Particulate filter with hydrogen sulphide block function

US8709365B2 · kind B2 · utility

Assignee

• UMICORE AG & CO. KG · DE

Inventors

• Franz Dornhaus · Scheinfeld, DE
• Stéphanie Frantz · Soest, DE
• Ina Grisstede · Mannheim, DE

Key dates

• Filing date: Jul 8, 2010
• Grant date: Apr 29, 2014
• Expiry date: Jun 16, 2031

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01D2257/304
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

The invention relates to a catalytically active particulate filter which, in addition to the properties typical of particulate filters, has hydrogen sulphide block function, and to a process for removing nitrogen oxides and particulates from the exhaust gas of internal combustion engines operated predominantly under lean conditions (so-called “lean-burn engines”) using the inventive catalytically active particulate filter. This particulate filter comprises a filter body, a copper compound and an oxidation-catalytic active coating which comprises at least one catalytically active platinum group metal. The copper compound is in a second coating applied to the filter body. The two functional coatings may be applied to the filter body consecutive in the direction of flow, i.e. zoned, or layered one on top of the other.