MATERIAL AND METHOD FOR ADSORPTION AND DESORPTION OF NITRIC OXIDES IN EXHAUST GASES

摘要

To produce the adsorption of nitric oxides in an adsorbent, a preliminary stage of oxidation of nitric oxide is foreseen. BR/ The mixed oxide has an orthorhombic structure rich in oxygen which is transformed as a function of the temperature in a tetragonal structure low in oxygen. A system (2) for treating the exhaust gas of an internal combustion engine comprises an adsorbent (3) followed by a catalyst (4) with three channels. BR/ Applicable to the purification of gas of exhaust of internal combustion engines of automobiles, in particular of engines operating with a lean gas mixture.