Scr catalyst for removal of nitrogen oxides

Abstract

The present invention provides for catalysts for selective catalytic reduction of nitrogen oxides. The catalysts comprise metal oxide supporters, vanadium, an active material, and antimony, a promoter that acts as a catalyst for reduction of nitrogen oxides, and at the same time, can promote higher sulfur poisoning resistance and low temperature catalytic activity. The amount of antimony of the catalysts is preferably 0.5-7 wt %.

1 . A ammonia SCR catalyst for reduction of nitrogen oxides comprising:
 a carrier; and   vanadium oxide as an active material on the supporter; and   antimony as a promoter that reduces sulfur poisoning and enhances low temperature catalytic activity.   
   
   
       2 . The catalyst of  claim 1 , wherein the supporter is at least one from the group consisted of titanium oxide, silicate, zirconia, alumina and the mixture thereof. 
   
   
       3 . The catalyst of  claim 1 , wherein 1˜3 wt. % of the vanadium is used. 
   
   
       4 . The catalyst of  claim 1 , wherein 0.5˜7 wt. % of the antimony is used.