Title: Method for treating engine exhaust by use of hydrothermally stable, low-temperature NO.sub.x reduction NH3-SCR catalysts

Abstract

A catalyst composition includes a heterobimetallic zeolite characterized by a chabazite structure loaded with copper ions and at least one trivalent metal ion other than Al.sup.3+. The catalyst composition decreases NO.sub.x emissions in diesel exhaust and is suitable for operation in a catalytic converter.

Inventors:

Narula, Chaitanya K.; Yang, Xiaofan

Issue Date:

2017-07-04

Research Org.:

Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

Sponsoring Org.:

USDOE

OSTI Identifier:

1368350

Patent Number(s):

9694352

Application Number:

15/278,785

Assignee:

UT-BATTELLE, LLC

Patent Classifications (CPCs):

B - PERFORMING OPERATIONS B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL B01D - SEPARATION

B - PERFORMING OPERATIONS B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL B01J - CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY

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B - PERFORMING OPERATIONS B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL B01D - SEPARATION

B01D2255/20738 - Iron
B01D2255/20761 - Copper
B01D2255/50 - Zeolites
B01D2258/012 - Diesel engines and lean burn gasoline engines
B01D53/8628 - {Processes characterised by a specific catalyst}
B01D53/8631 - {Processes characterised by a specific device}
B01D53/9418 - {for removing nitrogen oxides by selective catalytic reduction [SCR] using a reducing agent in a lean exhaust gas}

B - PERFORMING OPERATIONS B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL B01J - CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY

B01J2229/183 - in framework positions
B01J2229/186 - not in framework positions
B01J29/061 - {containing metallic elements added to the zeolite}
B01J29/064 - containing iron group metals, noble metals or copper
B01J29/068 - Noble metals
B01J29/072 - Iron group metals or copper
B01J29/7049 - {containing rare earth elements, titanium, zirconium, hafnium, zinc, cadmium, mercury, gallium, indium, thallium, tin or lead}
B01J29/7065 - {CHA-type, e.g. Chabazite, LZ-218}
B01J29/76 - Iron group metals or copper
B01J29/763 - {CHA-type, e.g. Chabazite, LZ-218}
B01J29/783 - {CHA-type, e.g. Chabazite, LZ-218}
B01J35/04 - Foraminous structures, sieves, grids, honeycombs

C - CHEMISTRY C01 - INORGANIC CHEMISTRY C01B - NON-METALLIC ELEMENTS

C01B39/02 - Crystalline aluminosilicate zeolites
C01B39/026 - {After-treatment}
C01B39/06 - Preparation of isomorphous zeolites characterised by measures to replace the aluminium or silicon atoms in the lattice framework by atoms of other elements {, i.e. by direct or secondary synthesis}
C01B39/065 - {Galloaluminosilicates
C01B39/46 - Other types characterised by their X-ray diffraction pattern and their defined composition {

Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE Y02T - CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION

Y02T10/12 - Technologies for the improvement of indicated efficiency of a conventional ICE

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DOE Contract Number:  

AC05-00OR22725

Resource Type:

Patent

Resource Relation:

Patent File Date: 2016 Sep 28

Country of Publication:

United States

Language:

English

Subject:

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY