Sökning: "Sulfur poisoning and regeneration"
Visar resultat 1 - 5 av 8 avhandlingar innehållade orden Sulfur poisoning and regeneration.
1. Complete methane oxidation over alumina and zeolite supported palladium for emission control
Sammanfattning : The use of methane-based fuels, such as natural gas and biogas, gives lower emissions of for instance carbon dioxide (CO2) and particulate matters compared to traditionally used liquid fossil fuels. However, the exhaust gases contain significant levels of unburnt methane (CH4) residuals, which are desirable to minimize since CH4 has a high global warming potential. LÄS MER
2. Experimental studies of NOx storage catalysts -Preparation, characterisation, NOx regeneration and sulfur deactivation
Sammanfattning : .... LÄS MER
3. Palladium Catalyzed Methane Oxidation for Emission Control
Sammanfattning : The use of methane based fuels, such as natural gas and biogas, benefits from lower emissions of CO2, CO, NOx, non-methane HC, SOx and particulate matters compared to traditionally used liquid fossil fuels. However, the exhaust gases contain significant levels of unburnt CH4 residuals, which are desirable to minimize since CH4 is a strong greenhouse gas with high global warming potential. LÄS MER
4. Deactivation of SCR catalysts - Impact of sulfur and the use of biofuels
Sammanfattning : In a near future, limits on CO2 emissions from vehicles will be introduced, which requires development of more fuel-efficient engines and most likely a transition towards the use of more biofuels. With the implementation of biofuels several issues could arise, one being the lack of fuel standards for these new type of fuels, leading to higher concentrations of catalyst poisons compared to conventional fossil fuels. LÄS MER
5. Studies of NOx Storage Catalysts - Preparation, Characterization, Sulfur Deactivation and Micro Kinetic Modelling
Sammanfattning : For the protection of the global environment, it is essential to decrease the emissions of CO2 which is a green house gas. Lean-burn and diesel engines offer relatively low CO2 emissions and good fuel economy. LÄS MER