Sökning: "Zeolites"

Visar resultat 1 - 5 av 88 avhandlingar innehållade ordet Zeolites.

  1. 1. Colloidal zeolites : from nucleation to zoned films by seeded growth

    Författare :Qinghua Li; Luleå tekniska universitet; []
    Nyckelord :ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Chemical Technology; Kemisk teknologi;

    Sammanfattning : The work presented in this thesis concerns the investigation of nucleation kinetics for colloidal zeolites, especially the determination of the nucleation period during crystallization. It also concerns the use of colloidal TPA-silicalite-1 for the preparation of zoned MFI films. LÄS MER

  2. 2. Structure Determination and Prediction of Zeolites : A Combined Study by Electron Diffraction, Powder X-Ray Diffraction and Database Mining

    Författare :Peng Guo; Xiaodong Zou; Christine Kirschhock; Stockholms universitet; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; zeolites; rotation electron diffraction; structure determination; structure prediction; strong reflections approach; oorganisk kemi; Inorganic Chemistry;

    Sammanfattning : Zeolites are crystalline microporous aluminosilicates with well-defined cavities or channels of molecular dimensions. They are widely used for applications such as gas adsorption, gas storage, ion exchange and catalysis. The size of the pore opening allows zeolites to be categorized into small, medium, large and extra-large pore zeolites. LÄS MER

  3. 3. Narrow-pore zeolites and zeolite-like adsorbents for CO2 separation

    Författare :Ocean Cheung; Niklas Hedin; Paul A. Wright; Stockholms universitet; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; CO2 separation; zeolites; phosphates; titanium silicates; ion exchange; flue gas CO2 capture; biogas upgrading; materialkemi; Materials Chemistry;

    Sammanfattning : A range of porous solid adsorbents were synthesised and their ability to separate and capture carbon dioxide (CO2) from gas mixtures was examined. CO2 separation from flue gas – a type of exhaust gas from fossil fuel combustion that consists of CO2 mixed with mainly nitrogen and biogas (consists of CO2 mixed with mainly methane) were explicitly considered. LÄS MER

  4. 4. Structural study of zeolites utilizing novel electron crystallographic methods : A voyage into the world of zeolite structures

    Författare :Tom Willhammar; Xiaodong Zou; Raul Lobo; Stockholms universitet; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; Electron crystallography; zeolites; structure determination; disorder; electron microscopy; strukturkemi; Structural Chemistry;

    Sammanfattning : Electron crystallography has evolved as a powerful method for structural characterization of a wide range of materials. It has two significant advantages over other methods for structure determination, e.g. X-ray diffraction. LÄS MER

  5. 5. A journey towards complete structure determination of zeolites by electron crystallography methods

    Författare :Elina Kapaca; Xiaodong Zou; Philippe Boullay; Stockholms universitet; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; Electron crystallography; Zeolites; Structure determination; Rotation electron diffraction; Continuous rotation electron diffraction; Disorder; oorganisk kemi; Inorganic Chemistry;

    Sammanfattning : Electron crystallography has recently become very successful for structural studies of materials with sub-micrometer sized crystals. In this thesis two major techniques have been applied for structure elucidation – 3-dimensional electron diffraction (3D ED) and high-resolution transmission electron microscopy (HRTEM) imaging. LÄS MER