Sökning: "hydrotreating"

Visar resultat 1 - 5 av 7 uppsatser innehållade ordet hydrotreating.

  1. 1. Chelating agents in NiMo sulfided catalysts and the effect of nitrogen compounds on hydrodearomatization and hydrodenitrogenation reactions

    Master-uppsats, KTH/Kemiteknik

    Författare :Lilla Lukovicsová; [2022]
    Nyckelord :hydrotreating; NiMo Al2O3; HDN; HDA; trickle-bed microreactor; Type I and II hydrotreating catalysts; Hydrering; NiMo Al2O3; HDN; HDA; porlbädd reaktor; Typ I och II hydrering katalysatorer;

    Sammanfattning : Hydrering är en viktig process för att producera produkter med önskade egenskaper samt att uppfylla de lagliga krav som existerar med avseende på miljö och hälsa. Reaktionerna som sker vid hydreringen är katalytiska vilket innebär att förstå sam utnyttja de mest lämpliga katalysatorerna är av yttersta vikt. LÄS MER

  3. 2. Generation of Model NiMo Hydrotreating Nano-catalyst via the Spark Discharge Technique

    Master-uppsats, Lunds universitet/Kemiteknik (CI)

    Författare :Hatoon Makhool; [2020]
    Nyckelord :Model catalyst systems; hydrotreating catalysts; NiMo catalysts; Spark discharge technique; nanoparticles; chemical engineering; kemiteknik; Technology and Engineering;

    Sammanfattning : Establishing a technically practical method to generate representative model catalysts for the use in characterizations and testing prior to catalyst implementation in chemical process units would allow for a more sophisticated understanding of the underlying catalytic mechanisms. As a step towards establishing such a method, generating non-agglomerated, spherical NiMo nanoparticles, with diameters below 25 nm and atomic composition of maximum 30 at% Ni with Mo (maximum 3:7 Ni:Mo atomic ratio), for application as model hydrotreating catalysts, was addressed. LÄS MER

  4. 3. Inhibition Kinetics of Hydrogenation of Phenanthrene

    Master-uppsats, KTH/Skolan för kemi, bioteknologi och hälsa (CBH)

    Författare :Johannes Johansson; [2019]
    Nyckelord :Catalytic hydrotreating; Phenanthrene; Inhibition kinetics; Model development; Nonlinear regression;

    Sammanfattning : In this thesis work the hydrogenation kinetics of phenanthrene inhibited by the basic nitrogen compound acridine and the non-basic carbazole was investigated. Based on a transient reactor model a steady state plug flow model was developed and kinetic parameters were estimated through nonlinear regression to experimental data. LÄS MER

  5. 4. Catalytic hydrotreating of lignin

    Master-uppsats, Lunds universitet/Kemiteknik (CI)

    Författare :Markus Lilja; [2019]
    Nyckelord :Lignin; hydrotreating; kemiteknik; chemical engineering; Chemistry; Technology and Engineering;

    Sammanfattning : One of the main challenge’s society faces today is climate change caused by CO2 due to the de-pendence on fossil fuels. To combat the increasing CO2 levels there is a need to develop renewable fuels. One such fuel could potentially be derived from lignin. In this thesis, lignin derived from a pulp and paper mill was first treated and cleaned. LÄS MER

  7. 5. Catalytic fast pyrolysis of softwood under N2 and H2 atmosphere

    Master-uppsats, KTH/Energi- och ugnsteknik

    Författare :Shule Wang; [2017]
    Nyckelord :pyrolysis; CFP; bioenergy; 生物质; 生物能源; ;

    Sammanfattning : Bio-oil generated from biomass is becoming one of the most promising alternatives as potential energy sources to replace fossil fuels in the transportation sector. Fast pyrolysis of biomass is one of the most economically feasible ways to produce bio-oil according to recent research on thermochemical conversion of biomass. LÄS MER