Kevin F Doura

US Patent:

20230074001, Mar 9, 2023

Filed:

Aug 16, 2022

Appl. No.:

17/820012

Inventors:

- London, GB
Kevin DOURA - Audubon PA, US
Joseph FEDEYKO - Wayne PA, US

International Classification:

B01J 23/00
F24F 8/167
F24F 8/95
B01J 21/02
B01J 23/72
B01J 23/83
B01J 23/78
B01J 23/889
B01D 53/86

Abstract:

The present invention relates to a method for the treatment of an exhaust gas comprising carbon monoxide (CO) and/or one or more volatile organic compounds (VOCs) using a PGM-free catalyst article comprising a mixed oxide of Mn, Cu, Mg, Al and La. The present invention also relates to an HVAC system comprising a PGM-free catalyst article.

US Patent:

20210094022, Apr 1, 2021

Filed:

Sep 24, 2020

Appl. No.:

16/948587

Inventors:

- London, GB
- Redwitz an der Rodach, DE
Maria Theresia BRANDMAIR - Redwitz an der Rodach, DE
Kevin DOURA - Audubon PA, US
Heike KREUDER - Redwitz an der Rodach, DE
Desiree DURAN MARTIN - Reading, GB

International Classification:

B01J 23/847
B01J 23/44
B01J 21/04
B01J 23/02
B01J 23/10
B01J 23/34
B01J 23/00
B01J 35/04
B01D 53/94
B01J 29/70

Abstract:

A multi-function catalyst article for treating both NO and carbon monoxide emissions in a flow of a combustion exhaust gas from a stationary emission source comprises a honeycomb monolith substrate comprising one or more channels which are open at both ends and extend along an axial length thereof and through which, in use, a combustion exhaust gas flows, which catalyst article comprising a catalyst composition comprising a combination of a first, vanadium-containing SCR catalyst component and a second component which is a compound of a transition metal comprising copper, manganese, cobalt, molybdenum, nickel or cerium or a mixture of any two or more thereof and optionally a third, crystalline molecular sieve component.

US Patent:

20190383174, Dec 19, 2019

Filed:

Nov 29, 2017

Appl. No.:

16/465600

Inventors:

- London, GB
Kevin DOURA - Audubon PA, US
Cindy KHALAF - Alpharetta GA, US
David REPP - Alpharetta GA, US
Thomas YEH - Audubon PA, US

International Classification:

F01D 25/30
F01N 13/00
F01N 3/10
F01N 3/20

Abstract:

A method of extending the useful life of an aged selective catalytic reduction (SCR) catalyst bed, which catalyses the conversion of oxides of nitrogen (NO) to dinitrogen (N) in the presence of a nitrogenous reductant, in the exhaust gas after treatment system of a stationary source of NOso that the exhaust gas emitted to atmosphere from the system continues to meet proscribed limits for both NOand ammonia emissions, which method comprising the step of retrofitting an additional honeycomb substrate monolith or a plate-type substrate comprising a catalyst (ASC) for converting ammonia in exhaust gas also containing oxygen to nitrogen and water downstream of the aged SCR catalyst bed, wherein the kNOof the honeycomb substrate monolith comprising the catalyst for converting ammonia in exhaust gas also containing oxygen to nitrogen and water is greater than or equal to 80 m/hr between 300 and 400 C. inclusive, wherein kNOx of a sample of the catalyst, which has been aged at 450 C. in 10% HO (as steam) in air for 48 hours, is determined by a SCR activity test in a laboratory scale reactor using a gas composition of 50 ppm CO, 30 ppm NO, 36 ppm NH, 15% O, 8% water, 3% CO, balance N.

US Patent:

20180078898, Mar 22, 2018

Filed:

Sep 22, 2017

Appl. No.:

15/712187

Inventors:

- London, GB
Hai-Ying CHEN - Wayne PA, US
Kevin DOURA - Audubon PA, US
Joseph FEDEYKO - Wayne PA, US

International Classification:

B01D 53/86
B01D 53/94
B01J 21/06
B01J 21/04
F01N 3/10

Abstract:

An oxidation catalyst is described for treating hydrocarbons in an exhaust gas produced by an internal combustion engine, wherein the oxidation catalyst comprises a region disposed on a substrate, wherein the region comprises ruthenium (Ru) supported on a support material comprising a refractory oxide.

US Patent:

20180078900, Mar 22, 2018

Filed:

Sep 22, 2017

Appl. No.:

15/712178

Inventors:

- London, GB
Hai-Ying CHEN - Wayne PA, US
Kevin DOURA - Audubon PA, US
Joseph FEDEYKO - Wayne PA, US
John KILMARTIN - Reading, GB

International Classification:

B01D 53/94
B01J 21/04
B01J 21/08
B01J 35/00
B01J 35/04
F01N 3/10

Abstract:

An oxidation catalyst is described for treating an exhaust gas produced by a diesel engine. The oxidation catalyst comprises a washcoat region disposed on a substrate, wherein the washcoat region comprises a mixture of: platinum (Pt) supported on a first support material; and ruthenium (Ru).

US Patent:

20180078926, Mar 22, 2018

Filed:

Sep 22, 2017

Appl. No.:

15/712271

Inventors:

- London, GB
Kevin DOURA - Audubon PA, US
Janet FISHER - Reading, GB
John KILMARTIN - Reading, GB

International Classification:

B01J 23/89
B01J 23/46
B01J 21/06
B01J 21/12
B01J 23/42
B01D 53/94

Abstract:

An ammonia slip catalyst (ASC) comprising a first SCR catalyst, an oxidation catalyst comprising ruthenium or a Ru mixture, such as a Pt and Ru mixture, on a support comprising a rutile phase and a substrate is described. In some configurations, the ASC comprises a second oxidation catalyst. In other configurations, the ASC comprises a second oxidation catalyst and a third oxidation catalyst. The ASC's are useful for selective catalytic reduction (SCR) of NOx in exhaust gases and in reducing the amount of ammonia slip. Methods for producing such articles are described. Methods of using the ammonia slip catalyst in an SCR process, where the amount of ammonia slip is reduced, are also described.

US Patent:

20170341022, Nov 30, 2017

Filed:

May 30, 2017

Appl. No.:

15/607936

Inventors:

- London, GB
Kevin DOURA - Audubon PA, US

International Classification:

B01D 53/86
F01N 3/10
B01D 53/56
F01N 3/08
B01D 53/75

Abstract:

A method of selectively catalysing the reduction of oxides of nitrogen (NO) including nitrogen monoxide in an exhaust gas of a stationary source of NOemissions also containing oxides of sulfur (SO) comprising the steps of passively oxidising nitrogen monoxide to nitrogen dioxide (NO) over an oxidation catalyst comprising a platinum group metal so that a NO/NOcontent is from 40-60%; introducing a nitrogenous reductant into the exhaust gas; and contacting exhaust gas having the 40-60% NO/NOcontent and containing the nitrogenous reductant with a selective catalytic reduction (SCR) catalyst comprising an aluminosilicate zeolite promoted with copper.

US Patent:

20170189854, Jul 6, 2017

Filed:

Feb 2, 2017

Appl. No.:

15/422787

Inventors:

- London, GB
Hai-Ying Chen - Wayne PA, US
Julian Peter Cox - Wayne PA, US
Kevin Doura - Wayne PA, US
Joseph Michael Fedeyko - Wayne PA, US
Erich Conlan Weigert - Wayne PA, US

International Classification:

B01D 53/94
B01J 35/00
B01D 46/24
B01J 23/44
B01J 23/648
B01J 35/04
B01J 29/85

Abstract:

Provided is an ammonia slip catalyst article having supported palladium in a top or upstream layer for oxidation of carbon monoxide and/or hydrocarbons, an SCR catalyst either in the top layer or in a separate lower or downstream layer, and an ammonia oxidation catalyst in a bottom layer. Also provided are methods for treating an exhaust gas using the catalyst article, wherein the treatment involves reducing the concentrations of ammonia and optionally carbon monoxide and/or hydrocarbons in the exhaust gas.