| 摘要 |
<p>A catalyst, for purifying an exhaust gas, is a zeolite catalyst for removing nitrogen oxides, carbon monoxide and hydrocarbons from an oxygen-rich exhaust gas containing the nitrogen oxides, carbon monoxide and hydrocarbons, wherein the zeolite has an SiO2/Al2O3 molar ratio of 10 or more and contains nickel, or wherein the zeolite has an SiO2/Al2O3 molar ratio of 15 or more, and contains nickel and a rare earth metal or an alkaline earth metal.</p> |
