Adsorption for nitrogen oxides, and exhaust emission control...

Details Adsorption for nitrogen oxides, and exhaust emission control... Adsorption for nitrogen oxides, and exhaust emission control...

B - Operations, Transporting

01

J

B01J 20/06 (2006.01) B01D 53/94 (2006.01) B01J 23/10 (2006.01) B01J 29/06 (2006.01) B01J 29/40 (2006.01) B01J 29/44 (2006.01)

Patent

CA 2150376

An adsorption material exhibiting a superior adsorption capability relative to nitrogen oxides (NO) is constituted by a ceramic of oxide system having an average crystal diameter D, D < 500 .ANG. such as CeO2. A catalyst is, for example, constituted by CeO2 and zeolite and C content of CeO2 is set to satisfy 10 weight % <= C <= 80 weight %. Zeolite adsorbs hydrocarbon (HC), and HC so adsorbed is oxidized to activated CHO by CeO2. Activated CHO reduces NO adsorbed to CeO2.

Un matériau d'adsorption présentant des capacités d'adsorption supérieures par rapport à des oxydes nitriques (NO) est constitué d'une céramique de système d'oxyde présentant un diamètre D moyen de cristaux, D < 500 .ANG. tel que CeO¿2?. Un catalyseur est constitué, par exemple, de CeO¿2? et d'une zéolite, et la teneur en C de CeO¿2? est établie pour satisfaire à 10 % en poids <= C <= 80 % en poids. La zéolite adsorbe les hydrocarbures (HC), et les HC ainsi adsorbés sont oxydés en CHO activés, par CeO¿2?. Le CHO activé réduit le NO adsorbé en CeO¿2?.

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