Search for dissertations about: "iron catalyst"

Showing result 26 - 30 of 73 swedish dissertations containing the words iron catalyst.

  2. 26. Photocatalysis beyond conventional precious metal complexes

    Author : Rickard Lindroth; Göteborgs universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Heterogenization; Iron photocatalysis;

    Abstract : Precious metals, e.g. Ru and Ir, are expensive, scarce and non-renewable resources. As oppose to many renewable resources, these cannot be deliberately produced wherever one wishes. READ MORE

  4. 27. Studies on Metalloenzymatic Dynamic Kinetic Resolutions and Iron-Catalyzed Reactions of Allenes

    Author : Karl P. J. Gustafson; Jan-Erling Bäckvall; Johannes de Vries; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Racemization; Dynamic Kinetic Resolution; Enzyme Catalysis; XAS; Asymmetric Synthesis; organisk kemi; Organic Chemistry;

    Abstract : The main focus of this thesis lies in the development of new transition metal-catalyzed chemoenzymatic dynamic kinetic resolutions (DKR) of both alcohols and amines. The first part of the thesis deals with the development of new heterogeneous systems for the DKR of amines. READ MORE

  5. 28. Oxidative Dissolution of Spent Fuel and Release of Nuclides from a Copper/Iron Canister : Model Developments and Applications

    Author : Longcheng Liu; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; model; oxidative dissolution; spent fuel; radiolysis; release; mass transport; radionuclide; hydrogen; corrosion; canister; near field; repository; Chemical engineering; Kemiteknik;

    Abstract : Three models have been developed and applied in the performance assessment of a final repository. They are based on accepted theories and experimental results for known and possible mechanisms that may dominate in the oxidative dissolution of spent fuel and the release of nuclides from a canister. READ MORE

  6. 29. Fischer-Tropsch synthesis from bio-syngas models over cobalt and cobalt-iron alumina supported catalysts

    Author : Dewi Tristantini; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Fe:Co-ratio; Cobalt; Bio-syngas; Fe-Co bimetallic; Fischer-Tropsch Synthesis;

    Abstract : Fischer-Tropsch (FT) synthesis is a process in which synthesis gas (syngas), a mixture of H2 and CO, is converted into long chain hydrocarbons mainly over Co- or Fe-based catalysts. The FT synthesis requires an H2/CO molar ratio (usage ratio) of approximately 2.1 above the catalyst surface. If the inlet syngas H2/CO ratio is less than 2. READ MORE

  7. 30. Innovations in nanomaterials for proton exchange membrane fuel cells

    Author : Robin Sandström; Thomas Wågberg; Ludvig Edman; Florian Nitze; Licheng Sun; Umeå universitet; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; Fuel Cells; Membrane Electrode Assembly; Oxygen Reduction Reaction; Platinum alloy catalyst; Nanoparticles; Gas Diffusion Electrode; Proton Exchange Membrane; Materials Science; materialvetenskap; fasta tillståndets fysik; Solid State Physics;

    Abstract : Hydrogen technologies are rapidly receiving increased attention as it offers a renewable energy alternative to the current petroleum-based fuel infrastructure, considering that continued large-scale use of such fossil fuels will lead to disastrous impacts on our environment. The proton exchange membrane fuel cell should play a significant role in a hydrogen economy since it enables convenient and direct conversion of hydrogen into electricity, thus allowing the use of hydrogen in applications particularly suited for the transportation industry. READ MORE