FIELD: emission purification.
SUBSTANCE: invention relates to a composition of a catalyst-adsorber of NOx containing a carrier and one or more platinum group metals located on this carrier, where one or more platinum group metals are selected from a group consisting of palladium, platinum, or a mixture or alloy of platinum and palladium, where the carrier contains cerium oxide, and where the carrier contains a mixed doping NOx preservation amplifier, where a mixed doping NOx preservation amplifier contains a mixture of neodymium and samarium or oxides thereof. The invention also relates to a catalyst-adsorber of NOx, an emission purification system for purifying the flow of combustion exhaust gas, a method for purifying exhaust gas from an internal combustion engine.
EFFECT: development of compositions of a catalyst-adsorber of NOx, which have improved parameters of low-temperature preservation of NOx and, in certain embodiments, are more easily activated by preliminary reduction and retain this activation after contact with oxidizing conditions.
12 cl, 2 dwg, 15 tbl, 9 ex
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|---|---|---|---|
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|
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