Method for preparing a catalyst for reduction of nitrogen oxides
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United States of America Patent
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Jan 6, 2004
Grant Date -
May 23, 2002
app pub date -
Sep 25, 2001
filing date -
Sep 27, 2000
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Abstract
The catalyst is prepared by recycling a spent catalyst discharged from a hydro-desulfurization process of an oil refinery in which the spent catalyst comprises an alumina support with a large specific surface area impregnated with low contents of vanadium and high contents of molybdenum. The thus prepared catalyst has more excellent selective removal activity of nitrogen oxides at a high temperature window by containing suitable amounts of metal components therein as well as a better poisoning resistance to sulfur oxides, compared with the conventional catalysts.
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