METHOD AND APPARATUS FOR COMBINATION OF NON-THERMAL PLASMA FOR DIESEL ENGINE EXHAUST GAS POST-TREATMENT SYSTEM AND gamma-ALUMINA DOPED WITH METAL OR METAL OXIDE

PROBLEM TO BE SOLVED: To provide a method and an apparatus in which non-thermal plasma is combined with a metal-doped γ-alumina catalyst for treating oxygen-rich exhaust gas in order to solve the problem that in a conventional catalyst system for treating oxygen-rich exhaust gas, the percentage of N...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Hauptverfasser: HABEGER CRAIG F, PARK PAUL W, BALMER-MILLAR MARI LOU, AARDAHL CHRISTOPHER L, KOSHKARIAN KENT A, CHANDA ASHOK
Format: Patent
Sprache:eng
Schlagworte:
Online-Zugang:Volltext bestellen
Tags: Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
Beschreibung
Zusammenfassung:PROBLEM TO BE SOLVED: To provide a method and an apparatus in which non-thermal plasma is combined with a metal-doped γ-alumina catalyst for treating oxygen-rich exhaust gas in order to solve the problem that in a conventional catalyst system for treating oxygen-rich exhaust gas, the percentage of NOx reduction is 7-12 in a passive system and 25-40% when an additional hydrocarbon reducing agent is injected into an exhaust gas flow. SOLUTION: When oxygen-rich exhaust gas is treated by non-thermal plasma and then treated by γ-alumina prepared by a metal-doped sol-gel method, the percentage of NOx reduction is about 90% in the absence of SO2 and 80% in the presence of SO2. The remarkable improvement is accomplished when indium, gallium, and tin are used.