Exhaust gas treatment catalysts

US10906032B2 · kind B2 · utility

Assignees

• BASF SE
• N.E. CHEMCAT CORPORATION · JP

Inventors

• Xiaolai Zheng · Princeton Junction, US
• Michel Deeba · East Brunswick Township, US
• Xiaofan Yang · Knoxville, US
• Qi Fu · Shanghai, CN
• Knut Wassermann · Princeton, US
• Makoto Nagata · Kobe, JP
• Yasuharu Kanno · Ichikawa, JP
• Hiroki Nakayama · Wako, JP

Key dates

• Filing date: Aug 18, 2016
• Grant date: Feb 2, 2021
• Expiry date: Aug 18, 2036

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02T10/12
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

Described are catalysts effective to abate NOx, hydrocarbons, and carbon monoxide from a gasoline engine exhaust gas. Such catalysts include a substrate having a first and second material disposed thereon, the first material effective to catalyze selective catalytic reduction of nitrogen oxides in the presence of ammonia and the second material effective to abate hydrocarbons and carbon monoxide, the first material comprising a molecular sieve promoted with copper and/or iron in a low loading, the second material comprising at least one oxide of Ni, Fe, Mn, Co, and Cu on a support selected from oxides of Ce, Ce—Zr, Zr, Mn, Pr and combinations thereof. Also described are gasoline engine exhaust gas treatment systems and methods of treating exhaust gas from a gasoline engine.