کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4768120 1424527 2016 14 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Determination of solubility parameters from density measurements for non-polar hydrocarbons at temperatures from (298-433) K and pressures up to 137 MPa
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Determination of solubility parameters from density measurements for non-polar hydrocarbons at temperatures from (298-433) K and pressures up to 137 MPa
چکیده انگلیسی
The Hildebrand's solubility parameter, δ, gives a quantitative representation of the well-known “like dissolves like” aphorism for non-polar hydrocarbon liquids. This is of great commercial importance for certain polymers and hydrocarbon mixtures. However, the solubility parameters are usually available only at ambient conditions for a limited number of substances. Extrapolation of these parameters to high pressure and high temperature conditions is not attained by common empirical correlations or cubic equations of state. In this work a set of equations are derived from fundamental thermodynamic property relations to account for the pressure and temperature dependence of this cohesive energy parameter. The equations, which require a reference value for the solubility parameter -usually at ambient conditions- and volumetric data, are then applied to calculate the solubility parameters of four pure non-polar hydrocarbons, namely n-heptane, n-dodecane, benzene and toluene, at temperatures from (298-433) K and pressures up to 137 MPa. A comparison against literature data and predictions from the Perturbed Chain version of the Statistical Association Fluid Theory (PC-SAFT) and Peng-Robinson equations of state is also provided. The proposed method provides a novel approach for a quick, simple and accurate determination of the solubility parameters at elevated temperatures and pressures for non-polar hydrocarbons using density measurements.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Fluid Phase Equilibria - Volume 430, 25 December 2016, Pages 19-32
نویسندگان
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