Sökning: "Diesel oxidation catalyst"

Visar resultat 1 - 5 av 14 uppsatser innehållade orden Diesel oxidation catalyst.

  1. 1. Effect of ash on catalytic activity for passive regeneration of catalytic diesel particulate filter : Evaluation of ash deposition by laboratory ageing

    Master-uppsats, KTH/Kemiteknik

    Författare :Gisela Engström; [2022]
    Nyckelord :Diesel Particulate Filter; Ash deposition; Laboratory Ageing; Catalytic Activity; Passive regeneration;

    Sammanfattning : Askackumulering i dieselpartikelfilter är ett välkänt problem som resulterar i ett förhöjt mottryck och påverkad prestanda hos fordonet. Däremot ges sällan uppmärksamhet åt filtrets katalytiska aktivitet och hur det påverkas vid förekomst av avgasföroreningar. LÄS MER

  3. 2. 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

  4. 3. Sulfur poisoning and regeneration of copper zeolites for NH3-SCR : Effect of SO2/SO3 ratio

    Uppsats för yrkesexamina på avancerad nivå, Luleå tekniska universitet/Kemiteknik

    Författare :Åsa Högström; [2018]
    Nyckelord :Cu-zeolites; Ammonia-SCR; Sulfur poisoning; Regeneration; Kinetic model;

    Sammanfattning : The road transportation is a big source for the release of NOx emissions. NOx has been confirmed to cause negative affect on the air-quality especially in the urban areas, there are therefore regulations for allowed released amount from vehicles. LÄS MER

  5. 4. Effect of Biofuel Impurities on the Diesel Oxidation Catalyst

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

    Författare :Liene Kienkas; [2017]
    Nyckelord :DIESEL OXIDATION CATALYST; POISONING; PHOSPHORUS; SODIUM; CALCIUM; MATERIAL CHARACTERIZATION; ACTIVITY TESTING;

    Sammanfattning : Scania provides sustainable transport systems powered by bioethanol, biogas, biodiesel along with hybrid and conventional solutions. Today Scania offers the largest variety of engines operating on alternative fuels in the market. The number of the alternative fuel operated vehicles sold in 2016 increased by 40 % [1]. LÄS MER

  7. 5. PILCs for trapping phosphorus in a heavy duty engine exhaust system : An experimental evaluation of the phosphorus sorption capability of different clay materials

    Uppsats för yrkesexamina på avancerad nivå, Uppsala universitet/Strukturkemi

    Författare :Anders Kvarned; [2016]
    Nyckelord :PILC; PCH; phosphorus sorption; exhaust treatment; catalyst poisoning;

    Sammanfattning : In order to fulfil the requirements in the EURO VI standard, regulating emissions from heavy duty vehicles, the exhaust aftertreatment system needs to maintain its efficiency for at least seven years or 700 000 km. In diesel applications the diesel oxidation catalyst (DOC) is located closest to the engine and is thus the most vulnerable to poisoning contaminants, such as phosphorus originating from fuel and oil additives, which deactivates the catalyst. LÄS MER