کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
595174 1454003 2010 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Dielectric response as a function of viscosity for two crude oils with different conductivities
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی شیمی کلوئیدی و سطحی
پیش نمایش صفحه اول مقاله
Dielectric response as a function of viscosity for two crude oils with different conductivities
چکیده انگلیسی

Dielectric properties and viscosities of two different crude oils (labelled E and N) and solutions of them diluted in toluene or heptane were measured by frequency domain spectroscopy and rheology, respectively. Crude oils E and N diluted with toluene show a linear trend when plotting conductivity as a function of 1/viscosity. The crude oils diluted with the same amount of heptane show a lower conductivity than those in toluene. These results indicate that the conductivity of crude oil solutions is governed by the aggregation state of the asphaltenes more than their quantity in the crude, since asphaltenes are known to be in a more aggregated state in heptane than in toluene. In order to vary the viscosity while keeping the asphaltene concentration and solvation status constant, conductivity measurements of both crude oils diluted with solutions of polystyrene in toluene were performed. For the results obtained for the polystyrene modified systems, the proportionality between conductivity and 1/viscosity is not valid for low viscosities.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Colloids and Surfaces A: Physicochemical and Engineering Aspects - Volume 369, Issues 1–3, 20 October 2010, Pages 20–26
نویسندگان
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