Sökning: "Gas porosity"

Visar resultat 16 - 20 av 81 avhandlingar innehållade orden Gas porosity.

  1. 16. Optimization of structured adsorbents for gas separation processes

    Författare :Fateme Rezaei; Alirio Rodrigues; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Chemical Technology; Kemisk teknologi;

    Sammanfattning : Conventional gas separation processes using packed beds of beads or granules suffer from high pressure drop and mass transfer resistance when higher throughputs are required, leading to lower productivity and recovery and higher power consumption. This restricts their application to low throughputs and makes them less attractive compared to other processes for large volume production and high productivity. LÄS MER

  3. 17. Laser Spectroscopy in Scattering Media for Biological and Medical Applications

    Författare :Linda Persson; Atomfysik; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Instrumentation technology; Mät- och instrumenteringsteknik; Atom- och molekylärfysik; Atomic and molecular physics; Fysik; Physics; Monte Carlo simulations; Biomedical Optics; Scattering media; Gas measurements; Near infrared spectroscopy; Diode laser spectroscopy; Absorption spectroscopy;

    Sammanfattning : Tunable diode laser absorption spectroscopy can be utilised for gas detection in biological and medical applications. The common approach is to analyse transmitted light according to the Beer-Lambertian law. LÄS MER

  4. 18. Fluid Dynamics of the Bottom Bed of Circulating Fluidized Bed Boilers

    Författare :Anders Svensson; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; fluidized beds; circulating fluidized bed boilers; fluctuations; fluidization regimes; bottom bed; bed porosity; fluid dynamics; bubbling beds; circulating fluidized beds; non-slugging; bed expansion; particle concentration;

    Sammanfattning : The fluid dynamic conditions in the furnace of a fluidized bed boiler influence the combustion and the production of harmful emissions. A substantial amount of the bed material in a circulating fluidized bed (CFB) boiler is present as a dense bubbling bottom bed. LÄS MER

  5. 19. Dynamics of wood particle pyrolysis applied to gas-solids fluidisation

    Författare :Ulf Sand; Rebei Bel Fdhila; Lucien Masbernat; Mälardalens högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Environmental engineering; Miljöteknik; Energi- och miljöteknik;

    Sammanfattning : Avhandlingen behandlar matematiska modellerings- och simuleringsaspekter samt resultat rörande pyrolys av stora och små träpartiklar. Avhandlingsarbetet är inriktat på två specifika processer. Den ena är pyrolys av enstaka träpartiklar och den andra är pyrolys av fluidiserade träpartiklar. LÄS MER

  7. 20. Synthesis and Characterisation of Carbide Derived Carbons

    Författare :Sigita Urbonaite; Gunnar Svensson; Mats Johnsson; Rik Brydson; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Carbide derived carbons; Gas adsorption; EELS; Raman; Porous carbons; Chemistry; Kemi; strukturkemi; Structural Chemistry;

    Sammanfattning : Carbide derived carbons (CDCs) have been synthesised through chlorination of VC, TiC, WC, TaC, NbC, HfC and ZrC at different temperatures. The aim of the investigation was to systematically study changes of structural and adsorption properties depending on the synthesis conditions. LÄS MER