Sökning: "PXRD"

Visar resultat 1 - 5 av 13 avhandlingar innehållade ordet PXRD.

  1. 1. Structure and dynamics of complex materials in the water-poor regime

    Författare :Sanna Gustavsson; Fysikalisk kemi; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Hydration; cellulose; dissolution; sugar surfactant; hydrated crystals; structure; dynamics; phase diagram; fuel cell; pulsed-field-gradient PFG spin-echo NMR; Polarization Transfer solid state NMR; PXRD; GVS; TGA; amphiphilic;

    Sammanfattning : In the solid state, molecules are normally ordered in a specific structure. With time, and as a result of influence from the surroundings, solid materials can change their molecular and/or crystal structure and, as a consequence, obtain completely different properties. Water is particularly important in this respect. LÄS MER

  3. 2. Bimetallic Palladium Catalysts for Methane Combustion in Gas Turbines

    Författare :Katarina Persson; Sven Järås; Jon McCarty; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; activity; bimetal; catalytic combustion; DRIFTS; EDS; gas turbine; methane; morphology; palladium; platinum; pressure; PXRD; stability; TEM; TPO; XPS; Chemical engineering; Kemiteknik;

    Sammanfattning : Catalytic combustion is a promising combustion technology for gas turbines, which results in ultra low emission levels of nitrogen oxides (NOx), carbon monoxide (CO) and unburned hydrocarbons (UHC). Due to the low temperature achieved in catalytic combustion almost no thermal NOx is formed. LÄS MER

  4. 3. Characterization of crystalline materials by rotation electron diffraction : Phase identification and structure determination

    Författare :Yifeng Yun; Xiaodong Zou; Christian W. Lehmann; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; electron microscopy; phase identification; rotation electron diffraction; structure determination; three-dimensional electron diffraction; Inorganic Chemistry; oorganisk kemi;

    Sammanfattning : Electron crystallography is powerful for determination of complex structures. The newly-developed 3D electron diffraction (ED) methods make structure determination from nano- and micron-sized crystals much easier than using other methods, for example X-ray diffraction. LÄS MER

  5. 4. Processing and performance of zeolites for efficient carbon dioxide separation

    Författare :Arto Ojuva; Lennart Bergström; Viveka Alfredsson; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Materials Chemistry; materialkemi;

    Sammanfattning : We have structured zeolites from powders of zeolite 13X and 4A into hierarchically porous monoliths for efficient carbon dioxide capture by tailoring the pore dimensions to facilitate rapid gas uptake and release. Freeze-casting was used for the first time to shape adsorbents into a lamellar structure. LÄS MER

  7. 5. Open-framework Structures Built by Inorganic Clusters : Synthesis and Characterization

    Författare :Hong Chen; Junliang Sun; Xiaodong Zou; Thomas E Albrecht-Schmitt; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Open-framework; germanates; vanadoborates; aluminoborates; germanosilicates; crystal structure; hydrothermal synthesis; crystal X-ray diffraction; rotation electron diffraction; powder X-ray diffraction; Inorganic Chemistry; oorganisk kemi;

    Sammanfattning : Novel open-framework germanates and vanadoborates, which are constructed from typical types of clusters, have been synthesized based on different strategies. The crystal structures are solved by using single crystal X-ray diffraction (SXRD) technique or by combined techniques. LÄS MER