| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a catalyst which has excellent heat resistance and is capable of efficiently removing nitrogen oxide and to provide a method for removing nitrogen oxide by using the catalyst and an apparatus for removing nitrogen oxide, which is provided with the catalyst. <P>SOLUTION: A compound oxide of metals composed of tungsten, zirconium and cerium contains cerium oxide of 10-30 wt.% and tungsten oxide of 5-14 wt.%, has excellent heat resistance and is capable of efficiently removing nitrogen oxide in the presence of ammonia. Therefore, the catalyst containing the compound oxide composed of tungsten oxide, zirconium oxide and cerium oxide and cerium oxide of 10-30 wt.% and tungsten oxide of 5-14 wt.% is useful in removing nitrogen oxide. <P>COPYRIGHT: (C)2008,JPO&INPIT |
