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Literature data for the hydrate temperature depression by mono-ethylene glycol (MEG) show some scattering and no thermodynamic model has been able to match all of the available data found in the open literature. This paper presents hydrate equilibrium data for a mixture of 88.13mol% methane and 11.87mol% propane with MEG added to the water phase in concentrations from 0 to 60wt%. That particular hydrocarbon...
The adsorption of asphaltenes of five different origins from Gulf of Mexico, West Africa, North Sea and Brazil onto inorganic particles (kaolin, CaCO 3 , BaSO 4 , FeS, Fe 3 O 4 , TiO 2 and SiO 2 (hydrophilic and hydrophobic)) has been studied by means of the depletion method by assaying asphaltene concentration by UV–vis spectrophotometry (batch partioning...
Powder diffraction measurements on five unoriented samples of poly(ethylene-co-hexene) were performed in the temperature range 23–200°C using synchrotron X-radiation in combination with an area detector. Melting and recrystallization was found to improve the crystallinity of the samples, resulting in a denser packing along [010] or b for the most crystalline samples. A high content of cohexene (branching)...
Model emulsions stabilized by means of silica nanoparticles have been investigated. The effect of the modification of the particle surface has been monitored using infrared (IR) spectroscopy, contact angle measurements and zeta potential measurements. It is shown how coating of the nanoparticles with asphaltenes and resins will modify the stabilization profile compared to that obtained with no coating...
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