On-board ammonia generation and exhaust after treatment system using same
Abstract
Often NOx selective catalysts that use ammonia to reduce NOx within exhaust to a harmless gas require on-board storage of ammonia which can be hazardous and inconvenient. In order to generate ammonia in exhaust, the present disclosure increases a NOx concentration in exhaust from at least one combustion chamber, at least in part, by injecting fuel in a predetermined increased NOx generation sequence that includes a first injection during non-auto ignition conditions and a second injection during auto ignition conditions. At least a portion of the NOx is converted to ammonia by passing at least a portion of the exhaust with the increased NOx concentration over an ammonia-producing catalyst.
- Inventors:
-
- Dunlap, IL
- Peoria, IL
- Pekin, IL
- (Colona, IL)
- Issue Date:
- Research Org.:
- Caterpillar Inc., Deerfield, IL (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1014458
- Patent Number(s):
- 7685809
- Application Number:
- U S Patent Application 11/242,172
- Assignee:
- Caterpillar Inc. (Peoria, IL)
- Patent Classifications (CPCs):
-
B - PERFORMING OPERATIONS B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL B01D - SEPARATION
C - CHEMISTRY C01 - INORGANIC CHEMISTRY C01C - AMMONIA
- DOE Contract Number:
- FC05-97OR22605
- Resource Type:
- Patent
- Country of Publication:
- United States
- Language:
- English
Citation Formats
Driscoll, Josh, Robel, Wade J, Brown, Cory A, and Urven, Jr., Roger L. On-board ammonia generation and exhaust after treatment system using same. United States: N. p., 2010.
Web.
Driscoll, Josh, Robel, Wade J, Brown, Cory A, & Urven, Jr., Roger L. On-board ammonia generation and exhaust after treatment system using same. United States.
Driscoll, Josh, Robel, Wade J, Brown, Cory A, and Urven, Jr., Roger L. Tue .
"On-board ammonia generation and exhaust after treatment system using same". United States. https://www.osti.gov/servlets/purl/1014458.
@article{osti_1014458,
title = {On-board ammonia generation and exhaust after treatment system using same},
author = {Driscoll, Josh and Robel, Wade J and Brown, Cory A and Urven, Jr., Roger L.},
abstractNote = {Often NOx selective catalysts that use ammonia to reduce NOx within exhaust to a harmless gas require on-board storage of ammonia which can be hazardous and inconvenient. In order to generate ammonia in exhaust, the present disclosure increases a NOx concentration in exhaust from at least one combustion chamber, at least in part, by injecting fuel in a predetermined increased NOx generation sequence that includes a first injection during non-auto ignition conditions and a second injection during auto ignition conditions. At least a portion of the NOx is converted to ammonia by passing at least a portion of the exhaust with the increased NOx concentration over an ammonia-producing catalyst.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2010},
month = {3}
}
Works referenced in this record:
In-Situ NH3 Generation for SCR NOx Applications
conference, October 2002
- Ogunwumi, S.; Fox, R.; Patil, M. D.
- SAE Powertrain & Fluid Systems Conference & Exhibition