Method for decomposing nitrogen oxides with Mixed Metal Oxide Catalyst

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PURPOSE : A method for decomposing rare nitrogen oxides using mixed metal oxide-based catalyst is provided to implement a nitrogen oxides decomposing process using CO and HC contained in an exhaust gas as a reducer.CONSTITUTION : A catalyst layer, including one or more from a group including mixed metal oxide-based catalyst based on hydrotalcite compound precursor or brucite compound precursor, a catalyst obtained by adhering or interlayer combining precious metal with the mixed metal oxide-based catalyst, a catalyst obtained by adding a promoter to the mixed metal oxide-based catalyst and adhering or interlayer-combining non-precious metal with the mixed metal oxide-based catalyst, is prepared. An exhaust gas passes through the catalyst layer, and the nitrogen oxide of the exhaust gas is absorbed in the catalyst layer. The nitrogen absorbed in the catalyst layer is decomposed or detached.COPYRIGHT KIPO 2011