Search for dissertations about: "electrolysis hydrogen"

Showing result 1 - 5 of 29 swedish dissertations containing the words electrolysis hydrogen.

  1. 1. Hydrogen, an Energy Carrier of the Future

    Author : Christian Hulteberg; Avdelningen för kemiteknik; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Chemical technology and engineering; Catalysts; Aerosols; Gasification; Hydrogen; Systems; Kemiteknik och kemisk teknologi;

    Abstract : The climate is changing, something that many scientists correlate to increased emissions of greenhouse gases. The effluent that is considered to have the highest impact on global warming is carbon dioxide, when effect and quantity are taken into account. READ MORE

  2. 2. In-situ activated hydrogen evolution from pH-neutral electrolytes

    Author : John Gustavsson; Ann Cornell; Olof Forsén; KTH; []
    Keywords : molybdate; trivalent cations; electrolysis; hypochlorite reduction; films; electrolysis; chlorate process; molybdat; trivalenta katjoner; elektrolys; hypokloritreduktion; filmer; kloratprocessen; SRA - Energy; SRA - Energi;

    Abstract : The goal of this work was to better understand how molybdate and trivalent cations can be used as additives to pH neutral electrolytes to activate the Hydrogen Evolution Reaction (HER). Special emphasis was laid on the chlorate process and therefore also to some of the other effects that the additives may have in that particular process. READ MORE

  3. 3. Electrocatalysts for sustainable hydrogen energy : disordered and heterogeneous nanomaterials

    Author : Joakim Ekspong; Thomas Wågberg; Ludvig Edman; Tomas Edvinsson; Umeå universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Water splitting; Electrochemistry; Nanomaterials; Density functional theory; Hydrogen evolution; MoS2; Fuel cell; nanomaterials; nanomaterial; fysik; Physics; Physical Chemistry; fysikalisk kemi;

    Abstract : With the current global greenhouse gas emissions, our remaining carbon budget is depleted in only 7 years. After that, several biophysical systems are predicted to collapse such as the arctic ice, coral reefs and the permafrost, leading to potentially irreversible consequences. READ MORE

  4. 4. Water splitting by heterogeneous catalysis

    Author : Henrik Svengren; Mats Johnsson; Tomas Edvinsson; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Faradaic efficiency; electrocatalysis; electrolysis; water oxidation; hydrogen reduction; H2; O2; mass spectrometry; Inorganic Chemistry; oorganisk kemi;

    Abstract : A sustainable solution for meeting the energy demands at our planet is by utilizing wind-, solar-, wave-, thermal-, biomass- and hydroelectric power. These renewable and CO2 emission-free energy sources are highly variable in terms of spatial and temporal availability over the Earth, introducing the need for an appropriate method of storing and carrying energy. READ MORE

  5. 5. Non-geological hydrogen storage for fossil-free steelmaking

    Author : Joakim Andersson; Stefan Grönkvist; Simon Harvey; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; hydrogen storage; fossil-free; steelmaking; industrial decarbonization; hydrogen direct reduction; Chemical Engineering; Kemiteknik;

    Abstract : In the last half-century, global steel use has increased more than threefold and further growth is expected, particularly in developing economies. However, steelmaking is currently responsible for 7% of the global net carbon dioxide (CO2) emissions, and any substantial further optimization of existing processes that utilize fossil fuels for iron ore reduction is infeasible. READ MORE