| 摘要 |
<p>A method of removing nitrogen oxides contained in an exhaust gas, which comprises bringing the exhaust gas in an oxidizing atmosphere into contact with a catalyst composed of a catalytically active component comprising 0.1-30 g/l-catalyst of at least one noble metal selected from the group consisting of Pt, Pd, Rh and Ru or a compound thereof and 1-80 g/l-catalyst of at least one metal selected from the group consisting of Li, K, Na, Rb, Ce, Be, Mg, Ca, Sr and Ba or a compound thereof and a refractory inorganic oxide to thereby cause the catalyst to adsorb the nitrogen oxides contained in the exhaust gas, and then introducing intermittently a reducing substance into the exhaust gas to thereby reduce the nitrogen oxides adsorbed onto the catalyst, thus cleaning the exhaust gas. <IMAGE></p> |
