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Title: Method and apparatus for combination catalyst for reduction of NO.sub.x in combustion products

Patent ·
OSTI ID:1014568
 [1];  [2];  [3];  [4];  [5]
  1. Newtown, PA
  2. Schwenksville, PA
  3. Princeton, NJ
  4. Media, PA
  5. Peoria, IL
+ Show Author Affiliations

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, and 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.

Research Organization:
ExonMobil Research and Engineering Company (Annandale, NJ); Caterpillar Inc. (Peoria, IL
Sponsoring Organization:
USDOE
DOE Contract Number:
AC05-00OR22725
Assignee:
ExonMobil Research and Engineering Company (Annandale, NJ); Caterpillar Inc. (Peoria, IL)
Patent Number(s):
7,803,338
Application Number:
US Patent Application 11/157,729
OSTI ID:
1014568
Country of Publication:
United States
Language:
English

References (5)

Continuous reduction of NO with octane over a silver/alumina catalyst in oxygen-rich exhaust gases: combined heterogeneous and surface-mediated homogeneous reactions journal October 2003
Combination of low and high temperature catalytic materials to obtain broad temperature coverage for plasma-facilitated NOx reduction journal February 2004
Promotion effect of H2 on the low temperature activity of the selective reduction of NO by light hydrocarbons over Ag/Al2O3 journal May 2003
The effect of hydrogen on the selective catalytic reduction of NO in excess oxygen over Ag/Al2O3 journal August 2004
Kinetic considerations of H2 assisted hydrocarbon selective catalytic reduction of NO over Ag/Al2O3 journal April 2006

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