Essays about: "SCR"

Showing result 1 - 5 of 45 essays containing the word SCR.

  1. 1. Transient Flow Simulations in Exhaust After Treatment Systems

    University essay from Linköpings universitet/Mekanisk värmeteori och strömningslära

    Author : John Walder; [2020]
    Keywords : Computational Fluid Dynamics; exhaust after treatment system; ammonia mixing;

    Abstract : The exhaust after treatment system is responsible for removing particulates and contaminants from the exhaust gases. The flow entering the SCR, a catalyst utilizing ammonia to reduce NOx emissions, was studied. The quality and distribution of flow entering the SCR plays an important role in the efficiency of the systems. READ MORE

  2. 2. CFD Simulation of Urea Evaporation in STAR-CCM+

    University essay from Linköpings universitet/Mekanisk värmeteori och strömningslära

    Author : Oscar Ottosson; [2019]
    Keywords : Urea; AdBlue; SCR; Solid Deposit; NOx; nitrogen oxides; CFD; speedup; spray simulation; UWS; diesel after-treatment; STAR-CCM ; AVL Fire; Scania; Sweden; NXPS; LiU; DOE; Urea; AdBlue; SCR; Klump; NOx; kvävedioxider CFD; uppsnabbning; spray simulering; UWS; efterbehandling av diesel-motor; STAR-CCM ; AVL Fire; Scania; Sverige; NXPS; LiU; DOE;

    Abstract : Diesel engines produce large amounts of nitrogen oxides (NOX) while running. Nitrogen oxides are highly toxic and also contribute towards the formation of tropospheric ozone. READ MORE

  3. 3. Novel Ammonia Storage Materials for SCR Systems : Carbon Materials – Salt Composites

    University essay from Luleå tekniska universitet/Institutionen för teknikvetenskap och matematik

    Author : Nicolas Grimaldos Osorio; [2019]
    Keywords : magnesium chloride; ammonia; carbon materials; SCR; NOx reduction; sorption;

    Abstract : The emissions of nitrogen oxides (NOx) are a serious environmental problem due to its relationship with the formation of smog, acid rain and because they are dangerous for human and animal health. These gases are produced in high quantities in diesel engines used for automotive applications, and different strategies are being used to reduce them, among which are the Selective Catalytic Reduction (SCR) systems. READ MORE

  4. 4. 3D Printed NovelZeolite 13X - Magnesium ChlorideComposites for Ammonia Storage

    University essay from Luleå tekniska universitet/Institutionen för teknikvetenskap och matematik

    Author : Rafael Acosta Laisequilla; [2019]
    Keywords : Ammonia absorption 3D printing Zeolites;

    Abstract : In today’s world regulations to reduce vehicle emissions are only gettingtougher, from said regulations the concept of a Selective Catalytic Reduction(SCR) unit was born, designed to provide a healthy dose of ammonia (NH3)to reduce the NOx compound into harmless components such as water andnitrogen. In this thesis novel approaches where investigated, by combiningthe fast physical absorption and desorption properties of a highly porous ma-terial such as zeolites with the high storage capacity of metal chlorides wecan potentially improve NH3 dosing in the low temperature operating range,such as when vehicles have just been turned on. READ MORE

  5. 5. Characterisation of NH3 adsorption on a V-SCR catalyst

    University essay from Luleå tekniska universitet/Kemiteknik

    Author : Elin Sjöberg; [2019]
    Keywords : ;

    Abstract : All around the world the environmental focus is growing rapidly.The aim of thismaster’s thesis has been to work on developing experimental methodologies to achieve qualitatively, reliable and optimal data used on modelling. READ MORE