NOVEL METAL-CONTAINING ZEOLITE BETA FOR NOx REDUCTION AND METHODS OF MAKING THE SAME
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United States of America Patent
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Nov 24, 2011
app pub date -
May 18, 2011
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May 21, 2010
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Abstract
There is disclosed an organic-free, metal-containing zeolite Beta with a silica-to-alumina ratio (SAR) ranging from 5 and 20, and a metal content of at least 0.5 wt. %. There is also disclosed a method of making such a zeolite Beta without organic structure directing agent (SDA). The metal, which may comprise Fe or Cu, can be found in amounts ranging from 1-10 wt. %. A method of selective catalytic reduction of nitrogen oxides in exhaust gases using the disclosed zeolite is also disclosed.
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