Process for the catalytic exhaust gas aftertreatment of engine combustion emissions

US6931841B2 · kind B2 · utility

Assignee

• Bayerische Motoren Werke Aktiengesellschaft · DE

Inventors

• Michael Preis · Königsbrunn, DE
• Hans Fickel · Moosburg an der Isar, DE
• Juergen Ringler · Kissing, DE

Key dates

• Filing date: Dec 13, 2002
• Grant date: Aug 23, 2005
• Expiry date: Dec 13, 2022

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F02B3/06
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

For the regeneration of an NOx storage catalyst by means of hydrogen in a secondary hydrogen process, the hydrogen required for the regeneration is taken from a primary hydrogen process.