| 摘要 |
A passive NOx adsorber comprising a noble metal-MAZ zeolite is disclosed. The passive NOx adsorber is effective to adsorb NOx at or below a low temperature, such as 250oC and release the adsorbed NOx at temperatures above the low temperature. The passive NOx adsorber comprises a noble metal, such as palladium, and a molecular sieve having a MAZ Framework Type, selected from ZSM-4, LZ-202, mazzite and omega zeolite. The invention also includes an exhaust system comprising the passive NOx adsorber, and a method for treating exhaust gas from an internal combustion engine utilizing the passive NOx adsorber. |
