Search for dissertations about: "sol-gel"

Showing result 1 - 5 of 50 swedish dissertations containing the word sol-gel.

  1. 1. Nitride fuel production by the internal sol gel process

    Author : Marcus Hedberg; [2014]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; nitride fuels; ZrN; internal sol gel;

    Abstract : AbstractDuring operation of a fourth generation reactor system it is necessarily not desirable to utilize an oxide fuel matrix as in light water reactor systems. One type of chemical compounds that has been suggested is nitride based nuclear fuel. READ MORE

  2. 2. Sol-gel Synthesis and Photocatalytic Characterization of Immobilized TiO2 Films

    University dissertation from Stockholm : KTH

    Author : Haidong Liao; Mats Jonsson; David Stenman; [2009]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Photocatalysis; Hydroxyl radical; TiO2 film; Sol-gel; NATURAL SCIENCES Chemistry; NATURVETENSKAP Kemi; TECHNOLOGY Chemical engineering Chemical process and manufacturing engineering Catalysis; TEKNIKVETENSKAP Kemiteknik Kemisk process- och produktionsteknik Katalys;

    Abstract :    Contamination of surface and ground water from industrial wastes and anthropogenic activities represents one of the greatest challenges to the sustainable development of human society. Heterogeneous photocatalysis, a kind of advanced oxidation process characterized by the production of highly oxidative hydroxyl radicals, is a relatively novel subject with tremendous potential in water treatment applications. READ MORE

  3. 3. Silver Alumina Catalysts for Lean NOx Reduction - Influence of Preparation Methods and Type of Reductant, with Transient Kinetic Modelling

    University dissertation from Stockholm : KTH

    Author : Hannes Kannisto; [2008]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; silver; kinetic modelling; Lean NOx reduction; sol-gel; preparation method; dispersion; cluster; HC-SCR; freeze-dry; XPS; alumina;

    Abstract : The objective of this work was to compare three different preparation methods for silver alumina catalysts for lean NOx reduction. Characteristics such as catalytic activity with propene and n-octane as reductants, chemical state of the silver and silver dispersion were analyzed. READ MORE

  4. 4. Towards more selective sorbents for extraction of drugs and biomarkers from biological fluids using molecularly imprinted polymers

    University dissertation from Stockholm : Department of Analytical Chemistry, Stockholm University

    Author : Mohammad Mahdi Moein; Mohamed Abdel-Rehim; Milton L. Lee; [2014]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; molecularly imprinted polymer; sol-gel; solid phase extraction; microextraction by packed sorbent; monolithic column; Analytical Chemistry; analytisk kemi;

    Abstract : Sample preparation has a critical role as a first step in analytical processes, especially in bioanalysis and environmental analysis. A good sample preparation technique should be robust and stable, regardless of the sample matrix. READ MORE

  5. 5. Lean NOx reduction over silver-alumina catalysts - Aspects on synthesis, structure and activity

    University dissertation from Stockholm : Department of Analytical Chemistry, Stockholm University

    Author : Hannes Kannisto; [2010]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; freeze-drying; HC-SCR; DRIFTS.; aromatic hydrocarbons; silver-alumina; Lean NOx reduction; selective catalytic reduction; sol-gel; characterization; catalyst preparation; kinetic modeling;

    Abstract : The aim of this thesis is to increase the understanding of how to design highly active silver-alumina catalysts for selective catalytic reduction of NOx with hydrocarbons (HC-SCR) in oxygen excess at low temperatures (150-250 °C). Silver-alumina catalysts have been prepared using different methods, including a new unique preparation method developed during the thesis project. READ MORE