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Patent Agency Ranking
公开(公告)号：US12203403B2
公开(公告)日：2025-01-21
申请号：US15552305
申请日：2016-03-18
Applicant: BASF CORPORATION
Inventor： Weiyong Tang , Sanath V. Kumar , Kevin A. Hallstrom , David M. Youngren , Kenneth E. Voss
Abstract: 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 NO2 is available to facilitate passive oxidation of soot trapped on the particulate filter by reaction with NO2. Systems and methods utilize such catalytic articles, and further include, e.g., a downstream selective catalytic reduction catalyst on a flow through substrate.
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公开(公告)号：US20240293805A1
公开(公告)日：2024-09-05
申请号：US18030267
申请日：2021-10-05
Applicant: BASF Corporation
Inventor： David M. Youngren , Xiaofan Yang , Xinyi Wei , Matthew T. Caudle
IPC: B01J29/072 , B01D53/94 , B01J35/33 , B01J35/56
CPC classification number: B01J29/072 , B01D53/945 , B01J35/33 , B01J35/56 , B01D2255/206 , B01D2255/207 , B01D2255/50 , B01D2255/91 , B01D2255/9155 , B01D2257/404 , B01D2258/012 , B01D2258/014 , B01D2258/018
Abstract: The application provides articles, systems, and methods for adsorbing and desorbing nitrogen oxides (NOx) at desired temperatures. The catalytic article comprises a NOx adsorber composition comprising a platinum group metal (PGM) component disposed on or impregnated in a support material, and a substrate, wherein the catalytic article further comprises a magnetic material capable of inductive heating in response to an applied alternating electromagnetic field. The catalytic article further comprises a conductor associated therewith for receiving current and generating an alternating electromagnetic field in response thereto, wherein the conductor is positioned such that the generated alternating electromagnetic field is applied to at least a portion of the magnetic material. This field can inductively heat the magnetic material to heat the NOx adsorber composition to desorb the NOx from the NOx adsorber composition.
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公开(公告)号：US11268420B2
公开(公告)日：2022-03-08
申请号：US16971236
申请日：2019-02-18
Applicant: BASF Corporation
Inventor： Kenneth E. Voss , Kevin A. Hallstrom , Sandip D. Shah , David M. Youngren , Andrew Thoms , M. Shahjahan Kazi , Robert Dorner
Abstract: 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.
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公开(公告)号：US20210079826A1
公开(公告)日：2021-03-18
申请号：US16971236
申请日：2019-02-18
Applicant: BASF Corporation
Inventor： Kenneth E. Voss , Kevin A. Hallstrom , Sandip D. Shah , David M. Youngren , Andrew Thoms , M. Shahjahan Kazi , Robert Dorner
Abstract: 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.
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公开(公告)号：US20180045097A1
公开(公告)日：2018-02-15
申请号：US15552305
申请日：2016-03-18
Applicant: BASF CORPORATION
Inventor： Weiyong Tang , Sanath V. Kumar , Kevin A. Hallstrom , David M. Youngren , Kenneth E. Voss
CPC classification number: F01N3/208 , B01D53/9418 , B01D53/944 , B01D53/9477 , B01D2255/50 , B01D2255/9155 , B01D2257/404 , B01D2258/012 , B01J29/072 , B01J29/76 , B01J29/763 , B01J35/0006 , B01J35/04 , B01J37/0246 , B01J2229/18 , F01N3/035 , F01N2570/14 , F01N2610/02 , Y02A50/2325 , Y02A50/2345 , Y02T10/24
Abstract: 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 NO2 is available to facilitate passive oxidation of soot trapped on the particulate filter by reaction with NO2. Systems and methods utilize such catalytic articles, and further include, e.g., a downstream selective catalytic reduction catalyst on a flow through substrate.
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