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Found 5 essays matching the above criteria.

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

   University essay from KTH/Kemiteknik

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

   Abstract : 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. READ MORE

3. 2. Understanding particulate matter - Material analyses of real-life diesel particulate filters and correlation to vehicles’ operational data

   University essay from KTH/Kemiteknik

   Author : Linus Nordin; [2021]
   Keywords : Diesel particulate filter; Ash measurement method development; Correlation study; Operational parameters; Principal component analysis; Dieselpartikelfilter; Askanalys metodutveckling; Korrelationsstudie; Driftsparametrar; Principal component analysis;

   Abstract : Syftet med denna studie var att undersöka effekterna av driftsparametrar på ett antal mätbara askrelaterade parametrar i dieselpartikelfilter (DPF) i tunga fordon. Tidigare studier visar att askans packningsdensitet, askflöde och hur askan fördelas inuti ett DPF är beroende av parametrar som temperatur, avgasflöde och oljeförbrukning ett fordon har. READ MORE

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

   University essay from KTH/Tillämpad fysik

   Author : Adarsh Roy Choudhury; [2020]
   Keywords : Diesel Particulate Filter; Chemical Kinetics;

   Abstract : 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. READ MORE

5. 4. Catching Ash : Methodology for ash accumulation in diesel particulate filters

   University essay from KTH/Materialvetenskap

   Author : Charis Pavlou; [2019]
   Keywords : diesel engine; diesel particulate filter; particulate matter; testing rig; accelerating ash accumulation;

   Abstract : The diesel particulate filter captures particulate matter that is produced in the diesel engine. A small fraction of particulate matter is comprised by ash forming matter. When the combustible fraction of particulate matter is removed from the filter, the ash, which is incombustible, remains. READ MORE

6. 5. Chemical analysis for mapping of soot reactivity

   University essay from KTH/Skolan för kemivetenskap (CHE)

   Author : Henrik Pettersson; [2013]
   Keywords : diesel soot; reactivity; oxidation; rail pressure; EGR; TGA; SEM; EDS;

   Abstract : In order to increase the efficiency of diesel particulate filter regeneration more knowledge about diesel soot and its reactivity is required. This thesis compares soot created during accelerated filter loading by lowered rail pressure, with soot from normal filter loading. READ MORE