Sökning: "selective catalytic reaction SCR"

Hittade 4 uppsatser innehållade orden selective catalytic reaction SCR.

  1. 1. Defining Black: Characterization of Soot Reactivity with Thermogravimetrical Methods : Definiera svart: Karaktärisering av sotreaktivitet med termogravimetriska metoder

    Master-uppsats, KTH/Tillämpad fysik

    Författare :Adarsh Roy Choudhury; [2020]
    Nyckelord :Diesel Particulate Filter; Chemical Kinetics;

    Sammanfattning : Exhaust emissions in a vehicle has to flow through an exhaust aftertreatment in a diesel vehicle. In a diesel engine, the exhaust emissions are treated with Diesel Oxidation Catalyst (DOC), Diesel Particulate Filter (DPF), and Selective Catalytic Reduction (SCR). Every engine produces a different kind of soot depending on the drive cycle. LÄS MER

  3. 2. CFD-simulations of urea-waterspray in an after-treatment systemusing Star-CCM+

    Master-uppsats, KTH/Mekanik

    Författare :Emelie Trigell; [2018]
    Nyckelord :after-treatment systems; selective catalytic reaction SCR ; AdBlue; multiphase flow; multi-component liquid; Unsteady Reynolds Average Navier Stokes RANS ; wall film formation; solid deposits; efterbehandlingssystem; selektiva katalytiska reaktioner; AdBlue; flerfasstr ¨ommning; flerkomponentvätska; Unsteady Reynolds Average Navier Stokes; väggfilm; avlagringar;

    Sammanfattning : The legislation has forced the vehicle industry to reduce tail-end emissions. The air pollutant nitrogen oxide (NOX) has been shown to have a negative impact on human health and the environment. One of the key technologies to reduce the levels of NOX emitted from a vehicle is by implementing an after-treatment system. LÄS MER

  4. 3. Modellering av åldring av dieseloxidationskatalysatorer

    Master-uppsats, KTH/Skolan för kemivetenskap (CHE)

    Författare :Filip Gruvnäs; [2015]
    Nyckelord :Diesel oxidation catalyst; Aging; NO oxidation; Equivalent thermal load; Sulfur;

    Sammanfattning : A conventional exhaust gas after treatment system (EATS) for the Euro VI legislation contains four different catalyst. The first two (particulate filter system) remove particulates and the last two (SCR system) remove nitrogen oxides (NOx). LÄS MER

  5. 4. Workshop Methods for Troubleshooting the Performance of the After-treatment system

    Master-uppsats, KTH/Maskinkonstruktion (Inst.)

    Författare :André Åkerberg; Daniel Törnroos; [2013]
    Nyckelord :;

    Sammanfattning : New legislations are constantly arising in Europe that puts stringent restrictions on the emissions coming from heavy-duty vehicles. The latest one is the Euro VI that has tough limits on both nitrogen oxides (NOx) and particulate matter (PM). LÄS MER