Exhaust treatment system and method for treatment of an exhaust stream

US10260391B2 · kind B2 · utility

Assignee

• Scania CV AB · SE

Inventors

• Magnus Nilsson · Lund, SE
• Henrik Birgersson · Stockholm, SE

Key dates

• Filing date: Feb 27, 2015
• Grant date: Apr 16, 2019
• Expiry date: Sep 13, 2035

Classification

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

Abstract

An exhaust treatment system is provided for treatment of an exhaust stream, where the system comprises a first dosage device, arranged to supply a first additive into said exhaust stream and a first reduction catalyst device, arranged downstream for reduction of nitrogen oxides in said exhaust stream through the use of said first additive, and for the generation of heat through at least one exothermal reaction with said exhaust stream. A particulate filter arranged downstream of said first reduction catalyst device to catch soot particles. A second dosage device arranged downstream of said particulate filter to supply a second additive into said exhaust stream and a second reduction catalyst device, arranged downstream of said second dosage device for reduction of nitrogen oxides in said exhaust stream through the use of at least one of said first and said second additive.