A simplified thermodynamic modeling procedure for predicting asphaltene precipitation

Evaluating the hydrophilic–lipophilic nature of asphaltenic oils and naphthenic amphiphiles using microemulsion models

“…It is well established that reducing the solubility of asphaltenes within the oil phase results in the formation of aggregates that are surface-active compared to their monomeric counterparts [5][6][7][8][9][10]. This surfaceactivity has been linked to the formation of asphaltene skins at the oil-water interface that contribute to the stability of emulsions [11,12].…”

Thermodynamic modelling of asphaltene precipitation and related phenomena

“…Further modifications of the FloryHuggins theory have been presented and successfully applied to describe asphaltene precipitation. One example of such modifications is based on including a binary interaction parameter [108] that characterises the interaction between unlike molecules, as applied by Pazuki and Nikookar [109] and Mofidi and Edalat [110]; this interaction parameter is determined as a function of molecular weight [109,110]. Mohammadi et al [111] have combined the approach with chemical theory to account for asphaltene self-association resulting in n-mer aggregates.…”

Temperature effects on solubility of asphaltenes in crude oils

“…A suitable approach to investigate influences of different factors on the stability of colloidal dispersion is to determine flocculation onset point in crude oil (Andersen and Stenby, 1996;Cimino et al, 1995;Mofidi and Edalat, 2006). Solubility of asphaltenes depends on the solvating power of the solvent (Chung, 1992).…”