CATALYSED PARTICULATE FILTER AND METHOD FOR THE PREPARATION OF A CATALYSED PARTICULATE FILTER
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United States of America Patent
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May 22, 2014
app pub date -
Jun 14, 2012
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Jul 13, 2011
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Abstract
Wall flow particulate filter catalysed at its inlet side with a catalyst having activity in the removal of residual hydro-carbons and carbon monoxide and catalysing at rich burn engine operation conditions the reaction of nitrogen oxides with hydrogen and/or carbon monoxide to ammonia and catalysed at its outlet side with a catalyst having activity in the selective reduction of NOx by reaction with ammonia being formed in the inlet side.
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