Sökning: "methane output"

Visar resultat 6 - 10 av 21 uppsatser innehållade orden methane output.

  1. 6. System concept for small-scale biological methanation using electrolysis and trickle bed reactor : with the aim of upgrading biogas to vehicle fuel quality

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

    Författare :Gustav Larsson; [2021]
    Nyckelord :biological methanation; biogas upgrade; methane; small-scale methanation;

    Sammanfattning : In the present study, the concept of a biological H2 methanation (BHM) system was created for four cases of scale which are determined by electrolyser scale. The system design is aimed to upgrade existing biogas to vehicle fuel quality, with a concentration of CH4 above 95% and H2S removal. The cases of scale and type of electrolyser are: 4. LÄS MER

  3. 7. Small-scale biogas : A techno-economic comparison of Internal Combustion Engines, Micro Gas Turbines and Stirling Engines

    Master-uppsats, KTH/Skolan för industriell teknik och management (ITM)

    Författare :Emil Sund; [2020]
    Nyckelord :;

    Sammanfattning : Gas driven power generation is expected to increase in the near future due to significantly lesser environmental impact than oppose to conventional fuels like coal and oil. Today, Natural Gas (NG) is the dominant product on the market and biogas, which originates from degradable organic waste, has not reached its full market potential due to bottlenecks in utilization. LÄS MER

  4. 8. Power to X: En fallstudie med avseende på lönsamheten i Sverige

    Uppsats för yrkesexamina på avancerad nivå, Uppsala universitet/Elektricitetslära

    Författare :Madelene Wahlund; Alfred Atterby; [2020]
    Nyckelord :Power to X; Power to Gas; Power to Gas to Power; Elektrolysör; Vätgas; Metan;

    Sammanfattning : Power to X, hereinafter PtX, is a conversion of electricity into some kind of energy carrier, such as gas or liquid. The purpose of the technique is often to store “excess” energy from renewable energy sources, usually wind power, in order to use it later. LÄS MER

  5. 9. Methane flux in the Doñana wetlands : Waterbird guano addition and benthicinvertebrate effects

    Magister-uppsats,

    Författare :Noa Ratia; [2019]
    Nyckelord :aquatic invertebrates; bottom-up effects; CH4; Doñana; greenhouse gases; mesocosm; methane; sediment cores; akvatiska evertebrater; bottom-up effekter; CH4; Doñana; mesokosm; metan; sedimentkärnor; växthusgaser;

    Sammanfattning : Wetlands are globally important biogeochemical hotspots, and their roles as either significant sources of greenhouse gas or carbon sinks are strongly controlled by environmental drivers such as carbon, nitrogen, and phosphorus availability, which can stimulate emission of three greenhouse gases: nitrous oxide (N2O), carbon dioxide (CO2) and methane (CH4). Mounting evidence suggests that aquatic invertebrate activity can enhance wetland greenhouse gas flux, through bioturbation and bioirrigation of surrounding sediments. LÄS MER

  7. 10. Effects of extruded linseed on methane emission and milk production of dairy cows

    Master-uppsats, SLU/Dept. of Animal Nutrition and Management

    Författare :Stina Blomdahl; [2019]
    Nyckelord :extruded linseed; methane output; fatty acid; milk yield;

    Sammanfattning : The agriculture sector is one of the major sources to produce greenhouse gases of today. One big contributor is methane (CH4) generated during rumen digestion of the feed carbohydrates. One approach to lower CH4 output from the agriculture sector, is to change the diet for the cows. LÄS MER