MUMBAI, India, July 31 -- Intellectual Property India has published a patent application (202617064713 A) filed by Basf Mobile Emissions Catalysts LLC on May 22, 2026, for Ammonia Oxidation Catalyst With Twc Functionality For Gasoline Applications.
Inventors include Dumbuya, Karifala; Schwekendiek, Holger; Kinne, Markus; and Caudle, Matthew T.
The application for the patent was published on July 24, 2026, under issue no. 30/2026.
Abstract: The present invention relates to an exhaust gas treatment system for treating an exhaust gas stream exiting a gasoline engine, wherein said exhaust gas treatment system has an upstream end for introducing said exhaust gas stream into said exhaust gas treatment system, and wherein said exhaust gas treatment system comprises (i) a first catalyst, being a three-way conversion catalyst, having an inlet end and an outlet end and comprising a coating disposed on a substrate, wherein the coating comprises one or more platinum group metals selected from the group consisting of Pt, Pd, Rh, and mixtures of two or more thereof, supported on a support material; (ii) a second catalyst, being a four-way conversion catalyst, having an inlet end and an outlet end and comprising a coating disposed on a wall flow filter substrate, wherein the coating comprises one or more platinum group metals selected from the group consisting of Pt, Pd, Rh, and mixtures of two or more thereof, supported on a support material; or a gasoline particle filter having an inlet end and an outlet end; (iii) a third catalyst having an inlet end and an outlet end, wherein the third catalyst comprises a substrate and a coating for the oxidation of ammonia (AMOx), as well as for the reduction of nitrogen oxide, the oxidation of carbon monoxide and the oxidation of hydrocarbons (TWC), wherein the coating of the third catalyst comprises one or more platinum group metals selected from the group consisting of Pt, Pd, Rh, and mixtures of two or more thereof, supported on a support material, wherein the coating of the third catalyst comprises one or more zeolitic materials, and wherein the coating of the third catalyst comprises rhodium and/or an oxygen storage compound; wherein the first catalyst according to (i) is the first catalyst of the exhaust gas treatment system downstream of the upstream end of the exhaust gas treatment system and wherein the inlet end of the first catalyst is arranged upstream of the outlet end of the first catalyst; wherein in the exhaust gas treatment system, the second catalyst according to (ii) is located downstream of the first catalyst according to (i) and wherein the inlet end of the second catalyst is arranged upstream of the outlet end of the second catalyst; wherein in the exhaust gas treatment system, the third catalyst according to (iii) is located downstream of the second catalyst according to (ii) and wherein the inlet end of the third catalyst is arranged upstream of the outlet end of the third catalyst.
Disclaimer: Curated by HT Syndication.
