PASSIVE NO ADSORBER COMPRISING NOBLE METAL AND SMALL PORE MOLECULAR SIEVE Russian patent published in 2018 - IPC B01D53/94 B01J29/74 B01J23/44

Abstract RU 2675905 C1

FIELD: environmental protection.

SUBSTANCE: invention relates to the purification of exhaust gases. Disclosed is a passive NO_x adsorbent, effective for adsorption of NO_x at a temperature of 200 °C or lower and for the release of adsorbed NO_x at temperatures above the specified temperature. Disclosed passive NO_x adsorbent comprises a noble metal and a small pore molecular sieve having a maximum ring size of eight tetrahedral atoms. Exhaust system for an internal combustion engine and a method for reducing the content of nitrogen oxides in the exhaust gas are also disclosed.

EFFECT: invention provides effective purification from nitrogen oxides.

14 cl, 4 tbl, 5 ex

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RU 2 675 905 C1

Authors

Chen Khaj-In

Radzharam Radzh Rao

Lyu Dunsya

Dates

2018-12-25—Published

2014-12-08—Filed