During Net-Lean Diesel Operation
conference, April 2006


Selective Catalytic Reduction of NOx Emissions from a 5.9 Liter Diesel Engine Using Ethanol as a Reductant
conference, October 2003


Selective Catalytic Reduction of NOx with N-Free Reductants
journal, January 1995