Palladium/Zeolites as Model Catalysts for Cold Start Passive NOx Adsorption

Yuntao Gu
Reducing NOx emissions is challenging during engine or aftertreatment system warm up due to the low exhaust temperatures and thus limited reaction kinetics. NOx emitted during this period is often referred to as cold start NOx emissions and represents one of the main obstacles in emissions regulations compliance. Passive NOx adsorbers (PNA) have been proposed to help address cold start NOx emissions via low temperature NOx trapping and subsequent thermal release, such that NOx generated...
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