Method for preparing a catalyst for selective catalytic reduction of nitrogen oxides
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United States of America Patent
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Aug 5, 2003
Grant Date -
May 16, 2002
app pub date -
Sep 25, 2001
filing date -
Sep 27, 2000
priority date (Note) -
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Abstract
Disclosed are a catalyst for selective catalytic reduction of nitrogen oxides and a method for preparing the same. The catalyst is prepared using a spent catalyst discharged from a hydro-desulfurization process of an oil refinery in which the spent catalyst comprises vanadium, nickel, molybdenum and sulfur component on alumina, and a tungsten-impregnated support. The catalyst prepared in accordance with the present invention is very advantageous in terms of excellent selective removal effect of nitrogen oxides as well as better poisoning resistance to sulfur oxides.
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