Method and device for the purification of diesel exhaust gases

US10001053B2 · kind B2 · utility

Assignee

• UMICORE AG & CO. KG · DE

Inventors

• Paul Spurk · Weiterstadt, DE
• Marcus Pfeifer · Mannheim, DE
• Hendrik-David Noack · Hanau, DE

Key dates

• Filing date: Jun 24, 2009
• Grant date: Jun 19, 2018
• Expiry date: Jan 6, 2033

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02T10/40
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

The invention proposes a method for the purification of exhaust gases which are generated by a diesel engine with a charging turbine, and a special device for carrying out said method. The device comprises, in the flow direction of the exhaust gas, a dosing device for a reducing agent from a reducing agent reservoir (2), an SCR catalytic converter (3), an oxidation catalytic converter (4) and a diesel particle filter (5). The system is particularly suitable for the purification of the exhaust gases of diesel vehicles in which engines with a turbocharger (charging turbine (1)) and an exhaust-gas recirculation device are used, which engines generate exhaust gases which, in addition to carbon monoxide, hydrocarbons and particles, have nitrogen oxides with an NO2/NOX ratio of between 0.3 and 0.7.