| 摘要 |
<p>Nitric oxide is reduced in the presence of organic compounds under excess oxygen conditions by passing nitric oxide and an organic compound over a catalyst made of at least one noble metal such as platinum and rhodium on a stable dealuminated Y zeolite from which non framework alumina has been removed. The so treated Y zeolite has a unit cell of less than 24.40 and a mesopore surface area of over 70 m2/g. In a preferred case the treatment of the Y zeolite removes more than 40 % of the number of initial non framework A1 atoms per unit cell. The catalyst is more stable and less susceptible to poisoning by SO¿2? and water than non-noble metal catalysts.</p> |
