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Visar resultat 1 - 5 av 223 avhandlingar som matchar ovanstående sökkriterier.

1. 1. Catalytic combustion of methane

   Författare :Philippe Thevenin; KTH; []
   Nyckelord :catalytic combustion; gas turbine; methane; palladium; alumina; barium; lanthanum; oxidation; preparation; temperature-programmed oxidation TPO ; decomposition; reoxidation; X-ray photoelectron spectroscopy XPS ; metal-support interaction; deactiva;

   Sammanfattning : Catalytic combustion is an environmentally benign technologywhich has recently reached the stage of commercialization.Palladium is the catalyst of choice when considering gasturbines fuelled with natural gas because of its superioractivity for methane oxidation. LÄS MER

3. 2. Mesoporous material systems for catalysis and drug delivery

   Författare :Aylin Atakan; Magnus Odén; Cristina Canal; Petra de Jongh; Linköpings universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

   Sammanfattning : Hybrid material systems possess multi-functional properties which make them intriguing for the materials science community since very early dates. However, it is not straightforward to produce such material systems. A smart and efficient approach is necessary to extract the desired properties of each component under the desired conditions. LÄS MER

4. 3. Structure, Morphology, and Catalytic Properties of CuOx/CeO2 Model Catalysts

   Författare :Björn Skårman; Centrum för analys och syntes; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Synchrotron radiation; High-energy Diffraction; X-ray Absorption Fine Structure Spectroscopy.; Chemical technology and engineering; Kemiteknik och kemisk teknologi; Chemistry; Kemi; Material technology; Materiallära; materialteknik; X-ray photoelectron spectroscopy; Atomic force microscopy; Gatan Image Filter GIF ; Energy-filtered TEM; High-resolution electron microscopy; Inert gas condensation IGC ; rf Magnetron sputtering; Thermal activation; Batch reactor; Carbon monoxide oxidation; Surface sensitivity; Catalytic anisotropy; Growth; Nucleation; Topography; Roughness; Core-shell structures; Morphology; Nanostructured; Nanocomposite; Nanoparticles; Surface structure; Polycrystalline surfaces; Thin films; Copper oxide; Cerium dioxide CeO2 ; Ceria;

   Sammanfattning : Cerium dioxide, or ceria, is a chemically stable oxygen ion conducting material with a capacity to store and release oxygen, and is therefore extensively used in combustion catalysts. The Cu-Ce-O system has been identified as one of the most active catalysts for the combustion of carbon monoxide. LÄS MER

5. 4. Nanomaterials for high-temperature catalytic combustion

   Författare :Erik Elm Svensson; Sven Järås; Magali Boutonnet; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; catalytic combustion; microemulsion; hexaaluminate; magnesia; perovskite; ceria; methane; gas turbine; katalytisk förbränning; mikroemulsion; hexaaluminat; magnesia; perovskit; ceriumdioxid; metan; gasturbin; Catalysis; Katalys;

   Sammanfattning : Katalytisk förbränning är en lovande teknik för användning vid kraftgenerering, särskilt för gasturbiner. Genom att använda katalytisk förbränning kan man nå mycket låga emissioner av kväveoxider (NOX), kolmonoxid (CO) och oförbrända kolväten (UHC) samtidigt, vilket är svårt vid konventionell förbränning. LÄS MER

7. 5. Porous Cerium Dioxide for Catalytic Applications

   Författare :Mats Lundberg; Centrum för analys och syntes; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; materialteknik; Chemical technology and engineering; Kemiteknik och kemisk teknologi; Materiallära; Material technology; catalysis; transmission electron microscopy; macroporous; mesoporous; cerium dioxide; zirconium dioxide;

   Sammanfattning : Mesoporous cerium dioxide with high crystallinity has been synthesized and studied by TEM, SEM, nitrogen adsorption, PXRD, AFM, and SAXS. The catalytic properties of the materials have been investigated The results of the catalysis experiments were correlated with high resolution TEM investigations of the corresponding material, and it was found that the exposed crystallographic facets play an important role in the conversion of carbon monoxide to carbon dioxide. LÄS MER