Catalyst for exhaust gas purification and method for...

B - Operations – Transporting – 01 – J

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B01J 23/58 (2006.01) B01D 53/94 (2006.01) F01N 3/10 (2006.01)

Patent

CA 2740472

A catalyst for exhaust gas purification of the present invention contains the thin-plate-like ceria (CeO2) as a catalytic active component. According to the catalyst for exhaust gas purification of the present invention, among CO, HC, and NOx, which are hazardous components contained in exhaust gas, particularly, NOx, can be removed efficiently. The present invention can be used as, what is called a NOx trapping catalyst, which stores NOx in oxidizing atmosphere, and discharges and reduces NOx in reducing atmosphere.

L'invention porte sur un catalyseur pour gaz d'échappement, qui contient de l'oxyde de cérium (CeO2) en plaque mince en tant que constituant actif de catalyseur. Le catalyseur pour gaz d'échappement peut particulièrement éliminer de façon efficace les NOx parmi des constituants nuisibles, notamment CO, HC et les NOx, contenus dans un gaz d'échappement. Par conséquent, le catalyseur pour gaz d'échappement peut être utilisé en tant que catalyseur dit catalyseur piège à NOx, lequel adsorbe les NOx dans une atmosphère oxydante mais désorbe/réduit les NOx dans une atmosphère réductrice.

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