Effects of Pd/CeO2 on the Abatement of Unburnt Hydrocarbon Emissions from Gasoline Vehicles during the Cold-Start Period

High Resolution Image Download MS PowerPoint Slide Unburnt hydrocarbon emissions from gasoline vehicles contribute to air pollution and pose health risks, necessitating effective removal strategies. Conventional three-way catalysts (TWCs) effectively oxidize hydrocarbons to CO 2 at temperatures above 250 °C. However, the increasing adoption of turbocharged gasoline engines, which emit exhaust gases at significantly lower temperatures (∼300 °C versus ∼ 800 °C in conventional vehicles), has renewed concerns over hydrocarbon emissions. The primary challenge is the prolonged warm-up time of catalytic converters, during which TWCs remain largely ineffective. To address this, we developed a dual-function Pd/CeO 2 catalyst capable of retaining unburnt hydrocarbons through adsorption during cold start and promoting their oxidation at elevated temperatures. Propylene (C 3 H 6 ), a representative …