Umicore's advanced catalytic systems for light-duty diesel vehicles are designed to significantly reduce harmful emissions like oxides of nitrogen (NOx), hydrocarbon (HC) carbon monoxide (CO), particulate emissions and other pollutants. By leveraging cutting-edge technologies, Umicore provides efficient emission control, enhancing both environmental protection and engine performance. 

Umicore is a leader in the clean mobility transformation and accomplishes this by continued development of advanced technologies. 

  • Diesel Oxidation Catalysts reduce the amount of CO and hydrocarbons in the exhaust gas by oxidizing them to carbon dioxide and water. The oxidation of NO to NO2 is another important function of DOCs, enabling a faster reduction of NOx with NH3 on the downstream SCR technologies when NO2 is present.
  • NOx Storage Catalyst (NSC): The first step of the storage mechanism is the oxidation of NO to NO2 on the precious metals of the catalyst, mainly Platinum (Pt). This NO2 is subsequently stored on the corresponding storage materials (e.g., Barium Carbonate BaCO3) incorporated in the catalyst formulation until the desired storage capacity is reached.
     
    The NSC is operated non-continuously, i.e., it needs to be regenerated periodically by means of rich exhaust gas (λ<1) to decompose the nitrates and reduce them.
  • Catalyzed Diesel Particulate Filters (cDPF) reduce particulate matter, oxidize HC, and CO in exhaust to CO2 and H2O and form NO2 from NO oxidation to support the functionality of a downstream selective catalytic reduction (SCR).
  • SCR-Catalyzed Diesel Particulate Filters (SDPFs) filter particulate matter, convert them periodically, and reduce NOx in the exhaust gas.
  • Selective Catalytic Reduction (SCR) - Depending on the NO/NO2 content in the exhaust gas, two important main Selective Catalytic Reduction (SCR) reactions are without NO2: Standard SCR and with NO2: Fast SCR.
  • Ammonia Slip Catalysts (ASC) follow a smart catalyst design to mitigate the emission of slipped NH3 out of SCR. The catalyst combines the key NH3 oxidation function with an SCR function.
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