Sökning: "reactors"

Visar resultat 6 - 10 av 362 avhandlingar innehållade ordet reactors.

  1. 6. Mathematical Modelling of Structured Reactors with Emphasis on Catalytic Combustion Reactions

    Författare :Dennis Papadias; KTH; []
    Nyckelord :Mathematical modelling; Structured reactors; Catalytic combustion; Monolith; Annular reactor; Washcoat; Mass-transfer; Kinetics;

    Sammanfattning : .... LÄS MER

  3. 7. Thorium fuels for light water reactors - steps towards commercialization

    Författare :Klara L Insulander Björk; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Halden research reactor; light water reactors; fuel performance; plutonium; Thorium; neutronic simulations;

    Sammanfattning : Thorium-containing nuclear fuel is proposed as a means of gaining a number of benefits in the operation of light water reactors, some related to the nuclear properties of thorium and some related to the material properties of thorium dioxide. This thesis aims to investigate some of these benefits and to widen the knowledge base on thorium fuel behaviour, in order to pave the way for its commercial use. LÄS MER

  4. 8. On Modeling the Dynamics of Fixed Biofilm Reactors. With focus on nitrifying trickling filters

    Författare :Torsten Wik; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; operation; transfer functions; biofilm reactors; adsorption; dormancy; modeling; dynamics; nitrification;

    Sammanfattning : Fixed biofilms, which are matrix-enclosed populations of organisms attached to solid surfaces, are increasingly used in environmental biotechnology processes, such as the treatment of potable water and wastewater. This thesis aims to give some insight into the dynamic modeling of biofilms and fixed biofilm reactors, with a focus on nitrifying trickling filters (NTFs) for the treatment of wastewater. LÄS MER

  5. 9. Monolith Reactors in Three-Phase Processes

    Författare :Rolf Edvinsson; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; desulfurization; methanol synthesis; acetylene hydrogenation; Taylor flow; monolith reactor; three-phase; computational fluid dynamics;

    Sammanfattning : The use of monoliths in chemical processes has been studied with the emphasis on liquid-phase hydrogenations. A monolithic catalyst consists of many narrow, parallel channels with catalytically active species either incorporated into the wall itself or into a layer of a porous oxide deposited on the wall (a washcoat). LÄS MER

  7. 10. Advanced fuels for thermal spectrum reactors

    Författare :Jitka Zakova; Janne Wallenius; Jan-Leen Kloosterman; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; BWR; transmutation; thorium; Pu; MA; Am; Cm; AHTR; thermal; reactor; neutron;

    Sammanfattning : The advanced fuels investigated in this thesis comprise fuels non− conventional in their design/form (TRISO), their composition (high content of plutonium and minor actinides) or their use in a reactor type, in which they have not been used before (e.g. nitride fuel in BWR). LÄS MER