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Visar resultat 1 - 5 av 186 uppsatser som matchar ovanstående sökkriterier.

  1. 1. Thermal Conversion of Cellulose-Lignin Precursors into Carbon Fibres

    Uppsats för yrkesexamina på avancerad nivå, Uppsala universitet/Nanoteknologi och funktionella material

    Författare :Sofia Westberg; [2023]
    Nyckelord :Carbon fiber; lignin; cellulose; continuous conversion;

    Sammanfattning : Carbon fibres are used in many applications thanks to their exceptional tensile properties in relation to their relatively low weight. These thin strands of at least 90% carbon are mixed with a matrix such as epoxy to form composites used for cars, wind turbines, prosthetics, and many other things. LÄS MER

  3. 2. Stability improvement to a ruthenium catalyst for partial oxidation of methane

    Master-uppsats, Lunds universitet/Kemiteknik (CI)

    Författare :Melker Axelsson; [2023]
    Nyckelord :catalysis; reaction engineering; kinetics; partial oxidation; chemical engineering; Technology and Engineering;

    Sammanfattning : Catalytic partial oxidation of methane (CPOM) is an energy-efficient alternative to steam reforming, the currently prevailing method for energy production from natural gas. Hulteberg Chemistry & Engineering AB has developed a catalyst for the partial oxidation of methane into syngas, for use in solid oxide fuel cells. LÄS MER

  4. 3. Reducing cost and CO2 emissions in the gasoline to electric vehicle fleet transition

    Uppsats för yrkesexamina på avancerad nivå, Uppsala universitet/Elektricitetslära

    Författare :Emil Grund Stålvinge; [2023]
    Nyckelord :electric car; electric conversion; bldc; li-ion; lion; lipo; li-po; volvo; elbil; elbilar; elkonvertering; bldc; li-ion; lion; lipo; li-po; volvo;

    Sammanfattning : If you buy a new electric car today it will take on average about ten years for you to start saving money compared to just continue driving your old gasoline car. It will also take about 4 years until you start saving carbon dioxide emissions, both of this is because of new production costs and emissions. LÄS MER

  5. 4. Fabrication and characterization of GaAsxP1-x single junction solar cell on Si for III-V/Si tandem solar cell

    Master-uppsats, KTH/Tillämpad fysik

    Författare :Elaheh Aghajafari; [2023]
    Nyckelord :III-V semiconductor; GaAsxP1-x heteroeputaxy; hydride vapor phase epitaxy; III-V Si solar cell; III-V halvledare; GaAsxP1-x epitaxiallager; hydridångfasepitaxi; III-V Si solcell;

    Sammanfattning : Silicon based solar cells have been used as photovoltaic devices for decades due to reasonable cost and environment- friendly nature of silicon. But the conversion efficiency of silicon solar cell is limited; for instance, the maximum conversion efficiency of a crystalline silicon solar cell available in the market developed by Kaneka Corporation is 26 % [1]. LÄS MER

  7. 5. Förutsättningar för ökad omställningshastighet till elektrifierade transporter inom godstransportbranschen. : En kvalitativ studie kring adoptionen av elektrifieringslösningar för tunga transporter.

    Uppsats för yrkesexamina på avancerad nivå, Blekinge Tekniska Högskola/Institutionen för industriell ekonomi

    Författare :Anas Aljaouni; [2023]
    Nyckelord :Heavy transport; electrified trucks; transition; adoption; innovation.; Tunga transporter; elektrifierade lastbilar; omställning; adoption; innovation.;

    Sammanfattning : In an age where sustainability and reduced carbon dioxide emissions are highly prioritized, the transport sector faces one of its biggest challenges. Namely, reducing the environmental impact of heavy transport. LÄS MER