Rheology of Water-in-Crude Oil Emulsions: Influence of Concentration and Temperature

Colloids and Interfaces

Kuchina, YuliyaA.¹  Kolotova, DariaS.² 

[1] Author to whom correspondence should be addressed;Murmansk State Technical University, Sportivnaya 13, 183010 Murmansk, Russia

关键词: crude oil;    water-in-crude oil emulsions;    rheology;    emulsion stability;   

DOI  :  10.3390/colloids2040064

学科分类：物理化学和理论化学

来源: mdpi

【 摘 要 】

The effect of aqueous phase content and temperature North Sea crude oil emulsion viscoelastic behavior has been studied. Heavy crude oil from the North Sea is of high viscosity and is capable of forming stable water-in-crude oil (w/o) emulsions without introducing any synthetic surfactants. The aqueous phase volume content was varied from 1 to 40%, and the temperature was varied from 0 to 30 °C. The w/o emulsion viscosity increased sharply when the aqueous phase content exceeds 20%, being more pronounced at the lower temperatures. The viscosity flow curves for emulsions containing more than 20% aqueous phase demonstrate non-Newtonian behavior, in contrast to crude oil, which is Newtonian. The coefficients in the master curve describing the viscosity-temperature dependence were determined. Oscillatory rheological tests showed that the loss modulus substantially exceeds the storage modulus which indicates the liquid-like state of the emulsions.

【 授权许可】

CC BY