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Title: 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:
 [1];  [2];  [3]
  1. Media, PA
  2. Peoria, IL
  3. Havana, IL
Issue Date:
Research Org.:
Caterpillar Inc. (Peoria, IL)
Sponsoring Org.:
USDOE
OSTI Identifier:
993143
Patent Number(s):
7,743,602
Application Number:
11/514,544
Assignee:
ExxonMobil Research And Engineering Co. (Annandale, NJ) ORO
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}
}

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