Sökning: "catalytic metal"

Visar resultat 1 - 5 av 331 avhandlingar innehållade orden catalytic metal.

  1. 1. Production and transformation of organic compounds from renewable feedstock : Catalytic approaches

    Författare :Elena Subbotina; Joseph Samec; Pieter Bruijnincx; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Lignin; biomass; lignin-first; catalytic fractionation; flow reactors; dibenzodioxocin; silanes; zeolites; visible light photocatalysis; dearomatization; spirolactones; organisk kemi; Organic Chemistry;

    Sammanfattning : This thesis is focused on the development of strategies for lignocellulosic biomass valorization. The thesis consists of two parts.The first part of the presented work is related to the catalytic fractionation of biomass (lignin-first approach) and the production of monomeric compounds from lignocellulose. LÄS MER

  3. 2. Transition Metal Hydrides : Biomimetic Studies and Catalytic Applications

    Författare :Jesper Ekström; Hans Adolfsson; Jonathan Williams; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; transition metals; catalysis; bioinorganic chemistry; hydrides; Organic chemistry; Organisk kemi; Organic Chemistry; organisk kemi;

    Sammanfattning : In this thesis, studies of the nature of different transition metal-hydride complexes are described. The first part deals with the enantioswitchable behaviour of rhodium complexes derived from amino acids, applied in asymmetric transfer hydrogenation of ketones. LÄS MER

  4. 3. Catalytic Asymmetric Ketone and Alkene Reductions Using Transition Metal Complexes

    Författare :Klas Källström; Pher Andersson; Per Arvidsson; Jonathan Williams; Uppsala universitet; []
    Nyckelord :Organic chemistry; Catalytic; Asymmetric; Reductions; Ketones; Alkenes; Transition metal; Complexes; Organisk kemi;

    Sammanfattning : This thesis contains seven papers dealing with iridium and ruthenium based catalytic asymmetric reductions, either of ketones into chiral alcohols, or olefins into chiral alkanes. The first part of the thesis describes how we have designed and evaluated new bicyclic ligands containing either N,S or N,N chelating atoms. LÄS MER

  5. 4. Catalytic Incineration of CO and VOC Emissions over Supported Metal Oxide Catalysts

    Författare :Per-Olof Larsson; Tillämpad biokemi; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Titania; Ceria; Manganese oxide; Copper oxide; VOC; CO; Ethanol; Ethyl acetate; Metal oxide catalysts; Catalytic combustion; Catalytic incineration; Alumina.; Chemical technology and engineering; Kemiteknik och kemisk teknologi; Fysicumarkivet A:1999:Larsson;

    Sammanfattning : Catalytic incineration is one of the methods to reduce the emissions of CO and VOCs. Low operation temperature and low catalyst cost are essential parameters for catalytic incinerators. Pt/Al2O3 catalysts are frequently used today, but the cheaper metal oxide catalysts can be very competitive if comparable overall activity is obtained. LÄS MER

  7. 5. To metal, or not to metal : Diverse mechanisms of O2-activation and radical storage in the ferritin superfamily

    Författare :Vivek Srinivas; Martin Högbom; Brian Hoffman; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Metalloprotein; di-metal; Oxygen activation; Substrate oxidation; Ribonucleotide reductase; Radical; DOPA; ADE-DOT; X-Ray free-electron laser; soluble Methane monooxygenase; Biochemistry; biokemi;

    Sammanfattning : Proteins in the Ferritin-like superfamily are characterized by a four alpha-helical structural motif. These proteins are distributed across all three kingdoms of life and perform a wide range of functions. LÄS MER