(p,Vm,T) measurements of (octane + benzene) at temperatures from (298.15 to 328.15) K and at pressures up to 40 MPa

Experimental densities, refractive indices, and speeds of sound of 12 binary mixtures containing alkanes and aromatic compounds at T=313.15K

“…Such behaviour can be the result of several opposing effects. The experimental results from Morávková et al [4] at T = (308.15 and 318.15) K are also presented in figure 1a. The excess molar volumes at these temperatures are similar to the excess molar vol- umes at the temperature studied, concluding that temperature has scarce influence in this excess property in this temperature range.…”

“…The results were used to calculate excess molar volumes, isentropic compressibility, and excess molar isentropic compressibility. The aromatic compounds used in this study are very important in petrochemical industries, and several studies on their physical properties at different temperatures and pressures [4][5][6][7] have been published, but no recent data on the binary mixtures under study at T = 313.15 K were found in literature. The temperature 313.15 K was chosen because these data will be used in future works about (liquid + liquid) equilibria and (vapour + liquid) equilibria, and recent literature data is scarce.…”

Volumetric behaviour of binary liquid systems composed of toluene, isooctane, and methyl tert-butyl ether at temperatures from (298.15 to 328.15)K

“…Our present project is devoted to the systematic study of liquid systems modelling liquid engine fuels. After measuring (cyclohexane + alkane) at normal pressure and T = 298.15 K [1], (cyclohexane + nonane) at temperatures from (298.15 to 328.15) K and at pressures up to 40 MPa [2], (octane + benzene, or +toluene, or +1,3-xylene, or +1,3,5-trimethylbenzene) at temperatures between (298.15 and 328.15) K [3], and (octane + benzene) at temperatures from (298.15 to 328.15) K and at pressures up to 40 MPa [4], the binary and ternary systems containing methyl tert-butyl ether (MTBE) have been studied with the aim to decide what and how many ternary constants, in addition to the binary constants, are needed to fit the ternary data to Redlich-Kister equation within the error of experimental results. This measurement is also of practical importance with respect to use of MTBE as the liquid fuel antiknock additive.…”

A novel approach to predict the excess volume of hydrocarbon mixtures

“…For binary mixtures of pentane, hexane and heptane (Pecar and Dolecek, 2003) we found that porosity changes due to temperature changes and due to pressure changes have a similar effect on G W . For other mixtures for which we could make this comparison, octane-benzene, nonane-cyclohexane and 1,3,5-trimethylbenzene-benzene, (Morá vková et al, , 2007 this was not the case. The constants were optimized simultaneously by minimizing the sum of squared errors with the help of a Matlab program.…”