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Investigation of Rheological Properties of water in crude oil emulsions

عنوان مقاله: Investigation of Rheological Properties of water in crude oil emulsions
شناسه ملی مقاله: SCCE06_095
منتشر شده در ششمین همایش ملی دانشجویی مهندسی شیمی و پنجمین همایش ملی دانشجویی مهندسی نفت در سال 1385
مشخصات نویسندگان مقاله:

بابک درخشنده - Department of Chemical and Petroleum Engineering Sharif University of Technology
محمد عسکری - Department of Chemical and Petroleum Engineering Sharif University of Technology
احمد رمضانی - Department of Chemical and Petroleum Engineering Sharif University of Technology

خلاصه مقاله:
Water and oil can make emulsions. Oil in water and water in oil emulsions have the same behavior in general but there are less information about water in oil emulsions. Rheological properties of these systems are very important. In this research we made different samples with different characteristics, some of them had surfactant and others without it. Then we investigated the different rheological properties of such systems. We measure viscosity variation of such systems versus shear rate variations, different water volume fractions and effect of adding surfactants to these systems. It is shown that these systems have a Newtonian viscosity below a certain shear rate and pseudo plastic behavior above that. Relative viscosity increases by increasing water volume fraction but after a certain value it increases sharply until it goes to infinity at a certain value. Our investigations showed that elastic modulus is low in moderate water volume fractions after a certain volume fraction elastic modulus increases sharply that shows there is a phase transition. Moreover, we find loss and storage modulus variations versus shear rate variations. In all cases G' showed a linear behavior and then a nonlinear behavior after that.

کلمات کلیدی:
Emulsion, Rheology, Viscoelasticity, Crude oil

صفحه اختصاصی مقاله و دریافت فایل کامل: https://civilica.com/doc/22190/