Sökning: "koldioxid"

Visar resultat 21 - 25 av 554 uppsatser innehållade ordet koldioxid.

  1. 21. Evaluation of material properties after laser welding on ductile cast iron

    Kandidat-uppsats, KTH/Materialvetenskap

    Författare :Olivia Taivalkoski; [2019]
    Nyckelord :Laser welding; ductile cast iron;

    Sammanfattning : Scania wants to lower the weight of their trucks, including the goal to reduce the carbon dioxide emissions, and one way to do that is to use laser welding instead of fastenings.This bachelor thesis work is about laser welding of ductile cast iron, or spheroidal graphite cast iron or nodular cast iron, to QT-steels and case hardening steel and evaluation of the mechanical properties of the weld. LÄS MER

  2. 22. Design of Ultra High Performance Fibre Reinforced Concrete Bridges : A Comparative Study to Conventional Concrete Bridges

    Uppsats för yrkesexamina på avancerad nivå, Luleå tekniska universitet/Institutionen för samhällsbyggnad och naturresurser

    Författare :Viktor Eriksson; [2019]
    Nyckelord :Bridge design; CO2 emissions; Mechanical properties and behaviour; Straight short steel fibres; UHPC; UHPFRC; Bro dimensionering; CO2 utsläpp; Korta raka stålfibrer; Mekaniska egenskaper och beteende; UHPC; UHPFRC;

    Sammanfattning : The use of Ultra High Performance Fibre Reinforced Concrete (UHPFRC) in the construction industry started in the 1990s and has since then been used for bridges all over the world. The mechanical properties and the dense matrix result in lower material usage and superior durability compared to conventional concrete, but the implementation of UHPFRC in the Swedish industry has been delayed. LÄS MER

  3. 23. Observing phase changes in real time on ultrathin Iron oxide surfaces

    Master-uppsats, Lunds universitet/Synkrotronljusfysik; Lunds universitet/Fysiska institutionen

    Författare :Harald Wallander; [2019]
    Nyckelord :CO oxidation; platinum; iron oxides; Physics and Astronomy;

    Sammanfattning : Studying catalysts under such non-equilibrium conditions is a step towards approaching more realistic reaction conditions for working catalysts. Reactivity during phase changes of ultra-thin FeO2 films grown on Pt(111) are studied in situ with Ambient Pressure X-ray Photo Emission Spectroscopy and Quadrupole Mass Spectrometry, while running the CO oxidation reaction at 160°C and 0:6 mbar. LÄS MER

  4. 24. Uppvärmning av Almunge brandstation med pyrolys

    Kandidat-uppsats, SLU/Dept. of Energy and Technology

    Författare :Felix Eriksson; Erik Gustafsson; Karl Malmberg; Simon Martelius; Simon Johansson; Patrick Johansson; Michael Stanowski; [2019]
    Nyckelord :biokol; trädgårdsavfall; brandstation; värmeförsörjning; jordförbättringsmedel; pyrolysreaktor;

    Sammanfattning : This project has been carried out on the behalf of Ihus in collaboration with Stuns Energi. The goal was to find and model a solution based on the process of pyrolysis that can deliver enough heat to Almunge fire station while storing maximum amount of CO2 in the form of biochar. LÄS MER

  5. 25. LCA av tomatjuice – en jämförelse av KRAV-märkt och konventionell tomatjuice

    Uppsats för yrkesexamina på grundnivå, SLU/Dept. of Energy and Technology

    Författare :Erika Melin; [2019]
    Nyckelord :LCA; tomatjuice; ekologisk; KRAV; konventionell odling;

    Sammanfattning : Consumers demand organic crops and food that are grown and processed in a sustainable and healthy way. More studies regarding the organic agriculture's environment and climate impact are needed to demonstrate with certainty that such a cultivation system affects the environment less. LÄS MER