Mixed zeolite NOx catalyst

US6489259B2 · kind B2 · utility

Assignee

• Delphi Technologies · US

Inventors

• William LaBarge · Bay City, US
• Mark Hemingway · Columbiaville, US
• Joachim Kupe · Davisburg, US
• Galen B. Fisher · Bloomfield Hills, US

Key dates

• Filing date: Dec 29, 2000
• Grant date: Dec 3, 2002
• Expiry date: Dec 29, 2020

Classification

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

Abstract

A multiple zeolite catalyst mixture for purifying exhaust gases from an internal combustion engine, comprising: a first NO2 to N2 to conversion catalyst component; a second O3 conversion catalyst component; a third HC conversion catalyst component; a fourth N2O decomposition catalyst component; and, a fifth VOC reduction catalyst component; wherein the catalyst component mixture includes about 50 to 75 weight percent of the first and second catalyst components, and about 25 to 50 weight percent of the third, fourth, and fifth catalyst components.