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Title: Method of preparing doped oxide catalysts for lean NOx exhaust

Abstract

The lean NOx catalyst includes a substrate, an oxide support material, preferably .gamma.-alumina deposited on the substrate and a metal or metal oxide promoter or dopant introduced into the oxide support material. The metal promoters or dopants are selected from the group consisting of indium, gallium, tin, silver, germanium, gold, nickel, cobalt, copper, iron, manganese, molybdenum, chromium cerium, and vanadium, and oxides thereof, and any combinations thereof. The .gamma.-alumina preferably has a pore volume of from about 0.5 to about 2.0 cc/g; a surface area of between 80 and 350 m.sup.2 /g; an average pore size diameter of between about 3 to 30 nm; and an impurity level of less than or equal to about 0.2 weight percent. In a preferred embodiment the .gamma.-alumina is prepared by a sol-gel method, with the metal doping of the .gamma.-alumina preferably accomplished using an incipient wetness impregnation technique.

Inventors:
Issue Date:
Research Org.:
Caterpillar Inc, Peoria, IL (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1174756
Patent Number(s):
6,703,343
Application Number:
10/022,492
Assignee:
Caterpillar Inc (Peoria, IL) OSTI
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY

Citation Formats

Park, Paul W. Method of preparing doped oxide catalysts for lean NOx exhaust. United States: N. p., 2004. Web.
Park, Paul W. Method of preparing doped oxide catalysts for lean NOx exhaust. United States.
Park, Paul W. Tue . "Method of preparing doped oxide catalysts for lean NOx exhaust". United States. https://www.osti.gov/servlets/purl/1174756.
@article{osti_1174756,
title = {Method of preparing doped oxide catalysts for lean NOx exhaust},
author = {Park, Paul W.},
abstractNote = {The lean NOx catalyst includes a substrate, an oxide support material, preferably .gamma.-alumina deposited on the substrate and a metal or metal oxide promoter or dopant introduced into the oxide support material. The metal promoters or dopants are selected from the group consisting of indium, gallium, tin, silver, germanium, gold, nickel, cobalt, copper, iron, manganese, molybdenum, chromium cerium, and vanadium, and oxides thereof, and any combinations thereof. The .gamma.-alumina preferably has a pore volume of from about 0.5 to about 2.0 cc/g; a surface area of between 80 and 350 m.sup.2 /g; an average pore size diameter of between about 3 to 30 nm; and an impurity level of less than or equal to about 0.2 weight percent. In a preferred embodiment the .gamma.-alumina is prepared by a sol-gel method, with the metal doping of the .gamma.-alumina preferably accomplished using an incipient wetness impregnation technique.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2004},
month = {3}
}

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