NOx reduction catalyst having excellent low-temperature characteristics
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United States of America Patent
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Mar 10, 2009
Grant Date -
Oct 25, 2007
app pub date -
Jul 28, 2005
filing date -
Jul 29, 2004
priority date (Note) -
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Abstract
A NOx removal catalyst comprising a carrier that includes a zeolite, and preferably a β-zeolite, that has undergone ion exchange with iron, and ferric oxide supported on the carrier. This NOx removal catalyst can be used favorably in a selective catalytic reduction process wherein nitrogen oxides contained in the exhaust gas from a diesel engine are reduced and removed by ammonia.
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