Search for dissertations about: "Environmental catalysis"
Showing result 21 - 25 of 58 swedish dissertations containing the words Environmental catalysis.
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21. Immobilizing catalysts on textiles : case of zerovalent iron and glucose oxidase enzyme
Abstract : Catalytic systems are one of the most effective technologies of modern chemical processes. The system uses a molecule called ‘catalyst’ that is capable of catalyzing a reaction without being produced or consumed during the process. READ MORE
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22. Fundamental Studies of Catalytic NOx Removal - Micro Kinetic Modelling, Monte Carlo Simulations and Flow Reactor Experiments
Abstract : It is essential to decrease the CO2 emissions from vehicles, since CO2 is a greenhouse gas. One way to improve fuel economy and decrease CO2 emissions, is to run the engine with oxygen excess, so-called lean-burn operation. However, a major problem here is the reduction of the NOx in a lean atmosphere. READ MORE
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23. Spectroscopic characterisation of surface hydroxyls during catalytic methane oxidation
Abstract : Implementation of methane rich fuels as to develop sustainable vehicle transports requires improved catalytic exhaust aftertreatment technologies to convert engine-out methane emissions to carbon dioxide and water by total oxidation. A main challenge is that water formed during combustion inhibits the methane oxidation reaction even over the most active palladium-based catalysts presently known. READ MORE
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24. 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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25. New Materials for Environmental Applications:Thermoelectrics and Low-Temperature Oxidation Catalysts
Abstract : New materials have been researched for environmental applications as thermoelectrics and low-temperature oxidation catalysts. One of the main objectives of this thesis was to prepare and characterize new efficient thermoelectric materials (TM’s). READ MORE