Showing papers on "Binary system published in 1989"
TL;DR: In this paper, the authors measured the equilibrium pressure and compositions for the binary mixture carbon dioxide-iso-pentane on nine isotherms from 253K to the iso-entane critical temperature, on each isotherm, the entire pressure range of phase coexistence was covered.
Abstract: Equilibrium pressures and compositions for the binary mixture carbon dioxide-iso-pentane were measured on nine isotherms from 253K to the iso-pentane critical temperature. On each isotherm, the entire pressure range of phase coexistence was covered. The mixture critical line has been located and is shown to be contiuous in Pressure-Temperature-Composition (P-T-X) space between the critical points of the pure components. Comparisons are made between the experimental results obtained by Besserer-Robinson and this work with predictions of the Soave-Redlich Kwong, Peng-Robinson, Kubic-Martin, and Adachi-Lu-Sugle cubic equations of state. None was able to correlate the data within our estimated experimental error.
72 citations
TL;DR: In this paper, the Gibbs Monte Carlo method is applied to the study of fluid-fluid phase equilibrium in a binary system of symmetric, non-additive hard spheres, previously studied by Melnyk and Sawford.
Abstract: The ‘Gibbs’ Monte Carlo method introduced by Panagiotopoulos to study coexisting phases, is applied to the study of fluid-fluid phase equilibrium in a binary system of symmetric, non-additive hard spheres, previously studied by Melnyk and Sawford [1]. We find that the method is generally applicable, although requiring a significantly larger number of insertions per Monte Carlo step at higher densities than in the previously studied cases of gas-liquid binary mixtures. The coexistence curve calculated using this technique agrees qualitatively although not quantitatively with that obtained in [1]. In particular, in contrast to their results, the coexistence curve at high density is found to be significantly closer to the estimates from second order perturbation theory than those obtained from first order perturbation theory. The critical density ηcr is estimated to be ηcr = 0·2175+0·0025 -0·0075. However, near the critical density, relatively large long-time fluctuations render the calculation of the coexis...
71 citations
TL;DR: In this article, the authors describe the design, construction, and testing of a simple vapor-liquid equilibrium apparatus designed for measurements in the range 300-500{Kappa} at pressures to 150 bar.
Abstract: The authors describe the design, construction, and testing of a simple vapor-liquid equilibrium apparatus designed for measurements in the range 300-500{Kappa} at pressures to 150 bar Data are given for measurements of P, T, x, and y for binary systems of carbon dioxide with n-butane and isobutane in the range 310-394{Kappa}
62 citations
TL;DR: In this paper, a reversible gelation was observed in mixtures of dense carbon dioxide and semi-fluorinated alkanes, and the gelation occurred when a liquid-vapor binary solution was isothermally expanded at ambient temperature until three-phase S-L-V equilibria was established.
61 citations
TL;DR: Les donnees experimentales (P-T-x-y) pour neuf isothermes de 277.9 and 418.48 K sont determinees et les resultats obtenus sont correles aux equations d'etat cubiques, equations de Soave-Redlich et de Peng-Robinson.
Abstract: Les donnees experimentales (P-T-x-y) pour neuf isothermes de 277.9 et 418.48 K sont determinees et les resultats obtenus sont correles aux equations d'etat cubiques, equations de Soave-Redlich et de Peng-Robinson
49 citations
TL;DR: In this paper, an oxygen-free, stable Fe-rich phase A2, formed peritectically in the range 750-800°C, was found in binary Fe-Nd alloys.
42 citations
TL;DR: In this paper, the solubility of hydrogen in molten aluminum alloys containing copper, lithium, magnesium, and silicon was calculated from the results of binary metal-metal interaction parameters.
Abstract: The solubility of hydrogen in molten aluminum alloys containing copper, lithium, magnesium, and silicon has been calculated from the solubility of hydrogen in pure metals and binary metal-metal interaction parameters. For the aluminum-copper binary system, where experimental data exist, the agreement between calculated and experimental values is excellent. The solubility of hydrogen in liquid silicon was calculated from the solubility data in aluminum-silicon alloys.
40 citations
TL;DR: In this paper, phase compositions were determined for the n-butane - hydrogen sulfide system and the isobutane-hydrogen sulfide systems, and the critical temperatures and corresponding critical pressures were constructed for both binary systems.
Abstract: Vapor and liquid equilibrium phase compositions were determined at 933, 1033, 1072, 1211, 1350, and 1450{sup 0}C for the n-butane - hydrogen sulfide system and at 711, 900, 980, 990, 1100, and 1250{sup 0}C for the isobutane-hydrogen sulfide system Measurements were made at pressures from the vapor pressure of the butanes to the critical pressure for the binary systems at each temperature Equilibrium ratios for each component were calculated at each temperature from the phase composition data The critical temperatures and corresponding critical pressures were measured and the critical loci were constructed for both binary systems
35 citations
TL;DR: In this article, the Debye-Huckel relationship for solution phase activity coefficients and the Wilson equation for the resin phase were used to characterize binary ion exchange equilibria.
33 citations
TL;DR: In this article, the authors provided the first systematic characterization of the coformer effect in a chalcogenide glass system, and showed that the presence of a coformer leads to an increase in the electrical conductivity and a decrease of the activation energy.
Abstract: Non-oxide chalcogenide glasses based on more than one network former species have certain advantages for applications as solid electrolytes in batteries. To elucidate the influence of competitive glass-formation on the structural and motional properties of ionically conductive chalcogenide glasses, the system (Li2S)0.67[(B2S3)1−y
(P2S5)
y
]0.33 has been characterized comprehensively by DSC, electrical conductivity and6Li,7Li,31P, and11B solid state NMR techniques. The data obtained provide the first systematic characterization of the coformer effect in a chalcogenide glass system. Homogeneous glassy samples are formed fory=0.3 and 0.9≦y≦1.0, and microphase separated glasses for 0≦y≦0.2. The presence of a coformer leads to an increase in the electrical conductivity and a decrease of the activation energy, as compared to either binary system (Li2S-B2S3 or Li2S-P2S5), but only if homogeneous glasses are formed. The NMR data, in conjunction with systematic DSC and NMR studies of the binary systems (Li2S)x(B2S3)1−x (0.50≦x≦0.75) and (Li2S)
x
(P2S5)1−x
(0.50≦x≦0.70), lead to the following conclusions: 1)11B MAS-NMR is well-suited to quantitate the amounts of three- and four coordinated boron atoms; in the binary glasses, the fraction of four-fold boron (N4) increases with decreasing Li2S/B2S3 ratio; in the ternary glasses N4 increases with increasingy. 2)31P MAS-NMR spectra of the binary glasses discriminate between three different phosphorus microenvironments, assigned to sulfide-analogs of metaphosphate, pyrophosphate, and orthophosphate species, respectively. These results suggest the applicability of network modification models originally developed for oxide glasses. For the ternary glasses, the DSC and NMR data of glasses with low phosphorus contents are consistent with a phase separation model involving a Li-rich thioborate glass that contains all of the phosphorus component and a glass phase less rich in lithium containing the four-fold boron atoms. In addition to the structural studies, the7Li spin-spin relaxation times (T
2) are used to characterize the mobility of the Li atoms. The activation energy of Li motion, determined from temperature dependentT
2 measurements and analyzed by using BPP theory differs from that determined from conductivity measurements by a factor of 2–3, possibly reflecting the inapplicability of this theory to the lithium diffusion process.
32 citations
TL;DR: In this paper, the type of phase behaviour that can be deduced from the experiments is discussed in terms of (p, T) projections and compared to the behaviour in other binary N2 systems.
TL;DR: In this article, the thermochemical analysis of the binary system AlY is described and the thermodynamic description of the system is optimized using experimental values of phase diagram and thermodynamic experiments.
Abstract: The thermochemical analysis of the binary system AlY is described. The thermodynamic description of the system is optimized uisng experimental values of phase diagram and thermodynamic experiments. For the liquid phase, Redlich-Kister polynomials are used. Al3Y, Al2Y, AlY, Al2Y3 and AlY2 are treated as stoichiometric phases. For enthalpies of formation of the compounds, values estimated with the Miedema model are used to eliminate a contradiction among different measured values.
TL;DR: In this paper, the phase diagram of a binary system between NdBa2Cu3O7 and 3BaCuO22CuO has been studied, and a liquidus line which is favorable for obtaining Nd Ba2 Cu 3O7 single crystals from solution is found to exist in a rather wide range compared with that of YBa2cu3O 7.
Abstract: The phase diagram of a binary system between NdBa2Cu3O7 and 3BaCuO22CuO has been studied. A liquidus line which is favourable for obtaining NdBa2 Cu3O7 single crystals from solution is found to exist in a rather wide range compared with that of YBa2Cu3O7. Single crystals of NdBa2Cu3O7-y have been grown by both the slow-cooling method and the top-seeded solution growth (TSSG) method, in accordance with the obtained phase diagrams of the NdBa2Cu3O7-3BaCuO22CuO system and our earlier Y2O3-CuO-BaO system.
TL;DR: In this article, high-pressure vapor-liquid equilibrium composition and density data of the binary systems nitrogen + n-butane (at 339.4 and 380.2 K) and argon + nbutane(at 340.0 and 0.1 K) are reported.
Abstract: High-pressure vapor-liquid equilibrium composition and density data of the binary systems nitrogen + n-butane (at 339.4 and 380.2 K) and argon + n-butane (at 340.0 and 380.1 K) are reported. The data sets sere fit with the Peng-Robinson equation of state using both generalized and fluid-specific temperature-dependent parameters. The binary interaction parameters so obtained are reported.
TL;DR: In this article, experimental liquid-liquid equilibrium data for the ternary system cyclohexane, n-hexane-methanol and for the binary systems nhexane methanol (n-hexANE-mETHanol) and cyclomethane mithanol were presented over a temperature range from 284 to 298{Kappa} at pressure of 0.1 MPa.
Abstract: Experimental liquid-liquid equilibrium data for the ternary system cyclohexane-n-hexane-methanol and for the binary systems n-hexane-methanol and cyclohexane-methanol are presented over a temperature range from 284 to 298{Kappa} at pressure of 0.1 MPa. Attention is given to the effect of the purity of methanol as far as the water content is concerned. The data are correlated by means of excess Gibbs energy models (NRTL and UNIQUAC), and the binary interaction parameters are reported.
TL;DR: Mean droplet diameter of the dispersed phase in pulsed plate extraction columns was measured for binary and ternary systems as discussed by the authors, and two new empirical correlations of mean droplet sizes in mass transfer conditions were proposed.
Abstract: Mean droplet diameter of the dispersed phase in pulsed plate extraction columns was measured for binary and ternary systems. A change in the droplet size in the presence of solute, dependent on such factors as the direction of mass transfer, droplet size in the binary system, radio of diffusion coefficients, viscosity of the continuous phase, interfacial tension and driving force for extraction was observed. Two new empirical correlations of mean droplet sizes in mass transfer conditions are proposed. These correlations have been successfully applied to other extraction columns.
TL;DR: In this paper, the vapor-liquid equilibrium data for the binary and ternary systems composed of acetone, 2-propanol, and 1-Propanol at the isobaric condition of 760 mmHg are presented.
Abstract: The vapor-liquid equilibrium data for the binary and ternary systems composed of acetone, 2-propanol, and 1-propanol at the isobaric condition of 760 mmHg are presented. The experimental data of the binary systems were used to calculate the binary parameters of the Wilson equation. These parameters have been used to calculate vapor-phase compositions and boiling points of related binary and ternary systems. Calculated vapor-phase compositions and boiling points have been obtained very close to the experimental data for each system investigated.
TL;DR: In this article, solid-liquid phase diagrams of binary mixtures of aromatic hydrocarbons obtained from calorimetric studies were constructed by examining the curves of the heat flux versus temperature.
Abstract: The authors describe solid-liquid phase diagrams of binary mixtures of aromatic hydrocarbons obtained from calorimetric studies. The sample of the binary solid mixture is heated at a constant rate until the solid is completely melted. During that process, the heat flux needed is monitored. By examination of the curves of the heat flux versus temperature, the solid-liquid phase diagrams can be constructed. Three binary systems (fluorene-dibenzofuran, dibenzothiophene-dibenzofuran, fluorene-dibenzothiophene) have been studied. It turns out that the fluorene-dibenzofuran system forms a solid solution at any composition, while dibenzothiphene-dibenzofuran and fluorene-dibenzothiophene systems have immiscibility gaps in the solid phases.
TL;DR: In this paper, le equilibrium vapeur-liquide du systeme mentionne dans le titre est mesure de developper les parametres UNIFAC de solvants selectifs utilises lors de la distillation extractive.
Abstract: L'equilibre vapeur-liquide du systeme mentionne dans le titre est mesure afin de developper les parametres UNIFAC de solvants selectifs utilises lors de la distillation extractive
TL;DR: In this paper, different types of phase behavior observed in binary mixtures containing a solid and a supercritical fluid (SCF) are discussed at the super critical fluid extraction conditions.
Abstract: Different types of phase behavior observed in binary m ixtures containing a solid and a supercritical fluid (SCF) are discussed at the supercritical fluid extraction conditions. The pressure-temperature (P-TI projection of the sol id-1 iquid-gas (S-L-GI three-phase coexistence curves together with the equilibrium liquid phase composition (x) values were determined by the first freezing point (FFP) method. brium cell was useful for the determination of liquid-gas critical l oci for the binary system, leading to the location of the upper critical end point. The FFP technique was extended to ternary mixtures contain- ing two solids. (S1-S2-L-G) four-phase coexistence curves together with the x values of the two solids were successfully determined. In addition, methods for calculation of solid solubilities in SCF by means of cubic equations of state are presented. The equili-
TL;DR: The total vapour pressures of the binary system containing octan-1-ol and n-decane were measured at 373.15 K and 383.15 k using the ebulliometric method as discussed by the authors.
TL;DR: In this article, the effect of small amounts of naphthalene on the phase equilibria of carbon dioxide with cyclohexane was investigated using the Peng-Robinson equation of state with two temperature independent interaction parameters.
TL;DR: In this article, the authors used the Nelder- Mead technique to minimize an objective function based on the total pressure of pure α-pinene and correlated the data by using the Antoine equation.
TL;DR: In this paper, a general method of using rational function to fit binary thermodynamic properties and then to predict the ternary ones in terms of solution models has been presented, and it is expected that such a treatment will be suitable for most of terNary systems.
Abstract: A general method of using rational function to fit binary thermodynamic properties and then to predict the ternary ones in terms of solution models has been presented It is expected that such a treatment will be suitable for most of ternary systems
TL;DR: A comprehensive survey of approximately calculated Al-As-M and In-AsM (M=Ag, Au, Co, Cr, Cu, Fe, Hf, Ir, Mn, Mo, Nb, Ni, Os, Pd, Pt, Re, Rh, Ru, Ta, Ti, V, W and Zr) ternary phase diagrams at room temperature is presented in this paper.
Abstract: A comprehensive survey of approximately calculated Al-As-M and In-As-M (M=Ag, Au, Co, Cr, Cu, Fe, Hf, Ir, Mn, Mo, Nb, Ni, Os, Pd, Pt, Re, Rh, Ru, Ta, Ti, V, W and Zr) ternary phase diagrams at room temperature is presented. Regions of greater uncertainty are indicated by alternative tie lines. The calculations are based on following approximations: Ternary phases and solid solubilities are disregarded and the Gibbs energy of formation of binary compounds is mostly estimated by the enthalpy of formation calculated from Miedema's model. Binary phase diagram data were critically reviewed and listed in two tables. A systematic behavior of the ternary systems according to the periodic table is shown to exist.
TL;DR: In this article, a multichannel ultraviolet-photometric zone detector was used to obtain information about how the transient state is affected by the sample solution, such as the pH (pH s ), the concentration and the ratio of the constituent concentration.
TL;DR: The phase equilibria in the pseudo-binary system Bi2O3-TeO2 at 600° ∼ 950° C in air were examined by solid-state reaction techniques and X-ray powder diffraction method as discussed by the authors.
Abstract: The phase equilibria in the pseudo-binary system Bi2O3-TeO2 at 600° ∼ 950° C in air were examined by solid-state reaction techniques and X-ray powder diffraction method. Four pseudo-binary compounds appeared, i.e., δ-Bi2O3 type solid solution having a compositional range of (1-x)Bi2O3·xTeO2 wherex=0 ∼ 0.4 a new compound Bi6Te2O15 which has an orthorhombic cell of a=2.27(4) nm, b=1.06(1) nm and c = 0.539(8) nm, 2Bi2O3 · 3TeO2, and an unidentified phase Bi2O3·2TeO2. The formation of the phase Bi6Te2O15, in which all the Te ions are hexavalent, was confirmed by the thermogravimetry and by the Mossbauer spectra. The liquidus curves for whole system were determined by DTA method.
TL;DR: The formation of a crystalline complex of 18crown-6 with water has been shown for the first time by Raman spectroscopy; the Raman spectral observations, incorporated with the measurement of the liquidus, lead to a phase diagram of this binary system as mentioned in this paper.
Abstract: The formation of a crystalline complex of 18-crown-6 with water has been shown for the first time by Raman spectroscopy; the Raman spectral observations, incorporated with the measurement of the liquidus, lead to a phase diagram of this binary system, indicating that the molar ratio of 18-crown-6 to water in the complex is approximately 1 : 4–6.
TL;DR: Determination de la temperature and de la pression critiques ainsi que des volumes molaires partiels a dilution infinie as mentioned in this paper, a.k.a.
Abstract: Determination de la temperature et de la pression critiques ainsi que des volumes molaires partiels a dilution infinie