Basf Corporation

Basf Catalysts LLC

Other

Basf Se Corporation

Engelhard Corporation

Basf Mobile Emissions Catalysts LLC

Xinyi Wei

Stanley Allen Roth

Michel Deeba

Torsten Neubauer

Xiaoming Xu

Jeffrey Barmont Hoke

Patrick L Burk

Xinsheng Liu

Marcus Hilgendorff

Olga Gerlach

Gerd Grubert

Alfred Helmut Punke

Torsten W Müller-Stach

Shiang Sung

Yuejin Li

Wen-Mei Xue

Harold N Rabinowitz

Andreas Sundermann

Knut Wassermann

Attilio Siani

Jia Cheng Liu

Haiyang Zhu

Emily Schulman

Evan Vincent Miu

Glenn Svoboda

Pascaline Tran

Joseph Allan Patchett

Stefan Maurer

Chung-Zong Wan

Shau-Lin Franklin Chen

Stephan Siemund

Stefan Kotrel

Gerard D Lapadula

John K Hochmuth

M Shahjahan Kazi

Torsten Wolfgang Mueller-Stach

Limiao An

Shlang Sung

Stephan Slemund

Torsten Müller-Stach

Stanley Roth

Alfred Punke

Torsten Muller-Stach

Stanley A Roth

Patrick Burk

Barmont Jeffrey Hoke

A Stanley Roth

Helmut Alfred Punke

Wolfgang Torsten Mueller-Stach

Shahjahan M Kazi

Alfred H Punke

W Torsten MÜLLER-Stach

Atilio Siani

The present disclosure is directed to Low Temperature NOx-Absorber (LT-NA) catalyst compositions, catalyst articles, and an emission treatment system for treating an exhaust gas, each including the LT-NA catalyst compositions. Further provided are methods for reducing a NOlevel in an exhaust gas stream using the catalyst article. In particular, the LT-NA compositions include a zeolite containing a first metal component including palladium and a second metal component which is an alkaline earth metal component, an oxide of an alkaline earth metal component, a rare earth metal component, an oxide of a rare earth metal component, or a combination thereof. The LT-NA compositions exhibit increased low temperature NOadsorption capacity and enhanced hydrothermal stability.

Low temperature NOx adsorber with enhanced hydrothermal stability

The present disclosure provides Low Temperature NO-Absorber (LT-NA) catalyst compositions, catalyst articles, and an emission treatment system for treating an exhaust gas, each including the LT-NA catalyst compositions. Further provided are methods for reducing a NOlevel in an exhaust gas stream using the LT-NA catalyst articles. In particular, the LT-NA catalyst compositions include a first zeolite, a first palladium component, and a plurality of platinum nanoparticles. The LT-NA catalyst compositions exhibit enhanced regeneration efficiency with respect to NOadsorption capacity, even after hydrothermal aging.

Low temperature NOadsorber with enhanced regeneration efficiency

The present invention provides an oxidation catalyst composition suitable for at least partial conversion of gaseous hydrocarbon emissions, e.g., methane. The oxidation catalyst composition includes at least one platinum group metal (PGM) component supported onto a porous zirconia-containing material that provides an effect on hydrocarbon conversion activity. The porous zirconia-containing material is at least 90% by weight in the monoclinic phase. Furthermore, the PGM component can comprise at least one platinum group metal in the form of colloidally deposited nanoparticles. The oxidation catalyst composition can be used in the treatment of emissions from lean compressed natural gas engines.

Oxidation catalyst for lean compressed natural gas engine

Emissions treatment systems of combustion engines are provided, which comprise a platinum-containing catalyst that is degreened during production, which is before exposure to operating conditions of a vehicle having a diesel engine. The platinum-containing catalyst, in the form of a platinum component on a high surface area refractory metal oxide support, exhibits a vibration frequency of about 2085 to about 2105 cmas measured by CO-DRIFTS. Such catalytic material is essentially-free of platinum oxide species found at greater than about 2110 cmas measured by CO-DRIFTS. Such catalysts can provide excellent and consistent conversion of nitrogen oxide (NO) to nitrogen dioxide (NO).

Platinum-containing catalysts for combustion engines

The present disclosure is directed to a Low Temperature NOx-Absorber (LT-NA) catalyst composition which exhibits NOx adsorption in a broad temperature and space velocity range, and shifts NOx desorption to a desired temperature range. In particular, the LT-NA composition includes a large pore zeolite containing a palladium component and a small or medium pore zeolite containing a palladium component. Further provided is a catalyst article including the LT-NA catalyst composition, an emission treatment system for treating an exhaust gas including the catalyst article, and methods for reducing a NOx level in an exhaust gas stream using the catalyst article.

Diesel oxidation catalysts for ultralow NOcontrol

The present invention is directed to selective catalytic reduction catalysts that combine SCR activity with NOx absorber activity. In particular, the disclosed catalytic article includes a substrate having a first and a second material disposed thereon, wherein the first material includes a selective catalytic reduction (SCR) catalyst composition and the second material includes a nitrogen oxides (NOx) absorber composition, wherein the NOx absorber composition does not substantially oxidize ammonia, and wherein the catalytic article is effective to abate NOx from an engine exhaust gas stream. Emission treatment systems for treating an exhaust gas including a catalytic article of the invention are provided, particularly systems that include an injector adapted for the addition of ammonia to the exhaust gas stream located upstream of the catalytic article.

Combined NOx absorber and SCR catalyst

The present invention relates to diesel oxidation catalyst compositions and catalyst articles, wherein the compositions and articles include a plurality of platinum group nanoparticles substantially in fully reduced form, wherein the nanoparticles have an average particle size of about 1 to about 10 nm and at least about 90% of the nanoparticles have a particle size of +/&#x2212; about 2 nm of the average particle size. Such compositions can further include a refractory metal oxide material, wherein the nanoparticles and refractory metal oxide material can be combined within the same coating on a substrate or can be applied sequentially on a substrate. The nanoparticles can advantageously be substantially free of halides, alkali metals, alkaline earth metals, sulfur compounds, and boron compounds. Methods of preparing and using such compositions and catalyst articles (e.g., for the treatment of diesel exhaust gas streams) are also provided herein.

Diesel oxidation catalyst comprising platinum group metal nanoparticles

The present disclosure generally provides low-temperature nitrogen oxides (NO) adsorbers used in the treatment of a NO-containing exhaust gas stream and to methods of preparing and using the same. In particular, the NOadsorber composition includes an active metal and a metal oxide support, wherein the metal oxide support includes greater than 50% by weight ceria based on the total weight of the NOadsorber composition, and wherein the active metal includes about 0.01% to about 5% by weight ruthenium based on the total weight of the NOadsorber composition.

Ruthenium impregnated ceria catalyst

Emissions treatment systems of combustion engines are provided, which comprise a platinum-containing catalyst that is degreened during production, which is before exposure to operating conditions of a vehicle having a diesel engine. The platinum-containing catalyst, in the form of a platinum component on a high surface area refractory metal oxide support, exhibits a vibration frequency of about 2085 to about 2105 cm&#x2212;1 as measured by CO-DRIFTS. Such catalytic material is essentially-free of platinum oxide species found at greater than about 2110 cm&#x2212;1 as measured by CO-DRIFTS. Such catalysts can provide excellent and consistent conversion of nitrogen oxide (NO) to nitrogen dioxide (NO2).

The present invention relates to a process for preparing a catalyst, at least comprising the steps of adding a protecting agent to an aqueous solution of a metal precursor to give a mixture (M1), adding a reducing agent to mixture (M1) to give a mixture (M2), adding a support material to mixture (M2) to give a mixture (M3), adjusting the pH of mixture (M3), and separating the solid and liquid phase of mixture (M3). Furthermore, the present invention relates to the catalyst as such and its use as diesel oxidation catalyst.

Preparation of diesel oxidation catalyst via deposition of colloidal nanoparticles

A catalyst for the treatment of exhaust gas emissions is disclosed. The catalyst can comprise ceria-alumina particles having a ceria phase present in a weight percent of the composite in the range of about 20% to about 80% on an oxide basis, an alkaline earth metal component supported on the ceria-alumina particles, wherein the CeOis present in the form of crystallites that are hydrothermally stable and have an average crystallite size less than 160 &#x212b; after aging at 950&#xb0; C. for 5 hours in 2% Oand 10% steam in N.

Catalyst with improved hydrothermal stability

A lean NOtrap for the treatment of exhaust gas emissions, such as the oxidation of unburned hydrocarbons (HC), and carbon monoxide (CO), and the trapping and reduction of nitrogen oxides (NO) is disclosed. Nitrogen oxide storage catalysts can comprise a layer on a substrate including ceria-alumina particles having a ceria phase present in a weight percent of the composite in the range of about 20% to about 80% on an oxide basis, an alkaline earth metal component supported on the ceria-alumina particles, wherein the CeOis present in the form of crystallites that are hydrothermally stable and have an average crystallite size less than 130 &#x212b; after aging at 950&#xb0; C. for 5 hours in 2% Oand 10% steam in N.

[object Object]

A diesel oxidation catalyst for the treatment of exhaust gas emissions, such as the oxidation of unburned hydrocarbons (HC) and carbon monoxide (CO) is described. Also described is a novel washcoat composition including a surface-coated zeolite coated with at least one of zirconia and alumina, and a platinum group metal supported on a high surface area alumina.

Surface-coated zeolite materials for diesel oxidation applications

The present invention relates to a layered diesel oxidation catalyst (DOC) comprising: a) a carrier substrate; b) a diesel oxidation catalytic material comprising b1) a first layer located on the carrier substrate, the first layer comprising palladium impregnated on a support material comprising ceria in an amount of at least 45 weight-% based on the total weight of the support material, and optionally comprising platinum; b2) a second layer located on the first layer, the second layer comprising palladium and platinum each impregnated on a support material comprising a metal oxide; wherein the platinum to palladium weight ratio of the first layer is lower than the platinum to palladium weight ratio of the second layer.

Diesel oxidation catalyst with layered structure containing ceria composition as palladium support material for enhanced HC and CO gas conversion

Diesel oxidation catalysts, catalytic articles, methods of making catalytic articles, emissions treatment systems and methods of treating an exhaust gas stream using the catalytic articles for the treatment of exhaust gas emissions, such as the oxidation of unburned hydrocarbons (HC) and carbon monoxide (CO) are described. Specific catalytic articles comprising a substrate with a first washcoat layer comprising greater than or equal to about 2% by weight palladium dispersed on a ceria support and a second washcoat layer comprising a platinum group metal and a refractory metal oxide are described.

Diesel oxidation catalyst articles and methods of making and using

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Princeton, NJ, United States of America

Xinyi Wei