Sökning: "reductants"

Visar resultat 1 - 5 av 18 avhandlingar innehållade ordet reductants.

  1. 1. Radiation Induced Oxidative Dissolution of UO2

    Författare :Ella Ekeroth; Mats Jonsson; Bernd Grambow; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; radiation; radiolysis; UO2; spent nuclear fuel; radicals; oxidants; reductants; rate constants; dissolution; H2O2; H2; Nuclear chemistry; Kärnkemi;

    Sammanfattning : Sammanfattning Denna doktorsavhandling berör oxidativ upplösning av UO2 (som modellsubstans för utbränt kärnbränsle) orsakad av radiolys av vatten samt effekten av H2 på denna denna process. Hastighetskonstanter för oxidation av UO2-pulver med olika oxidanter såsom H2O2 har bestämts experimentellt. LÄS MER

  3. 2. Active sites and influence of reaction conditions on the selective catalytic reduction of NOx over the silver-alumina catalyst

    Författare :Linda Ström; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; microemulsion; nanoalloys; DRIFTS; HC-SCR; indium; palladium; silver; XRD; UV-vis; alumina; NH3-TPD.; Lean NOx reduction; TEM; NH3-SCR;

    Sammanfattning : Hazardous nitrogen oxides (NOx) are challenging to remove from fuel-efficient excess-oxygen operating engines. A promising solution is selective catalytic reduction (SCR) of NOx, using hydrocarbons (HC-SCR) or ammonia (NH3-SCR) as reducing agent. LÄS MER

  4. 3. Glutaredoxins : structure, function and mechanism

    Författare :Fredrik Åslund; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :;

    Sammanfattning : Thioredoxin (Trx) and glutaredoxin (Grx) are small (9-12 kDa) intracellular disulfide reducing enzymes. They were originally described as hydrogen donors for ribonucleotide reductase (RR), the enzyme that catalyzes the conversion of ribonucleotides to deoxyribonucleotides. LÄS MER

  5. 4. Biochemical properties of human glutaredoxins

    Författare :Catrine Johansson; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :;

    Sammanfattning : Glutaredoxins (Grxs) are highly conserved thiol-disulfide oxidoreductases that utilize electrons from the tripeptide glutathione (GSH) to catalyze thiol-disulfide exchange reactions. Bacteria, yeast and plants contain multiple dithiol Grxs, which are involved in different cellular processes like DNA synthesis, defense against oxidative stress, apoptosis, and regulation of transcription factor binding activity. LÄS MER

  7. 5. Computational Fluid Dynamics and Experimental Studies of the Urea-SCR System

    Författare :Andreas Lundström; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; urea; SCR; decomposition; CYA; HNCO; NH3; CFD; thermolysis;

    Sammanfattning : Volatile emissions produced by the burning of fossil fuels may be converted on a catalyst to less harmful products. During lean combustion an excess of oxygen in the exhaust gases together with a catalyst effectively oxidizes carbon monoxide and hydrocarbons into carbon dioxide and water. LÄS MER