Abstract
Densities (ρmix) and speeds of sound (umix) for binary blends of Jatropha curcas biodiesel (1) + n-butanol or n-pentanol (2) were measured at T = (288.15 to 308.15) K and atmospheric pressure, over the entire composition range, with the help of a density and sound velocity meter (DSA 5000 M, Anton Paar). The density values were used to evaluate the excess molar volumes VmixE. The Redlich–Kister polynomial equation was adopted to compute and correlate the results, and a good agreement has been observed between experimental and calculated values. It has been observed that the ρ and u values of pure components and their binary blends decreased with respect to temperature. Further, results have been analyzed in terms of molecular forces functioning between biodiesel and alcohols.
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