Mixed metal oxide catalyst for decomposition of nitrogen oxides
AssigneeSangmyung University, Council for Industry Academic Cooperation
InventorsKil Sang Chang, Xiaoshan Peng, Seo Young Park, Ki Seon Yang, A Reum Han
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Abstract
The present invention relates to a mixed metal oxide catalyst in which a hydrotalcite precursor containing an alkali metal is impregnated or intercalated with a nonprecious metal, a method of manufacturing the same, and a method of decomposing nitrogen oxide using the mixed metal oxide catalyst. The mixed metal oxide catalyst has excellent catalytic activity because it can decompose NOx, N2O or a mixture thereof even at low temperature, and is economical because it does not use a precious metal.
Claims9
A mixed metal oxide catalyst for decomposition of nitrogen oxides, in which a hydrotalcite precursor containing an alkali metal is impregnated or intercalated with a nonprecious metal.
A method of manufacturing a mixed metal oxide catalyst for decomposition of nitrogen oxides, comprising the steps of:
- providing a hydrotalcite precursor containing an alkali metal;
- impregnating or intercalating the hydrotalcite precursor with a nonprecious metal;
- and
- calcinating the hydrotalcite precursor impregnated or intercalated with the nonprecious metal at a temperature of 100˜1000° C. to form a mixed metal oxide catalyst
A method of decomposing nitrogen oxide using a mixed metal oxide catalyst, comprising the step of reacting nitrogen oxide including nitrogen oxides including N2O, NOx and a mixture thereof with a gas mixture including a reductant in the presence of a mixed metal oxide catalyst in which a hydrotalcite precursor containing an alkali metal is impregnated or intercalated with a nonprecious metal.
Dependencies are inferred from the claim text.