Excess molar volumes, excess isentropic compressibilities and excess speeds of sound of the ternary blends comprising of alkyl laurates and alkanols at various temperatures and atmospheric pressure

Abstract

Researchers have focused their attention on the thermodynamical investigation of biodiesel or its blends with diesel or alkanols. Such blends are considered as alternative fuel in automobile industries. This work is a systematic computation of excess molar volumes, $V_{123}^E$, excess isentropic compressibilities, ${\left({\kappa }_S^E\right)}_{123}$ and excess speeds of sound, $u_{123}^E$ (using measured densities and speeds of sound) of ternary methyl laurate (1) + ethyl laurate (2) + 1-propanol or 2-propanol (3) blends at temperatures ranging from 288.15 to 313.15 K in a step of 5 K. The interpretation of $V_{123}^E$, ${\left({\kappa }_S^E\right)}_{123}$ and $u_{123}^E$of present blends suggest that there is strong interactions/effective packing among the components of ternary methyl laurate + ethyl laurate + 2-propanol blend in comparison to methyl laurate + ethyl laurate + 1-propanol. Further, it has been observed that enhancement in temperature leads in decrease in strength of interactions among the molecules in mixed state.