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Title: Catalyst for reduction of nitrogen oxides

Abstract

A Selective Catalytic Reduction (SCR) catalyst was prepared by slurry coating ZSM-5 zeolite onto a cordierite monolith, then subliming an iron salt onto the zeolite, calcining the monolith, and then dipping the monolith either into an aqueous solution of manganese nitrate and cerium nitrate and then calcining, or by similar treatment with separate solutions of manganese nitrate and cerium nitrate. The supported catalyst containing iron, manganese, and cerium showed 80 percent conversion at 113 degrees Celsius of a feed gas containing nitrogen oxides having 4 parts NO to one part NO.sub.2, about one equivalent ammonia, and excess oxygen; conversion improved to 94 percent at 147 degrees Celsius. N.sub.2O was not detected (detection limit: 0.6 percent N.sub.2O).

Inventors:
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1176212
Patent Number(s):
7,691,769
Application Number:
12/080,958
Assignee:
Los Alamos National Security, LLC (Los Alamos, NM)
DOE Contract Number:  
AC52-06NA25396
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; 54 ENVIRONMENTAL SCIENCES

Citation Formats

Ott, Kevin C. Catalyst for reduction of nitrogen oxides. United States: N. p., 2010. Web.
Ott, Kevin C. Catalyst for reduction of nitrogen oxides. United States.
Ott, Kevin C. Tue . "Catalyst for reduction of nitrogen oxides". United States. https://www.osti.gov/servlets/purl/1176212.
@article{osti_1176212,
title = {Catalyst for reduction of nitrogen oxides},
author = {Ott, Kevin C.},
abstractNote = {A Selective Catalytic Reduction (SCR) catalyst was prepared by slurry coating ZSM-5 zeolite onto a cordierite monolith, then subliming an iron salt onto the zeolite, calcining the monolith, and then dipping the monolith either into an aqueous solution of manganese nitrate and cerium nitrate and then calcining, or by similar treatment with separate solutions of manganese nitrate and cerium nitrate. The supported catalyst containing iron, manganese, and cerium showed 80 percent conversion at 113 degrees Celsius of a feed gas containing nitrogen oxides having 4 parts NO to one part NO.sub.2, about one equivalent ammonia, and excess oxygen; conversion improved to 94 percent at 147 degrees Celsius. N.sub.2O was not detected (detection limit: 0.6 percent N.sub.2O).},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2010},
month = {4}
}

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Works referenced in this record:

Selective catalytic reduction of NOx using zeolitic catalysts for high temperature applications
journal, March 1992


A superior catalyst for low-temperature NO reduction with NH3
journal, March 2003

  • Qi, Gongshin; Yang, Ralph T.
  • Chemical Communications, Issue 7
  • DOI: 10.1039/b212725c

Low temperature selective catalytic reduction (SCR) of NO with NH3 over Fe–Mn based catalysts
journal, February 2002

  • Long, Richard Q.; Yang, Ralph T.; Chang, Ramsay
  • Chemical Communications, Issue 5
  • DOI: 10.1039/b111382h