Electronic polarizability of light crude oil from optical and dielectric studies

Frontiers in Theoretical and Applied Physics/UAE 2017

George, A.K.^1 ; Singh, R.N.^1

Department of Physics, College of Science, Sultan Qaboos University, P. O. Box 36, Al Khodh 123, Muscat, Oman^1

关键词: Dielectric studies;    Electronic-polarizability;    Increasing temperatures;    Lorentz-Lorentz equations;    Measured properties;    Refractive index measurement;    Temperature dependence;    Temperature-dependent density;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/869/1/012016/pdf
DOI  :  10.1088/1742-6596/869/1/012016

来源: IOP

【 摘 要 】

In the present paper we report the temperature dependence of density, refractive indices and dielectric constant of three samples of crude oils. The API gravity number estimated from the temperature dependent density studies revealed that the three samples fall in the category of light oil. The measured data of refractive index and the density are used to evaluate the polarizability of these fluids. Molar refractive index and the molar volume are evaluated through Lorentz-Lorenz equation. The function of the refractive index, FRI, divided by the mass density ρ, is a constant approximately equal to one-third and is invariant with temperature for all the samples. The measured values of the dielectric constant decrease linearly with increasing temperature for all the samples. The dielectric constant estimated from the refractive index measurements using Lorentz-Lorentz equation agrees well with the measured values. The results are promising since all the three measured properties complement each other and offer a simple and reliable method for estimating crude oil properties, in the absence of sufficient data.