Thermodynamic Properties of Ternary Mixtures Containing Ionic Liquids and Organic Solvents

Abstract

The densities, ρ, speed of sound, u, heat capacities, C p of pure 1-ethyl-3-methylimidazolium tetrafluoroborate, 1-methyl pyrrolidin-2-one, pyrrolidin-2-one, pyridine and ternary mixtures of 1-ethyl-3-methylimidazolium tetrafluoroborate (1) + 1-methyl pyrrolidin-2-one or pyrrolidin-2-one (2) + pyridine (3) and their binary mixtures of 1-methyl pyrrolidin-2-one or pyrrolidin-2-one (2) + pyridine (3) have been measured as a function of composition at (293.15, 298.15, 303.15, and 308.15) K and atmospheric pressure. The observed densities and speeds of sound data have been employed to determine excess molar volumes, V E and excess isentropic compressibilities, κS E of the investigated mixtures. The observed thermodynamic properties of the binary as well as ternary mixtures have been calculated by utilizing the topology of the constituents of mixtures (graph theory). It has been observed that graph theory successfully describes well the V E and κS E data of the studied binary and ternary ionic liquid mixtures.

Recommended vapor pressures for aniline, nitromethane, 2-aminoethanol, and 1-methyl-2-pyrrolidone

“…The agreement of newly obtained data with a single value reported by Dávila et al [87] and with all but one of the values reported by Dávila and Trusler [84] is within 0.5 % (see Fig. 7) while heat capacities by Mundwha et al [85] and by Sharma et al [88] were by more than 5 % lower. A preliminary simultaneous correlation of the selected vapor pressures performed separately with each heat capacity data set suggested that the value reported by Dávila and Trusler [84] at the highest temperature is slightly in an error and was omitted from the data fitting.…”

“…Although several new data sets were published [84,85,87,88], the differences between existing data sets were significant and new measurements were performed (see Table 5). The agreement of newly obtained data with a single value reported by Dávila et al [87] and with all but one of the values reported by Dávila and Trusler [84] is within 0.5 % (see Fig.…”

“…Data by Sharma et al[88,89], by Maham et al[90] and by Mundhwa et al[85] are out of scale. Data points represented by filled symbols were used to obtain parameters of Eq.…”

Speed of Sound and Ultrasound Absorption in Ionic Liquids

“…The database included papers in which experimental speed of sound data were reported for temperatures from 278.15 to 393.15 K and pressures from 0.1 to 200 MPa (142 articles), a paper in which experimental data are presented only as a plot (1 article), and works where only calculated values of speed of sound are available (22 articles) published in the period 2004–2014 (Table S1). ,,− ,− ,− ,,,,,− …”

Influence of Aprotic Cosolvents on the Thermophysical Properties of Imidazolium-Based Ionic Liquid

“…The experimental density values of IL and pure cosolvents in this work and those data already studied are reported in Table . − The density values of the pure substances and binary mixtures of IL with cosolvents were determined in the temperatures from (303.15 to 353.15) K at atmospheric pressure (0.0976 MPa) and presented in Tables to .…”