Reformer assisted lean NO.sub.x catalyst aftertreatment system and method
Abstract
A method and apparatus for catalytically processing a gas stream passing therethrough to reduce the presence of NO.sub.x therein, wherein the apparatus includes a first catalyst composed of a silver-containing alumina that is adapted for catalytically processing the gas stream at a first temperature range, a second catalyst composed of a copper-containing zeolite located downstream from the first catalyst, wherein the second catalyst is adapted for catalytically processing the gas stream at a lower second temperature range relative to the first temperature range, a hydrocarbon compound for injection into the gas stream upstream of the first catalyst to provide a reductant, and a reformer for reforming a portion of the hydrocarbon compound into H.sub.2 and/or oxygenated hydrocarbon for injection into the gas stream upstream of the first catalyst. The second catalyst is adapted to facilitate the reaction of reducing NOx into N.sub.2, whereby the intermediates are produced via the first catalyst reacting with NOx and hydrocarbons.
- Inventors:
-
- Media, PA
- Peoria, IL
- Havana, IL
- Issue Date:
- Research Org.:
- Caterpillar Inc., Deerfield, IL (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 993143
- Patent Number(s):
- 7743602
- Application Number:
- 11/514,544
- Assignee:
- ExxonMobil Research And Engineering Co. (Annandale, NJ)
- Patent Classifications (CPCs):
-
B - PERFORMING OPERATIONS B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL B01D - SEPARATION
F - MECHANICAL ENGINEERING F01 - MACHINES OR ENGINES IN GENERAL F01N - GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL
- DOE Contract Number:
- AC05-00OR22725
- Resource Type:
- Patent
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
Citation Formats
Kalyanaraman, Mohan, Park, Paul W, and Ragle, Christie S. Reformer assisted lean NO.sub.x catalyst aftertreatment system and method. United States: N. p., 2010.
Web.
Kalyanaraman, Mohan, Park, Paul W, & Ragle, Christie S. Reformer assisted lean NO.sub.x catalyst aftertreatment system and method. United States.
Kalyanaraman, Mohan, Park, Paul W, and Ragle, Christie S. Tue .
"Reformer assisted lean NO.sub.x catalyst aftertreatment system and method". United States. https://www.osti.gov/servlets/purl/993143.
@article{osti_993143,
title = {Reformer assisted lean NO.sub.x catalyst aftertreatment system and method},
author = {Kalyanaraman, Mohan and Park, Paul W and Ragle, Christie S},
abstractNote = {A method and apparatus for catalytically processing a gas stream passing therethrough to reduce the presence of NO.sub.x therein, wherein the apparatus includes a first catalyst composed of a silver-containing alumina that is adapted for catalytically processing the gas stream at a first temperature range, a second catalyst composed of a copper-containing zeolite located downstream from the first catalyst, wherein the second catalyst is adapted for catalytically processing the gas stream at a lower second temperature range relative to the first temperature range, a hydrocarbon compound for injection into the gas stream upstream of the first catalyst to provide a reductant, and a reformer for reforming a portion of the hydrocarbon compound into H.sub.2 and/or oxygenated hydrocarbon for injection into the gas stream upstream of the first catalyst. The second catalyst is adapted to facilitate the reaction of reducing NOx into N.sub.2, whereby the intermediates are produced via the first catalyst reacting with NOx and hydrocarbons.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2010},
month = {6}
}
Works referenced in this record:
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