Search for dissertations about: "γ-Al2O3"
Showing result 1 - 5 of 20 swedish dissertations containing the word γ-Al2O3.
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1. Microstructure of Alumina (Al2O3) Grown by Oxidation of FeCrAl Alloys and by Chemical Vapour Deposition
Abstract : This thesis consists of two parts: the detailed microstructure of (i) CVD alumina multilayer coatings, and (ii) alumina scales formed on three different FeCrAl alloys. The coatings and oxide scales were characterized by using analytical electron microscopy and different surface analysis techniques. READ MORE
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2. Spectroscopic investigation of palladium catalysts during wet methane oxidation
Abstract : Abatement of the strong greenhouse gas methane in vehicle applications by use of catalytic end-of-pipe technologies is challenging due to the prevailing reaction conditions with low temperatures and high water content. In this thesis, the mechanisms behind low-temperature water inhibition of lean methane oxidation over palladium-based catalysts have been studied using an integrated experimental approach including wet-chemical preparation of model catalysts with systematic variation of key performance parameters, transient measurements of reaction kinetics in chemical flow reactor, and operando infrared and X-ray absorption spectroscopic characterisation. READ MORE
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3. Is water a crucial factor in the oxidation of FeCrAl alloys?
Abstract : FeCrAl alloys are much used at high temperatures because the formation of a dense and slow-growing alumina scale provides resistance towards oxidation and high temperature corrosion. While the FeCrAl alloys are primarily intended for temperatures above 950ºC, they are sometimes used at lower temperature, for example as supports in automotive catalysts. READ MORE
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4. Studies of the Selective Catalytic Reduction of Nitrogen Oxides with Dimethyl Ether
Abstract : Dimethyl ether (DME) is one of the most energy-efficient and low CO2 emitting alternative fuels when produced from biomass. Similar to other vehicles with combustion engines, vehicles running on DME will most likely need after-treatment technologies for the reduction of NOx emissions to meet the most stringent upcoming legislations. READ MORE
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5. Low-Temperature Oxidation of CO and Volatile Organic Compounds over Supported Platinum Catalysts
Abstract : The catalytic oxidation of carbon monoxide (CO) and volatile organic compounds (VOC) is important for the reduction of harmful emissions from both vehicles and from stationary sources. Both these applications suffer from poor catalytic efficiency at lower temperatures. READ MORE
