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

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...

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Hauptverfasser: W.LI, X.WANG, G.QI, M.SHEN
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CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY
PERFORMING OPERATIONS
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
SEPARATION
THEIR RELEVANT APPARATUS
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creator W.LI
X.WANG
G.QI
M.SHEN
description 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.
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subjects CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY
PERFORMING OPERATIONS
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
SEPARATION
THEIR RELEVANT APPARATUS
TRANSPORTING
title Non-stoichiometric perovskite oxide oxidation catalyst for oxidizing NO into NO2
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