| 摘要 |
<p>The invention pertains to a porous material for catalytic conversion of exhaust gases, comprising an oxidation catalyst able to catalyse oxidation of nitrogen monoxide into nitrogen dioxide and to catalyse oxidation of a reducing agent. According to the invention, the oxidation of the reducing agent is prevented since the reducing agent is sterically prevented from coming into contact with the oxidation catalyst. Preferably, the porous material also comprises a carrier with a reduction catalyst having the ability to selectively catalyse reduction of nitrogen dioxide into nitrogen, whereby the reducing agent is at least partially consumed. The invention also relates to a method and an arrangement which utilize the porous material, and an advantageous use of the porous material. The invention may be applied within the field of catalytic conversion of exhaust gases, originating from internal combustion engines, particularly Lean Combustion engines and diesel engines.</p> |
