Catalytically active material and catalytic converter for the selective catalytic reduction of nitrogen oxides

US8911697B2 · kind B2 · utility

Assignee

• UMICORE AG & CO. KG · DE

Inventors

• Nicola Soeger · Nidderau, DE
• Katja Adelmann · Darmstadt, DE
• Michael Seyler · Rodenbach, DE
• Thomas R. Pauly · Lansing, US
• Gerald Jeske · Neuberg, DE

Key dates

• Filing date: Mar 1, 2012
• Grant date: Dec 16, 2014
• Expiry date: Mar 1, 2032

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01J2229/42
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

The invention relates to a catalytically active material for reacting nitrogen oxides with ammonia in the presence of hydrocarbons. The material consists of an inner core (1) made of a zeolite exchanged with one or more transition metals or a zeolite-like compound exchanged with one or more transition metals. The core of the catalytically active material is encased by a shell (2), which is made of one or more oxides selected from silicon dioxide, germanium dioxide, aluminum oxide, titanium oxide, tin oxide, cerium oxide, zirconium dioxide, and mixed oxides thereof.