Method for catalytic reduction of nitrogen oxide emissions
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United States of America Patent
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Issued Date -
Sep 18, 2003
app pub date -
Apr 10, 2003
filing date -
Feb 7, 2000
priority date (Note) -
Abandoned
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Abstract
The present invention concerns a process for trapping NO.sub.x, in the treatment of with a view to reducing emissions of oxides of nitrogen. The process of the invention is characterized in that a massive catalyst is used based on an oxide with formula (1): A.sub.xMn.sub.1-yB.sub.yO.sub.2.+-..delta. in which A represents one or more elements selected from groups IA, IIA, IIIA of the periodic table; B is a metal selected from tin and elements from groups IVA to IIIB of the periodic table; x and y have the following values: 0.16.ltoreq.x.ltoreq.1 and 0.ltoreq.y.ltoreq.0.5, the oxide having a lamellar or tunnel structure.
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