Basf Corporation

Air Products and Chemicals, Inc.

Engelhard Corporation

Basf Mobile Emissions Catalysts LLC

Basf Se Corporation

University of Central Florida Research Foundation Inc

Gm Global Technolgoy Operations, Inc.

Basf Catalysts LLC

Englhard Corporation

Yuejin Li

Stanley Allen Roth

Torsten Neubauer

Alfred Helmut Punke

Gerd Grubert

John N Armor

Michel Deeba

Marcus Hilgendorff

Olga Gerlach

Andreas Sundermann

Xiaolai Zheng

Joseph Charles Dettling

Shiang Sung

Torsten W Müller-Stach

Jeffrey Barmont Hoke

Joseph Allan Patchett

Wen-Mei Xue

Chung-Zong Wan

Xinyi Wei

Matthew Tyler Caudle

Attilio Siani

Fudong Liu

Thomas Albert Braymer

Wei Ping Li

Kenneth Edwin Voss

Susanne Stiebels

John K Hochmuth

Knut Wassermann

Xiaofan Yang

Gary A Gramiccioni

Rostam Jai Madon

Thomas Stephen Farris

Marius Vaarkamp

Jeff H Yang

Kevin A Hallstrom

James G Hansel

Junmei Wei

Shaohua Xie

Ruediger Wolff

Yuntao Gu

M Shahjahan Kazi

Jack L Stolz

David M Youngren

Torsten Wolfgang Mueller-Stach

Michael Locascio

Matthew J Schladt

Peter Charles Hohl

Ivan Petrovic

Chandrasbekhar Pandurang Kelkar

Cunchala S Swamy

Srivivasan Kannan

S Venkat Raman

Stanley D Roth

Shlang Sung

John Nelson Armor

Stanley Allan Roth

Atilio Siani

W Torsten MÜLLER-Stach

Alfred H Punke

Shahjahan M Kazi

Wolfgang Torsten Mueller-Stach

Helmut Alfred Punke

A Stanley Roth

Barmont Jeffrey Hoke

Alfred Punke

Torsten Müller-Stach

The present disclosure generally provides selective catalytic reduction (SCR) catalyst compositions, catalyst articles and catalyst systems including such catalyst articles for treating engine exhaust gas. In particular, the SCR catalyst composition includes a first zeolite and a second zeolite and has not been subjected to temperatures above 650° C. The first zeolite includes a promoter metal and has a first framework structure and at least a portion of the second zeolite is in a form selected from Hform, NHform, alkali metal form, alkaline earth metal form, and combinations thereof and has a second framework structure. The first framework structure and the second framework structure are different.

Mixed zeolite-containing SCR catalyst

The present disclosure provides SCR catalyst compositions capable of reducing nitrogen oxide (NO) emissions in engine exhaust. The catalyst compositions include a reducible metal oxide support containing ceria, one or more transition metal oxides as a redox promotor; and an oxide of niobium, tungsten, silicon, molybdenum, or a combination thereof as an acidic promotor. The redox promotor and the acid promotor are both supported on the reducible metal oxide support. Further provided are SCR catalyst articles coated with such compositions, processes for preparing such catalyst compositions and articles, an exhaust gas treatment system including such catalyst articles, and methods for reducing NOin an exhaust gas stream using such catalyst articles and systems.

Metal oxide-based SCR catalyst composition

The present disclosure provides catalyst compositions for NOx conversion and catalytic articles incorporating such catalyst compositions. Certain catalyst compositions include a zeolite with a silica-to-alumina ratio from 5 to 20 and sufficient Cu exchanged into cation sites of the zeolite such that the zeolite has a Cu/Al ratio of 0.1 to 0.5 and a CuO loading of 1 to 15 wt. %; and a copper trapping component in a concentration in the range of 1 to 20 wt. %, the copper trapping component including a plurality of particles having a particle size of about 0.5 to 20 microns. Certain catalyst compositions include, as the copper trapping component, alumina present as a plurality of alumina particles with a Dparticle size distribution in the range of 0.5 microns to 20 microns.

Catalytic washcoat with added alumina for NOx abatement

The present disclosure provides catalyst compositions for NOconversion and wall-flow filter substrates comprising such catalyst compositions. Certain catalyst compositions include a zeolite with sufficient Cu exchanged into cation sites thereof to give a Cu/Al ratio of 0.1 to 0.5 and a CuO loading of 1 to 15 wt. %; and a copper trapping component (e.g., alumina) including a plurality of particles having a Dparticle size of about 0.5 to 20 microns in a concentration of about 1 to 20 wt. %. The zeolite and copper trapping component can be in the same washcoat layer or can be in different washcoat layers (such that the copper trapping component serves as a 'pre-coating' on the wall-flow filter substrate).

Catalytic composition with added copper trapping component for NOx abatement

Disclosed herein are emission treatment systems, articles, and methods for selectively reducing NOx compounds. The systems include a hydrogen generator, a hydrogen selective catalytic reduction (H-SCR) article, and one or more of a diesel oxidation catalyst (DOC) and/or a lean NOx trap (LNT) and/or a low temperature NOx adsorber (LTNA). Certain articles may comprise a zone coated substrate and/or a layered coated substrate and/or an intermingled coated substrate of one or more of the H-SCR and/or DOC and/or LNT and/or LTNA catalytic compositions.

Low temperature NOx reduction using H2-SCR for diesel vehicles

A selective catalytic reduction (SCR) catalyst composition effective in the abatement of nitrogen oxides (NO) is provided. The SCR catalyst composition significantly increases the conversion of NOrelative to a Cu-chabazite reference catalyst composition at any temperature, and especially at low temperatures. A catalyst article, an exhaust gas treatment system, and a method of treating an exhaust gas stream, each including the SCR catalyst composition of the invention, are also provided. The SCR catalyst composition is particularly useful for treatment of exhaust from a lean-burn engine.

Advanced NOreduction catalysts

A three-way catalyst for reduced palladium loading is provided. The catalyst includes an inert substrate and a palladium catalyst material coating the substrate. The palladium catalyst material includes a support material formed from one of 10% CeO/AlO, 20% CeO&#x2014;AlO(20CeAlOy), 30% CeO&#x2014;AlO(30CeAlOy), AlO, and MOx-AlO, wherein M is one of copper, iron, manganese, titanium, zirconium, magnesium, strontium, and barium. The palladium catalyst material includes a layer of CeOmaterial disposed upon the support material, wherein the layer of CeOmaterial is dispersed on a surface of the support material. The palladium catalyst material includes an active component including a layer of praseodymium oxide particles dispersed across the surface of the layer of CeOmaterial and a layer of palladium particles disposed upon and dispersed across the surface of the layer of CeOmaterial at locations each corresponding to a respective location of each of the praseodymium particles.

Three-way catalyst with reduced palladium loading and method of making the three-way catalyst

Low temperature NOx reduction using H-SCR for diesel vehicles

A nitrous oxide (NO) removal catalyst composite is provided, comprising a NO removal catalytic material on a substrate, the catalytic material comprising a rhodium (Rh) component supported on a ceria-based support, wherein the catalyst composite has a H-consumption peak of about 100&#xb0; C. or less as measured by hydrogen temperature-programmed reduction (H-TPR). Methods of making and using the same are also provided.

Nitrous oxide removal catalysts for exhaust systems

The present disclosure is directed to a system for treating an exhaust gas stream from an engine, which includes a diesel oxidation catalyst (DOC) located downstream of the engine and adapted for oxidation of hydrocarbons and carbon monoxide, an injector adapted for the addition of a reductant to the exhaust gas stream located downstream of the DOC, a catalyzed soot filter (CSF) located downstream of the injector, and a selective catalytic reduction component adapted for the oxidation of nitrogen oxides located downstream of the CSF. The CSF is adapted for oxidizing hydrocarbons and includes a selective oxidation catalyst composition on a filter with high selectivity ratio for hydrocarbon oxidation:ammonia oxidation (e.g., at least 0.6).

Catalyzed soot filter with reduced ammonia oxidation

Provided are multi-zone catalyst articles, methods of manufacturing multi-zone catalyst articles, and methods for controlling emissions in diesel engine exhaust streams with multi-zone catalyst articles, where the emission treatment system of various embodiments effectively treats diesel engine exhaust with a single multi-zone catalyst article.

Multifunctional filters for diesel emission control

An on-board vehicle reservoir containing an ammonia/organic solvent solution may be associated with a phase separator configured to isolate ammonia from the solution. The ammonia may be introduced into an exhaust gas stream of an internal combustion engine to function as a catalytic reductant. Ammonia may be employed to generate hydrogen via catalytic decomposition of ammonia, and the hydrogen may be introduced into an exhaust gas stream to aid catalytic reactions such as catalytic oxidation of carbon monoxide (CO) and/or hydrocarbon (HC) and/or reduction of nitrogen oxides (NO); for instance during a cold-start period.

On-board vehicle ammonia and hydrogen generation

A nitrous oxide (NO) removal catalyst composition for treating an exhaust stream of an internal combustion engine is provided, containing a platinum group metal (PGM) component on a metal oxide-based support, wherein the NO removal catalyst composition is in a substantially reduced form, such that it has an oxygen deficiency of about 0.05 mmol oxygen atoms/g or greater, and wherein the NO removal catalyst composition provides effective removal of at least a portion of NO from the exhaust stream under lean conditions at a temperature of about 350&#xb0; C. or lower. NO removal catalytic articles, systems, and methods are also provided for removing at least a portion of NO from an exhaust stream under lean, low temperature conditions.

NO removal from automotive exhaust for lean/rich systems

Provided are catalyst articles, methods of manufacturing catalyst articles, and methods for controlling emissions in diesel engine exhaust streams with catalyst articles, where the emission treatment system of various embodiments effectively treats diesel engine exhaust with a catalyst article. In one or more embodiments, the catalyst articles have a platinum group metal end coating covering an outlet end surface of the catalytic article. In one or more embodiments, a method is provided where an applicator transfers a platinum group metal coating to an outlet end face of a catalytic article.

Catalyzed filters with end coating for lean engine exhaust

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Edison, NJ, United States of America

Yuejin Li