Basf Corporation

Basf Catalysts LLC

Rive Technology, Inc.

W.r. Grace & Co. -conn.

R Samuel Boorse

Joseph Charles Dettling

Matthew Tyler Caudle

Ahmad Moini

Joseph Allan Patchett

Patrick L Burk

Gerald Stephen Koermer

Wen-Mei Xue

Ivor Bull

William Michael Jaglowski

Martin Dieterle

Torsten Neubauer

Chung-Zong Wan

Xiaolai Zheng

Kenneth Edwin Voss

Susanne Stiebels

Claudia Wendt

Sanath V Kumar

Claudia Zabel

Kunhao Li

Joseph A Patchett

Suzanne Stiebels

Patrick Burk

William M Jaglowski

E Kenneth Voss

Zeolite catalysts and systems and methods for preparing and using zeolite catalysts having the CHA crystal structure are disclosed. The catalysts can be used to remove nitrogen oxides from a gaseous medium across a broad temperature range and exhibit hydrothermal stable at high reaction temperatures. The zeolite catalysts include a zeolite carrier having a silica to alumina ratio from about 15:1 to about 256:1 and a copper to alumina ratio from about 0.25:1 to about 1:1.

Copper CHA zeolite catalysts

Provided are emissions treatment systems for an exhaust stream having an ammonia-generating component, such as a NOx storage reduction (NSR) catalyst or a lean NOx trap (LNT) catalyst, and an SCR catalyst disposed downstream of the ammonia-generating catalyst. The SCR catalyst can be a molecular sieve having the CHA crystal structure, for example SSZ-13 or SAPO-34, which can be ion-exchanged with copper. The LNT can be layered, having an undercoat washcoat layer comprising a support material, at least one precious metal, and at least one NOx sorbent selected from the group consisting of alkaline earth elements, rare earth elements, and combinations thereof and a top washcoat layer comprising a support material, at least one precious metal, and ceria in particulate form, the top washcoat layer being substantially free of alkaline earth components. The emissions treatment system is advantageously used for the treatment of exhaust streams from diesel engines and lean burn gasoline engines.

Emissions treatment system with ammonia-generating and SCR catalysts

Methods for introducing mesoporosity into zeolitic materials are described herein that employ an acid treatment, an optional surfactant treatment, and a base treatment without filtration or purification steps between the steps. In particular, the process generally involves subjecting a zeolitic material to an acid treatment followed by a surfactant treatment and base treatment. The methods can efficiently introduce mesoporosity into various zeolitic materials, such as zeolites.

Preparation of mesoporous zeolites with reduced processing

Provided are selective catalytic reduction catalytic articles, emission treatment systems and methods for simultaneously remediating the nitrogen oxides (NO), particulate matter, and gaseous hydrocarbons present in diesel engine exhaust streams. The catalytic articles have a Selective Catalytic Reduction (SCR) catalyst uniformly coated over the outlet portion of wall flow filter walls resulting in reduction of NOand combustion of the soot without substantially increasing the system backpressure.

Wall flow filter loaded with SCR catalyst, systems and methods of exhaust gas treatment

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

Catalytic articles, systems and methods for treating exhaust gas streams are described. A catalytic article comprising a wall flow filter having gas permeable walls, a hydrolysis catalyst, an optional soot oxidation catalyst, a selective catalytic reduction catalyst permeating the walls, an ammonia oxidation catalyst and an oxidation catalyst to oxidize CO and hydrocarbons is described. Methods of treating exhaust gas streams comprising soot, an ammonia precursor such as urea, ammonia, NO, CO and hydrocarbons are also provided.

Multi-component filters for emissions control

Growing community of inventors

Skillman, NJ, United States of America

R Samuel Boorse