Excess molar volumes, viscosity, refractive index, and Gibbs energy of activation of binary biodiesel + benzene, and biodiesel + toluene mixtures at 298.15 and 303.15 K

2008 ◽  
Vol 82 (13) ◽  
pp. 2260-2268 ◽  
Author(s):  
Ufuk Sancar Vural ◽  
Fatih Durmaz ◽  
Ozcan Kocyigit ◽  
Hasan Kocyigit ◽  
V. Muradoglu ◽  
...  
Keyword(s):  
Refractive Index ◽  
Gibbs Energy ◽  
Excess Molar Volumes ◽  
Energy Of Activation ◽  
Molar Volumes ◽  
Gibbs Energy Of Activation

scholarly journals Prediction of excess molar volumes of selected binary mixtures from refractive index data

2014 ◽  
Vol 79 (6) ◽  
pp. 707-718 ◽  
Author(s):  
Jelena Vuksanovic ◽  
Divna Bajic ◽  
Gorica Ivanis ◽  
Emila Zivkovic ◽  
Ivona Radovic ◽  
...  
Keyword(s):  
Refractive Index ◽  
Binary Mixtures ◽  
Excess Molar Volumes ◽  
Mixing Rules ◽  
Mixing Rule ◽  
Molar Volumes ◽  
Index Data ◽  
Peg 400 ◽  
Benzene Toluene ◽  
Refractive Index Data

The excess molar volumes of twenty two binary mixtures containing various groups of organic compounds: alcohols (ethanol, 1-propanol, 1,2-propanediol, 1,3-propanediol and glycerol), ketone (acetone), ester (butyl lactate), lactam (N-methyl-2-pyrrolidone), PEGs (PEG 200, PEG 400) and aromatics (benzene, toluene and pyridine) were predicted from the refractive index data, using three types of equations coupled with several mixing rules for refractive index calculations: the Lorentz-Lorenz, Dale-Gladstone, Eykman, Arago-Biot, Newton, and Oster. The obtained results were analysed in terms of the applied equation and mixing rule and the nature of interactions between the mixtures? components.

scholarly journals Thermophysical properties of biofuel components derived from biomass

2016 ◽  
Author(s):  
◽  
Mbalenhle B. Nduli
Keyword(s):  
Refractive Index ◽  
Molar Volume ◽  
Binary Mixtures ◽  
Thermophysical Properties ◽  
Excess Molar Volume ◽  
Excess Molar Volumes ◽  
Isentropic Compressibility ◽  
Lorenz Equation ◽  
Molar Volumes ◽  
Increasing Temperature

The thermophysical properties of the binary mixtures containing biofuel components derived from biomass were determined. Experimental densities, speed of sound, and refractive indices for the binary mixtures (methanol or 1-ethyl-3-methylimidazolium acetate [EMIM][OAc] + furfural or furfuryl alcohol ) were measured at T = (298.15, 303.15, 308.15, 313.15 and 318.15) K. From the experimental data, excess molar volume, E m V , isentropic compressibility, s  , molar refractions, R, and deviation in refractive index, Δn, were calculated. The excess molar volumes were found to be negative for all systems studied. The isentropic compressibility were found to be both positive for the whole composition and temperature range and increases slightly with increasing temperature. The deviation in refractive index was positive over the whole composition range. The obtained values of excess molar volumes and changes of refractive index on mixing were satisfactorily correlated by the Redlich–Kister equation. The Lorentz–Lorenz equation was applied to predict the density and calculate the excess molar volume of the binary mixtures.

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