PVT, viscosity, and surface tension of ethanol: New measurements and literature data evaluation

Density gradient theory combined with the PC-SAFT equation of state used for modeling the surface tension of associating systems

“…The influence parameter for ethanol was evaluated from the REFPROP [18] data, using recent correlation by Mulero et al [30], instead of the Somayajulu's [26] correlation. The REFPROP data seems to be more accurate, especially in the central temperature region, as it agrees well with another recent correlation by Goncalves et al [31]. On the other hand, no such discrepancy between the REFPROP data and the Somayajulu's correlation was found in case of methanol.…”

“…[18], and the temperature correlations by Somayjulu [26] and Goncalves et al [31] Figure 4 shows temperature dependence of the surface tension for ethanol. As can be seen, both GT + PC-SAFT and GT + PCP-SAFT provide quite good and comparable results over wide temperature range exceeding 200 K. The modeled surface tension agrees well both with the REFPROP [18] data and the correlation by Congalves et al [31]. Somayajulu's [26] correlation provides moderately higher surface tension within the central temperature region.…”

Correlation and prediction of biodiesel density for extended ranges of temperature and pressure

“…e ARD for the subsets from the validation set. Considering water and ethanol as standards at 298.15 K and 0.1 MPa, the thermal expansivity values of biodiesels were significantly higher than the one of water and lower than the corresponding value for ethanol (water: 2.57 Â 10 À4 K À1 [64]; ethanol 1.07 Â 10 À3 K À1 [65]). The thermal expansivity is related to the engine power loss due to the fuel heating [1].…”

Pressure–volume–temperature measurements of phosphonium-based ionic liquids and analysis with simple equations of state

“…Mixtures of those solvents with RTILs have been often studied for imidazolium [52,53] and recently also for phosphonium ILs [3]. is not so sharp when it is compared with those shown by other liquids, such as water [54], dichloromethane [55], ethanol [56], and nhexane [57]. However for n-dodecane the variation is weak [58] similar to that found for the ILs.…”

“…The higher free volumes of phosphonium in comparison with imidazolium, and in particular [31]. The data published by Kell [53] for water, from Ferreira et al [55,56] for dichloromethane and ethanol, those due to Cerdeiriña et al [57] and to Easteal and Woolf [58] for nhexane and n-dodecane were used. (b) Isothermal compressibility: legend as in (a).…”