WebMar 11, 2024 · The crude oil was characterized according to standard methods. The prepared ionic liquids were evaluated as asphaltene dispersant using the kinematic … WebOct 22, 2012 · They introduced PRI as the refractive index at the onset of asphaltene precipitation and proposed that the following equation can be used as a measure of the asphaltene stability: (3) Δ ( RI) = ( RI) oil − PRI considering the following stability criteria: • Crude oil with Δ (RI)>0.060 are more likely to have stable asphaltenes. •
Correlations between SARA Fractions, Density, and RI to ... - Hindawi
Refractive index (RI) measurement is a powerful tool in determining onset of asphaltene precipitation when a crude oil sample is titrated with a precipitant. It is also a useful method for creating correlations with other properties of crude oil such as solubility parameter and density. Because of the polarizability … See more This method is used to obtain the asphaltene onset pressure (AOP) associated with a live oil sample when it undergoes an isothermal depressurization process in a PVT cell … See more This method is established based on the idea of describing an asphaltenic crude as a “colloidal suspension” when asphaltene particles precipitate out of the solution. Based on the extensive research conducted in the … See more It is believed that the presence of heteroatoms such as oxygen, nitrogen and sulfur in asphaltenes makes it possible to consider this fraction of oil to have a “surfactant-like … See more Optical microscopy was used by several researchers to detect onset of asphaltene precipitation when a crude oil is titrated with increasing concentration of a precipitant at ambient … See more WebJun 2, 2015 · The asphaltene is assumed to have the solubility parameter of the best solvent. ... showed that the measurements of the refractive index of crude oils can be used to determine the solubility parameters required for the Flory-Huggins model. The Hirschberg et al. approach also has been used with some degree of success by: Burke et al., bebe hair design
A review on methods of determining onset of asphaltene …
WebJan 1, 2011 · On the basis of refractive index measurement, the precipitation and the stability of asphaltene in crude oil is monitored during a linear relationship between the refractive index function... WebAsphaltene flocculation occurs when oil solvency is reduced. Flocculated asphaltene could have detrimental effects on oil production, transportation and refinary process. Refractive … WebApr 25, 2007 · ABSTRACT A microscopic study of the onset of asphaltene precipitation is reported. The onset conditions can be quantified by measurement of mixture refractive index, together with microscopic observations of particulate formation in mixtures of oil and precipitant, with or without added solvents. bebe hair studio