32 uppsatser · sida 1 av 3
Klarläggande av framtida hållbarhet
… to new kinds of fuels to replace fossil fuels. A fuel that could be applied is hydrogen. When hydrogen is combusted only water vapor occurs. Hydrogen is known to be explosive and flammable. These properties are both good and bad for combustion. The purpose of this study is to …
… forward while making motor sports carbon-neutral is to run the race cars on hydrogen. In this thesis, the goal is to convert a spark ignition engine for hydrogen operation. The basis for the hydrogen conversion is the current situation analysis, which raises questions about …
En teknoekonomisk well-to-wheel analys av vätgas som fordonsbränsle
… fuel cell option is the Proton Exchange Membrane Fuel Cell, which uses hydrogen as fuel. The report is focusing on a techno-economic well-to-wheel analysis of hydrogen and the energy balance and costs in a system perspective. The basis for this analysis consists of two …
en studie av befintliga samt potentiella metoder för lagring av förnybar el pa? ett ha?llbart sa?tt
… storage (CAES), flywheels, batteries, super magnetic energy storage (SMES) and hydrogen energy storage. The opportunities for further development are limited for PHES and CAES in comparison with the other technologies. Lithium-ion batteries and hydrogen energy storage are …
en studie utförd vid Hovgårdens avfallsanläggning i Uppsala
… oxidation using oxidants. The oxidants investigated are Fenton's reagent, hydrogen peroxide, Oxypro, potassium permanganate and potassium persulfate. The study was made on untreated leachate and leachate that has been treated in an aerated dam followed by sedimentation dams …
Kartläggning av inkommande avloppsvatten och optimering av driftparametrar
… nor in the multivariate data analysis. Bleaching of the paper pulp, with hydrogen peroxide and lye, results in a subsequent increase in COD concentration in the wastewater. The study shows an increased COD in the water approximately 12 hours after the increased dosing of these …
Ny energi för Försvarsmakten?
… Armed Forces. The question to be answered in this paper is as follows: Can hydrogen gas and fuel cells be used as an alternative source of energy within the Swedish Armed Forces? This paper is based on theoretical studies and reports from prior research done on fuel cells. By …
… effect and the influence on wound healing by topical treatment with 1 % hydrogen peroxide cream in fresh skin wounds on horses. Vaseline is a common substance used as placebo in clinical trials, but few have studied its effect on secondary wound healing in horsesThe horses in …
… One of these new ways to power an aircraft is using fuel cells powered using hydrogen and oxygen, thus producing nothing but water vapour and small amounts of nitrogen dioxide as well as trace amounts of other emissions. Both Boeing (1) and Politecnico di Torino (2) have shown …
… starved cells) which protects DNA. In the heterocysts the nitrogenase produces hydrogen as a side product. The hypothesis is that Dps is cell specific. In order to study this protein, a fusion of the promotor of Dps and GFP (Green Flourescent Protein) was constructed. To detect …
en kvantitativ analys
… amount of cations and thereby a decreasing ability to resist a supply of hydrogen ions to the soil. Acidification has gradually increased in the O horizon in Västerbotten over a 30-year period from the 1970th to the 1990th. The aim of this study was from inventories of The …
… and UV- lamps. The plastic forcing trays have to be cleaned by using Hydrogen Peroxide (H2O2). Tulips which are forced in water have a shorter cooling period compared with the other category which needs more cooling space. Pre-cooled bulbs can be bought to save further more …
… a combustion chamber. However, gas en-gines require biogas purification from hydrogen sulphide and drying from water to avoid cor-rosion. In order to increase the calorific value, carbon dioxide is separated and the Swedish Standard Type A requires the methane content to be 97 % …
At Rottneros pulp mill mechanical pulp is bleached with hydrogen peroxide. The changes of bleaching chemicals that are used for different grades are taken from bleaching tables; however these tables are old and need to be updated. The purpose of this thesis was to be the basis …
… boiler is used. Urea is an organic compound of carbon, nitrogen, oxygen and hydrogen. When urea reacts with nitrogen oxides they transform into harmless nitrogen gas and water. In the plant the urea is injected by six lances. The control of the urea injection at FTG could be …
