Sökning: "solubility parameters"
Visar resultat 16 - 20 av 90 avhandlingar innehållade orden solubility parameters.
16. Solubility of HFC Refrigerants in Long-Chained Hydrocarbons and Pentaerythritol Esters Measurements and Development of Predictive Models
Sammanfattning : Restrictions for environmental reasons on the use of CFCs and HCFCs, the traditional working fluids in heat pumps, refrigeration plants and air conditioning, have led to the use of pure HFCs and blends of HFCs. However, since HFCs have a different influence on compressor oils, new oils that are compatible with HFCs need to be found. LÄS MER
17. Influence of hydrochemical parameters on the mobility and redistribution of metals from a mine waste deposit
Sammanfattning : The aim of the research presented in this thesis has been to combine theoretical and empirical methods to describe chemical attenuation of trace metals (i.e. Al, Cd, Cu, Fe, Mn, Pb and Zn) in a polluted watershed. It was possible to elucidate the major mechanisms by using the naturalvariations of chemical composition of the system. LÄS MER
18. Particle Engineering by Spherical Crystallization:Mechanisms and Influence of Process Conditions
Sammanfattning : Spherical agglomerates of benzoic acid crystals have been successfully prepared by drowning-out crystallization in three solvent partial miscible mixtures. Benzoic acid is dissolved in ethanol, bridging liquid is added and this mixture is fed to the agitated crystallizer containing water as the anti-solvent. LÄS MER
19. On the effect of nitrogen, hydrogen and cooling rate on the solidification and pore formation in Fe-base and Al-base alloys
Sammanfattning : Experiments on the production of porous metallic materials were performed on Fe-base and Al-base alloys. The method involves dissolution of gases in the liquid state and solidification at various cooling rates. The alloy compositions were selected to induce solidification of primary particles intended to control the pore distribution. LÄS MER
20. Application of copper corrosion inhibitors in mineral oil : Surface analytical studies and corrosion mitigation evaluations
Sammanfattning : This doctoral thesis explores the copper corrosion inhibiting properties of a number of nitrogen containing hetero-organic compounds in refined mineral oil. Traditional organic corrosion inhibitors, as well as novel and bioorganic compounds have been studied. LÄS MER