Patents by Inventor Jaya L. Mohanan
Jaya L. Mohanan has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11717814Abstract: The present disclosure recognizes a correlation between zeolitic surface area (ZSA) of a catalyst composition and its catalytic activity. Particularly, the disclosure provides catalyst articles for diesel NOx abatement, including a substrate and a washcoat layer containing metal-promoted molecular sieves, wherein the zeolitic surface area (ZSA) of the catalyst article is about 100 m2/g or greater, the volumetric surface area is about 900 m2/in3 or greater, and/or the total zeolitic surface area (tZSA) is about 1200 m2 or greater. The disclosure further relates to methods for evaluating ZSA, volumetric ZSA, and tZSA, e.g.Type: GrantFiled: June 8, 2018Date of Patent: August 8, 2023Assignee: BASF CORPORATIONInventors: Ivan Petrovic, Jaya L. Mohanan, Joseph J. Petenko
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Patent number: 11448110Abstract: Certain selective catalytic reduction (SCR) articles, systems and methods provide for high NOx conversion while at the same time low N2O 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.Type: GrantFiled: August 4, 2017Date of Patent: September 20, 2022Assignee: BASF CorporationInventors: Wen-Mei Xue, Jeff H. Yang, Stanley A. Roth, Kenneth E. Voss, Sandip D. Shah, Jaya L. Mohanan
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Patent number: 11344868Abstract: Certain selective catalytic reduction (SCR) articles, systems and methods provide for high NOx conversion while at the same time low N2O 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.Type: GrantFiled: August 4, 2017Date of Patent: May 31, 2022Assignee: BASF CorporationInventors: Jeff H. Yang, Wen-Mei Xue, Stanley A. Roth, Kenneth E. Voss, Qi Fu, Subramanian Prasad, Barbara K. Slawski, Jaya L. Mohanan, Sandip D. Shah
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Patent number: 11154815Abstract: 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.Type: GrantFiled: February 26, 2016Date of Patent: October 26, 2021Assignee: BASF CorporationInventors: Kenneth E. Voss, Jaya L. Mohanan, Kevin A. Hallstrom, Sandip D. Shah, John K. Hochmuth
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Publication number: 20210008533Abstract: Described are catalytic articles comprising a substrate having a washcoat on the substrate, the washcoat containing a catalytic component having a first average (D50) particle size and a functional binder component having a second average (D50) particle size in the range of about 10 nm to about 1000 nm, wherein the ratio of the first average (D50) particle size to the second average (D50) particle size is greater than about 10:1. The catalytic articles are useful in methods and systems to purify exhaust gas streams from an engine.Type: ApplicationFiled: September 9, 2020Publication date: January 14, 2021Inventors: Gary A. Gramiccioni, Jaya L. Mohanan, John K. Hochmuth, Kenneth R. Brown, Brian Todd Jones
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Patent number: 10864508Abstract: Described are catalytic articles comprising a substrate having a washcoat on the substrate, the washcoat containing a catalytic component having a first average (D50) particle size and a functional binder component having a second average (D50) particle size in the range of about 10 nm to about 1000 nm, wherein the ratio of the first average (D50) particle size to the second average (D50) particle size is greater than about 10:1. The catalytic articles are useful in methods and systems to purify exhaust gas streams from an engine.Type: GrantFiled: January 15, 2016Date of Patent: December 15, 2020Assignee: BASF CorporationInventors: Gary A. Gramiccioni, Jaya L. Mohanan, John K. Hochmuth, Kenneth R. Brown, Brian Todd Jones
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Patent number: 10792648Abstract: 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.Type: GrantFiled: October 30, 2015Date of Patent: October 6, 2020Assignee: BASF CorporationInventors: Jaya L. Mohanan, Jeff Yang, Patrick Burk, Kenneth E. Voss
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Patent number: 10786808Abstract: Described is a selective catalytic reduction material comprising a spherical particle including an agglomeration of crystals of a molecular sieve. The catalyst is a crystalline material that is effective to catalyze the selective catalytic reduction of nitrogen oxides in the presence of a reductant at temperatures between 200° C. and 600° C. A method for selectively reducing nitrogen oxides and an exhaust gas treatment system are also described.Type: GrantFiled: August 23, 2017Date of Patent: September 29, 2020Assignee: BASF CorporationInventors: Natalia Trukhan, Ulrich Müller, Michael Breen, Barbara Slawski, Qi Fu, Jaya L. Mohanan, Martin W. Kraus, Ahmad Moini, Xiaofan Yang, John K. Hochmuth
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Publication number: 20200188895Abstract: The present disclosure recognizes a correlation between zeolitic surface area (ZSA) of a catalyst composition and its catalytic activity. Particularly, the disclosure provides catalyst articles for diesel NOx abatement, including a substrate and a washcoat layer containing metal-promoted molecular sieves, wherein the zeolitic surface area (ZSA) of the catalyst article is about 100 m2/g or greater, the volumetric surface area is about 900 m2/in3 or greater, and/or the total zeolitic surface area (tZSA) is about 1200 m2 or greater. The disclosure further relates to methods for evaluating ZSA, volumetric ZSA, and tZSA, e.g.Type: ApplicationFiled: June 9, 2017Publication date: June 18, 2020Inventors: Ivan Petrovic, Jaya L. Mohanan, Joseph J. Petenko
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Patent number: 10471413Abstract: 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.Type: GrantFiled: May 16, 2018Date of Patent: November 12, 2019Assignee: BASF CorporationInventors: Jaya L. Mohanan, Gary A. Gramiccioni, John Hochmuth, Kenneth E. Voss
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Publication number: 20190170042Abstract: Certain selective catalytic reduction (SCR) articles, systems and methods provide for high NOx conversion while at the same time low N2O 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.Type: ApplicationFiled: August 4, 2017Publication date: June 6, 2019Inventors: Wen-Mei Xue, Jeff H. Yang, Stanley A. Roth, Kenneth E. Voss, Sandip D. Shah, Jaya L. Mohanan
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Publication number: 20190168199Abstract: Certain selective catalytic reduction (SCR) articles, systems and methods provide for high NOx conversion while at the same time low N2O 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.Type: ApplicationFiled: August 4, 2017Publication date: June 6, 2019Inventors: Jeff H. Yang, Wen-Mei Xue, Stanley A. Roth, Kenneth E. Voss, Qi Fu, Subramanian Prasad, Barbara K. Slawski, Jaya L. Mohanan, Sandip D. Shah
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Publication number: 20180297014Abstract: 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.Type: ApplicationFiled: May 16, 2018Publication date: October 18, 2018Inventors: Jaya L. Mohanan, Gary A. Gramiccioni, John Hochmuth, Kenneth E. Voss
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Patent number: 9931620Abstract: Described are catalyst materials and catalytic articles comprising a metal exchanged SAPO material comprising a plurality of substitutional sites consisting essentially of Si(4Al) sites and substantially free of Si(0Al) sites. The materials and catalytic articles are useful in methods and systems to catalyze the reduction of nitrogen oxides in the presence of a reductant.Type: GrantFiled: September 29, 2017Date of Patent: April 3, 2018Assignee: BASF CorporationInventors: Subramanian Prasad, Martin C. Wende, Jaya L. Mohanan
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Publication number: 20180043305Abstract: 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.Type: ApplicationFiled: February 26, 2016Publication date: February 15, 2018Inventors: Kenneth E. Voss, Jaya L. Mohanan, Kevin A. Hallstrom, Sandip D. Shah, John K. Hochmuth
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Publication number: 20180021764Abstract: Described are catalyst materials and catalytic articles comprising a metal exchanged SAPO material comprising a plurality of substitutional sites consisting essentially of Si(4Al) sites and substantially free of Si(0Al) sites. The materials and catalytic articles are useful in methods and systems to catalyze the reduction of nitrogen oxides in the presence of a reductant.Type: ApplicationFiled: September 29, 2017Publication date: January 25, 2018Inventors: Subramanian Prasad, Martin C. Wende, Jaya L. Mohanan
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Publication number: 20180008973Abstract: Described are catalytic articles comprising a substrate having a washcoat on the substrate, the washcoat containing a catalytic component having a first average (D50) particle size and a functional binder component having a second average (D50) particle size in the range of about 10 nm to about 1000 nm, wherein the ratio of the first average (D50) particle size to the second average (D50) particle size is greater than about 10:1. The catalytic articles are useful in methods and systems to purify exhaust gas streams from an engine.Type: ApplicationFiled: January 15, 2016Publication date: January 11, 2018Inventors: Gary A. Gramiccioni, Jaya L. Mohanan, John K. Hochmuth, Kenneth R. Brown, Brian Todd Jones
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Publication number: 20170368541Abstract: Described is a selective catalytic reduction material comprising a spherical particle including an agglomeration of crystals of a molecular sieve. The catalyst is a crystalline material that is effective to catalyze the selective catalytic reduction of nitrogen oxides in the presence of a reductant at temperatures between 200° C. and 600° C. A method for selectively reducing nitrogen oxides and an exhaust gas treatment system are also described.Type: ApplicationFiled: August 23, 2017Publication date: December 28, 2017Inventors: Natalia Trukhan, Ulrich Müller, Michael Breen, Barbara Slawski, Qi Fu, Jaya L. Mohanan, Martin W. Kraus, Ahmad Moini, Xiaofan Yang, John K. Hochmuth
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Publication number: 20170333883Abstract: 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.Type: ApplicationFiled: October 30, 2015Publication date: November 23, 2017Inventors: Jaya L. Mohanan, Jeff Yang, Patrick Burk, Kenneth E. Voss
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Patent number: 9802182Abstract: Described are catalyst materials and catalytic articles comprising a metal exchanged SAPO material comprising a plurality of substitutional sites consisting essentially of Si(4Al) sites and substantially free of Si(0Al) sites. The materials and catalytic articles are useful in methods and systems to catalyze the reduction of nitrogen oxides in the presence of a reductant.Type: GrantFiled: March 12, 2014Date of Patent: October 31, 2017Assignee: BASF CorporationInventors: Subramanian Prasad, Martin C. Wende, Jaya L. Mohanan