Sökning: "solar hydrogen"

Visar resultat 11 - 15 av 106 avhandlingar innehållade orden solar hydrogen.

  1. 11. Hydrogen in the European energy system - The cost dynamics and the value of time-shifting electricity generation

    Författare :Simon Öberg; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; cost; energy systems modeling; Hydrogen; gas turbine; system dynamics; time-shifting;

    Sammanfattning : If the European Union is to become climate-neutral by Year 2050, as envisioned in the European Green Deal, the European energy system must undergo an unprecedented transformation towards eliminating its carbon emissions. For this transition, renewable electricity plays a central role, not only in replacing the current fossil-based electricity generation, but also in promoting the electrification of other sectors, such as transport and industry, sectors which are currently based on fossil fuels. LÄS MER

  3. 12. Thermochemical model studies of some high temperature solar energy conversion processes

    Författare :Mats Lundberg; Umeå universitet; []
    Nyckelord :solar energy conversion; cyclic processes; water splitting; hydrogen production; carbothermal reduction; Co-Fe-0 system; phase relations; solid state emf measurements;

    Sammanfattning : This thesis is a summary and discussion of five papers, mainly dealing with processes where solar thermal energy is utilized in the production of chemicals with high energy contents. The products considered in the present work are H2, Al, and Mg. LÄS MER

  4. 13. Organic electronic materials for hydrogen peroxide production

    Författare :Maciej Gryszel; Eric Glowacki; Magnus Jonsson; Erin Ratcliff; Linköpings universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; hydrogen peroxide; catalysis; organic materials; electronics;

    Sammanfattning : Hydrogen peroxide (H2O2) is an important oxidant, used in various fields of industry, such as paper manufacturing, production of polymers, detergents, and cosmetics. Considering that the molecule degrades only to H2O and O2, it is regarded as a green chemical. LÄS MER

  5. 14. New Catalytic Systems for Light-driven Hydrogen Evolution

    Författare :Chuanshuai Li; Kemisk fysik; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; photocatalysis; hydrogen evolution; semiconductor; molecular catalyst; charge transfer; mechanism;

    Sammanfattning : Solar-driven reduction of water to produce hydrogen is one of the most promising ways to develop sustainable cleanenergy for the future. The challenge in photocatalytic hydrogen evolution research is to design inexpensive catalystsand construct efficient hydrogen production systems. LÄS MER

  7. 15. Recycling of selenium from CIGS solar cell materials

    Författare :Anna Gustafsson; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; CIGS; Recycling; Thin film; Photovoltaic; Solar cells;

    Sammanfattning : Today the importance of solar cells as a power source is growing due to the environmental advantages compared to fossil fuels. One of the most promising new solar cell materials, resulting in high efficiency solar cells, is copper indium gallium selenide (CIGS). LÄS MER