| 摘要 |
PURPOSE:To obtain a nitrogen oxide decomposing catalyst without adding a reducing agent by compounding alkali (earth) metal oxide, metal oxide such as Co3O4 or Cu2O and metal such as Ru or Rh or oxide thereof. CONSTITUTION:A nitrogen oxide decomposing catalyst contains alkali metal and/or alkaline earth metal oxide such as magnesium oxide or calcium oxide, metal oxide such as Co3O4, Cu2O or Cr2O3 and metal such as Ru, Rh or Pd or oxide thereof as essential components. The catalyst thus obtained decomposes nitrogen oxide contained in exhaust gas directly even in a relatively high temp. region of about 300-800 deg.C with high efficiency without adding a reducing agent such as ammonia. |
