Non-stoichiometric perovskite oxide oxidation catalyst for oxidizing NO into NO2

The invention relates to a non-stoichiometric perovskite oxide oxidation catalyst for oxidizing NO into NO2, in particular to a non-stoichiometric perovskite oxide with a chemical formula of LaXMnOY, wherein the molar ratio ('X') of lanthanum to magnesium is 0.85-0.95, and the oxide can be...

Ausführliche Beschreibung

Gespeichert in:

Bibliographische Detailangaben
Hauptverfasser:	W.LI, X.WANG, G.QI, M.SHEN
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL SEPARATION THEIR RELEVANT APPARATUS TRANSPORTING
Online-Zugang:	Volltext bestellen
Tags:	Tag hinzufügen Keine Tags, Fügen Sie den ersten Tag hinzu!

Beschreibung
Zusammenfassung:	The invention relates to a non-stoichiometric perovskite oxide oxidation catalyst for oxidizing NO into NO2, in particular to a non-stoichiometric perovskite oxide with a chemical formula of LaXMnOY, wherein the molar ratio ('X') of lanthanum to magnesium is 0.85-0.95, and the oxide can be used as the oxidation catalyst which is used for oxidizing NO of an exhaust gas aftertreatment system of an engine which takes hydrocarbon as fuel into NO2 in a particle form. The oxygen content ('Y') varies along with the molar ratio of lanthanum to magnesium and fluctuates, but is generally among 3.0 and 3.30. Lattice adjustment which is stimulated by the molar ratio of non-stoichiometric lanthanum to magnesium is supposedly the reason why the NO oxidation activity is improved compared with the similar perovskite oxide which has higher molar ratio of lanthanum to magnesium.