Preparation method of vanadium/titania-based catalyst showing excellent nitrogen oxide-removal performance at wide temperature window through introduction of ball milling, and use thereof
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United States of America Patent
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Jan 3, 2012
Grant Date -
Mar 5, 2009
app pub date -
Mar 20, 2007
filing date -
Apr 3, 2006
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Abstract
Disclosed are a method for preparing a catalyst, which has excellent nitrogen oxide-removal performance and resistance over a wide temperature range, and the use of the catalyst. According to the disclosed method, the oxidation number and surface defects of the catalyst are changed by applying artificial high energy through mechanical ball milling during the preparation process of the catalyst, instead of applying the addition of a precious metal, the deformation of a support and the use of a co-catalyst in order to increase NOx removal activity, such that activation energy for inducing redox reactions can be decreased.
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