The densities and cloud points of six vegetable oils mixed in variable proportions to diesel oils (commercial vehicle fuels) are measured. Simple correlations are reported between these properties and the fatty acids vegetable oil composition. A simple modelling summarises experimental data informations.
Articles UCP
Cette page présente les résumés des articles publiés par les chercheurs de l’Unité de Chimie et Procédés de l’ENSTA ParisTech depuis 2006 dans le domaine de l’énergie et de l’environnement.
The density and cloud point of diesel oil mixtures with the straight vegetable oils (SVO): palm, cabbage palm, cotton, groundnut, copra and sunflower (2009)
Samedi 30 janvier 2010The viscosity of diesel oil mixtures with straight vegetable oils: palm, cabbage palm, cotton, groundnut, copra and sunflower (2009)
Samedi 30 janvier 2010The feed back experience of using straight vegetable oil (SVO) as a fuel in the existing diesel engines evidences the need for fitting several physical properties, among them the fuel viscosity. An empirical modelling is proposed in order to interpolate viscosity to any kind of diesel oil/SVO blend. This model is fitted on an experimental [...]
Effect of methanol addition on water–CO2–diethanolamine system: Influence on CO2 solubility and on liquid phase speciation (2008)
Samedi 30 janvier 2010The aim of this study is the characterisation of VLE and chemical equilibria for the system CO2/diethanolamine (DEA)/H2O/methanol. The effect of MeOH composition has been studied using four compositions (from 0 to 30wt% of methanol with a fixed composition (30 wt%) of DEA), the measurement being made at T = 298.15K and at various CO2 [...]
DSC measurements and modelling of the kinetics of methane hydrate formation in water-in-oil emulsion (2009)
Samedi 30 janvier 2010The kinetics of formation of clathrate hydrates of methane was investigated in a water-in-oil emulsion using high-pressure differential scanning calorimetry in the range 10–40 MPa, at various temperatures. At high driving force, the heat peak related to the formation of hydrates has a regular and symmetric shape, and its height and width depend on the [...]
Application of high pressure DSC to the kinetics of formation of methane hydrate in water-in-oil emulsion (2006)
Samedi 30 janvier 2010A micro DSC analyzer fitted with special high-pressure vessels was used to investigate the kinetics of methane hydrate formation in the water phase dispersed as a stable emulsion in deep offshore drilling fluids. At high sub-cooling conditions, the peak of hydrate formation is perfectly visible and regular-shaped, and could be fitted by a Gaussian law. [...]