Sökning: "DME"
Visar resultat 6 - 10 av 26 avhandlingar innehållade ordet DME.
6. Development and Application of Laser Techniques for Studying Fuel Dynamics and NO Formation in Engines
Sammanfattning : Development and application of some laser techniques for the study of engine combustion are presented. The investigations mainly cover two aspects: fuel dynamics and formation of NO. LÄS MER
7. Development of Laser-Induced Fluorescence for Precombustion Diagnostics in Spark-Ignition Engines
Sammanfattning : Motivated by a desire to understand and optimize combustion in spark-ignition (SI) engines, laser techniques have been developed for measurement of fuel and residual gas, respectively, in the precombustion mixture of an operating SI engine. The primary objective was to obtain two-dimensional, quantitative data in the vicinity of the spark gap at the time of ignition. LÄS MER
8. Development of Dual-broadband Rotational CARS for Combustion Diagnostics
Sammanfattning : The present thesis concerns development and application of dual-broadband rotational coherent anti-Stokes Raman spectroscopy (DB-RCARS) for temperature and species concentration measurements in combustion processes. Both fundamental development of the technique, including experimental as well as modelling results, and measurements in practical combustion devices were conducted. LÄS MER
9. Studies of hydrocarbon-assisted selective catalytic reduction of nitrogen oxides - DME as reductant and reaction mechanism over silver/alumina
Sammanfattning : Increasing amounts of carbon dioxide are attaining worldwide growing attention as one probable cause for global warming. Together with the expected peak in oil production and an increasing oil demand, this results in a greater interest in more fuel effective lean burn engines (i.e. operation with excess oxygen). LÄS MER
10. NOx reduction with dimethyl ether in lean exhaust
Sammanfattning : There is a growing concern worldwide about the increase in anthropogenic greenhouse gas emissions, particularly carbon dioxide (CO2) from the combustion of fossil fuels. Vehicles with internal combustion engines contribute significantly to these emissions, which has led to an increased demand for engines running on alternative (non-fossil) fuels. LÄS MER