Engelhard Corporation

Basf Corporation

Basf Catalysts LLC

Basf Mobile Emissions Catalysts LLC

Engelhard Minerals & Chemicals Corporation

Englehard Corporation

Basf Se Corporation

Kenneth Edwin Voss

Robert J Farrauto

Kevin A Hallstrom

Bulent O Yavuz

Stanley Allen Roth

Gary Wayne Rice

Jaya L Mohanan

Sanath V Kumar

Matthew P Larkin

Michael G Norris

Marius Vaarkamp

Timothy D Wildman

Sandip D Shah

Michel Deeba

Martin Dieterle

Susanne Stiebels

Michael P Galligan

R Samuel Boorse

John K Hochmuth

Jeff H Yang

Jeffrey Barmont Hoke

Ronald Marshall Heck

Wen-Mei Xue

Torsten Neubauer

Edward N Balko

Anthony J Rotolico

Alfred Helmut Punke

Gary A Gramiccioni

Edgar Viktor Huennekes

Robert Dorner

Yiu Kwan Lui

Arthur J Fabel

M Shahjahan Kazi

Ramesh M Kakwani

Leonard M Quick

David M Youngren

John R Adomaitis

Robert E Whiteley

Gerald L Kutner

Joseph Charles Dettling

Joseph Allan Patchett

Shiang Sung

Yuejin Li

Patrick L Burk

John Joseph Steger

Matthew Tyler Caudle

Gerd Grubert

Attilio Siani

Barbara K Slawski

Qi Fu

Torsten W Müller-Stach

Jan Martin Becker

Subramanian Prasad

Martin Kalwei

Kevin Beard

Weiyong Tang

Kevin David Beard

Petra Cordes

Joseph A Patchett

Andreas Richard Munding

Ruediger Wolff

Ansgar Wille

Torsten Wolfgang Mueller

Nicholas Mcguire

Fabien A Rioult

Alexander Gorel

Jaya L Lakshmi

Andrew Thoms

Ingemar Gottberg

Steve Truesdail

Torsten Müller-Stach

Sandip Shah

Samuel R Boorse

The present invention relates to a catalyst for the selective catalytic reduction of nitrogen oxide, the catalyst comprising a first coating comprising a 12-membered ring pore zeolitic material comprising a first metal which is one or more of copper and iron, and a second coating comprising an 8-membered ring pore zeolitic material comprising a second metal which is one or more of copper and iron.

High ammonia storage capacity SCR catalysts

Provided are catalyst articles, methods and systems for treating lean burn engine exhaust. Catalyst articles include selective catalytic reduction catalyst on a particulate filter. The SCR catalyst on the particulate filter provides limited NOx conversion so that unconverted NOis available to facilitate passive oxidation of soot trapped on the particulate filter by reaction with NO. Systems and methods utilize such catalytic articles, and further include, e.g., a downstream selective catalytic reduction catalyst on a flow through substrate.

Filter catalyzed with SCR catalyst, systems and methods

Zoned diesel oxidation catalysts containing a higher precious metal loading in the inlet zone that the outlet zone and an equal or shorter length inlet zone are described. Emission treatment systems and methods of remediating nitrogen oxides (NOx), particulate matter, and gaseous hydrocarbons using zoned diesel oxidation catalysts are also described.

Emission treatment catalysts, systems and methods

Certain selective catalytic reduction (SCR) articles, systems and methods provide for high NOx conversion while at the same time low NO formation. The articles, systems and methods are suitable for instance for the treatment of exhaust gas of diesel engines. Certain articles have zoned coatings containing copper-containing molecular sieves disposed thereon, where for example a concentration of catalytic copper in an upstream zone is lower than the concentration of catalytic copper in a downstream zone.

Selective catalytic reduction articles and systems

Certain selective catalytic reduction (SCR) articles, systems and methods provide for high NOx conversion while at the same time low NO formation. The articles, systems and methods are suitable for instance for the treatment of exhaust gas of diesel engines. Certain articles have zoned coatings disposed thereon, for example, a zoned coating comprising an upstream zone comprising a coating layer comprising a steam-activated iron-containing molecular sieve and a downstream zone comprising a coating layer comprising a high copper-containing molecular sieve.

A system for treatment of an exhaust gas stream from an engine is provided, containing an upstream selective catalytic reduction (SCR) catalyst, which receives the exhaust gas stream without any intervening catalyst, a diesel oxidation catalyst (DOC) positioned downstream thereof; a catalyzed soot filter (CSF) downstream of the diesel oxidation catalyst; a second SCR catalyst positioned downstream of the catalyzed soot filter; and an ammonia oxidation (AMOx) catalyst. The application also describes use of such systems to reduce nitrogen oxides (NOx) and hydrocarbons (HC) in an exhaust gas stream.

Exhaust gas treatment system with upstream SCR catalyst

The present invention relates to a catalytic article comprising a substrate having a catalyst composition disposed thereon, wherein the catalyst composition comprises a platinum group metal impregnated onto a porous support and a selective catalytic reduction catalyst, wherein the catalyst composition is substantially free of platinum; and wherein the catalytic article is effective in the abatement of nitrogen oxides (NOx) and hydrocarbons (HCs). The present invention further relates to exhaust gas treatment systems for treating an exhaust gas stream exiting a diesel engine.

Catalytic article and exhaust gas treatment systems

Described are exhaust gas treatment systems for treatment of an engine exhaust gas stream containing NOx. The exhaust gas treatment system comprises an engine, a catalyst system including a selective catalytic reduction article comprising two zones, an upstream zone comprising iron-promoted first molecular sieves and a downstream zone comprising copper-promoted second molecular sieves. The catalyst system is effective to reduce high NOx levels in the exhaust gas stream. Also described are methods for treatment of engine exhaust gas streams, comprising treating engine exhaust gas streams containing high NOx levels with catalyst systems including selective catalytic reduction articles having two zones.

Exhaust gas treatment system

Described are compositions and catalytic articles comprising both a first molecular sieve promoted with copper and a second molecular sieve promoted with iron, the first and second molecular sieves having a d6r unit and the first molecular sieves having cubic shaped crystals with an average crystal size of about 0.5 to about 2 microns. The weight ratio of the copper-promoted molecular sieve to the iron-promoted molecular sieve can be about 1:1 to about 4:1. The catalytic articles are useful in methods and systems to catalyze the reduction of nitrogen oxides in the presence of a reductant.

Mixed metal large crystal molecular sieve catalyst compositions, catalytic articles, systems and methods

Described is a catalyst composition suitable for use as a selective catalytic reduction catalyst, including small-pore molecular sieve particles having a pore structure and a maximum ring size of eight tetrahedral atoms and impregnated with a promoter metal, and metal oxide particles dispersed within the small-pore molecular sieve particles and external to the pore structure of the small-pore molecular sieve particles, wherein the metal oxide particles include one or more oxides of a transition metal or lanthanide of Group 3 or Group 4 of the Periodic Table. A method for preparing the catalyst, a method for selectively reducing nitrogen oxides, and an exhaust gas treatment system are also described.

Exhaust gas treatment catalyst

Provided herein are zoned catalysts that utilize components efficiently in that relatively short zones are provided to achieve specific functionalities to convert and/or trap one or more components in the exhaust stream. Highly controlled zoned are formed from one end of a monolithic carrier. The zones have a flat profile such that the zoned catalytic material within each passage of the substrate is at a substantially uniform distance from one end of the carrier. Methods of making and using the same are also provided.

Zoned catalyst composites

Catalytic articles, methods and emissions treatment systems for treating an engine exhaust gas stream containing NOand particulate matter are disclosed and include a particulate filter comprising a first SCR catalyst for NOconversion disposed downstream of the injector. The particulate filter is a partial filter with a particle filtration efficiency between about 30% and 60% and an SCR catalyst loading in the range of 0.1 g/in-3.5 g/in.

Partial filter substrates containing SCR catalysts and methods and emissions treatment systems

An oxidation catalyst composite, methods, and systems for the treatment of exhaust gas emissions from a diesel engine are described. More particularly, an oxidation catalyst composite including a zoned diesel oxidation catalyst with a first washcoat zone with a Pt/Pd ratio that is less than 3:1 and a PGM loading at least twice that of a second washcoat zone.

Zoned catalyst for diesel applications

Growing community of inventors

Somerville, NJ, United States of America

Kenneth Edwin Voss