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Showing papers on "Binary system published in 2003"


Journal ArticleDOI
TL;DR: A superionic crystal analogous to highly conductive thio-LISICON, which is a series of sulfide crystalline solid electrolytes such as Li4GeS4−Li3PS4, was successfully formed by the crystallization of mechanically milled Li2S−P2S5 glasses as discussed by the authors.

298 citations


Journal ArticleDOI
TL;DR: In this article, the phase boundaries of a binary mixture of an air and water-stable ionic liquid and a supercritical fluid have been studied experimentally, and the Peng-Robinson equation of state is used to model this binary system.
Abstract: In order to gain insight into the phase behavior of ionic liquids+supercritical fluids, the phase boundaries of a binary mixture of an air- and water-stable ionic liquid and a supercritical fluid has been studied experimentally. For this purpose, fluoroform (CHF3) was considered as the supercritical fluid and 1-ethyl-3-methylimidazolium hexafluorophosphate ([emim][PF6]) was selected as the ionic liquid. A synthetic method was used to measure vapor–liquid and solid–liquid boundaries. Results are reported for CHF3 concentrations ranging from 10.1 to 99.0 mol%, and within temperature and pressure ranges of 309.3–367.5 K and 1.6–51.6 MPa, respectively. The Peng–Robinson equation of state is used to model this binary system.

170 citations


Journal ArticleDOI
TL;DR: In this article, the adsorption of binary gas mixtures of CO 2 N 2, CO 2 CH 4 and CH 4 N 2 were studied by using H-ZSM-5 as the adsorbent with a SiO 2 /Al 2 O 3 ratio of 280.

170 citations


Journal ArticleDOI
TL;DR: In this article, a borate compound named BiBO 3 in the PDF within the composition range 52.5 - 57.5 mol% B 2 O 3 was found in the binary system.
Abstract: In the binary system Bi 2 O 3 - B 2 O 3 glasses were prepared in the composition range 57. 5 mol% - 80 mol% B 2 O 3 by defined slow cooling of large melt samples (about 75 cm 1 , each). Temperatures of crystallization, of melting and of glass transition were determined and density data of the glasses were derived using the hydrostatic weighting method. Thermal expansion coefficients and high precision refractive indices, together with their dispersion, were measured. The measured physical properties indicate subtle discontinuous structural changes of the glasses with glass composition, that match with the ranges of existence of the crystalline compounds of the binary system Bi 2 O 3 - B 2 O 3 . Thermal investigations together with X-ray powder diffraction analyses of crystallized glass samples prove the so far doubtful existence of a borate compound named BiBO 3 in the PDF within the composition range 52. 5 - 57.5 mol% B 2 O 3 .

102 citations


Journal ArticleDOI
TL;DR: In this article, a static analytic apparatus taking advantage of a pneumatic capillary sampler (Rolsi™, Armines patent) developed in the Cenerg/TEP laboratory is combined with an exponential dilutor.

88 citations


Journal ArticleDOI
TL;DR: In this paper, the authors compared the obtained properties with those reported by other authors when available in the literature, and have analyzed in terms of the molecular interactions present in this kind of mixtures.

84 citations


Journal ArticleDOI
TL;DR: In this paper, the surface tension data of binary mixtures of ethanol + ethylene glycol were measured over the entire concentration range at temperatures from 20 to 50 °C, and the experimental values were correlated with temperature and with mole fraction.
Abstract: Surface tension data of binary mixtures of ethanol + ethylene glycol were measured over the entire concentration range at temperatures from 20 to 50 °C. The experimental values were correlated with temperature and with mole fraction. The values of the excess surface tension for these mixtures were also calculated.

82 citations


Journal ArticleDOI
TL;DR: In this article, the authors measured the viscosities, densities and speed of sound of 2-propanol with octane, decane, or dodecane at T=(293.15, 298.15 and 303.15) K and atmospheric pressure along with the properties of the pure components.

81 citations


Journal ArticleDOI
TL;DR: In this paper, the liquid-solid phase equilibrium of binary mixture system of tetradedcane and hexadecane has been studied, and the phase diagram illustrates a binary, isomorphous system with a temperature minimum.

72 citations


Journal ArticleDOI
TL;DR: In this paper, the excess molar volume and deviations in viscosity, molar refraction, and speed of sound have been calculated using the Redlich and Kister polynomial equation to derive the coefficients and standard errors.
Abstract: Densities, viscosities, and refractive indices at (298.15, 303.15, and 308.15) K, and the speed of sound at 298.15 K, are presented as a function of mixture composition for the binary mixtures of ethyl chloroacetate + cyclohexanone, + chlorobenzene, + bromobenzene, or + benzyl alcohol. Using these data, excess molar volume and deviations in viscosity, molar refraction, and speed of sound have been calculated. These results have been correlated with the Redlich and Kister polynomial equation to derive the coefficients and standard errors. Variations in the calculated excess quantities have been studied for mixtures of ethyl chloroacetate with component liquids.

69 citations


Journal ArticleDOI
TL;DR: In this paper, the critical properties of both binary mixtures (hexane + methanol, hexane + carbon dioxide, and a ternary mixture) and a binary mixture of hexane+ carbon dioxide + methenol were measured by using a high-pressure view cell with visual observation.
Abstract: Critical properties of both binary mixtures (hexane + methanol, hexane + carbon dioxide, and methanol + carbon dioxide) and a ternary mixture (hexane + carbon dioxide + methanol) were measured by using a high-pressure view cell with visual observation. The critical lines of the binary mixtures are continuous over the whole composition range between the critical points of the two pure components. The critical pressure of the binary mixtures of hexane + carbon dioxide and methanol + carbon dioxide shows a maximum, while the critical temperature of the binary mixture of hexane + methanol shows a minimum with the composition.

Journal ArticleDOI
TL;DR: In this article, the ultrasonic velocities of binary mixtures of N,N-dimethylformamide (DMF) + methanol, + ethanol, + 1-propanol,+ 1-butanol, +1-pentanol, and + 1hexanol have been measured at 30°C and the measured data are used to compute adiabatic compressibility (ks), deviation in Δks, intermolecular free length (Lf), molar volume (Vm), and available volume (Va).
Abstract: Densities, ρ and ultrasonic velocities, uof binary mixtures of N,N-dimethylformamide (DMF) + methanol, + ethanol, + 1-propanol, + 1-butanol, + 1-pentanol, and + 1-hexanol have been measured at 30°C. The ultrasonic velocities have been compared with values calculated from the free-length theory ( FLT) due to Jacobson and collision-factor theory ( CFT) due to Schaaffs. The measured data are used to compute adiabatic compressibility (ks), deviation in adiabatic compressibility (Δks), intermolecular free length (Lf), molar volume (Vm), and available volume (Va). The excess molar volume ( VmE) and excess free length (LfE) are also evaluated. For all systems, these results were satisfactorily correlated by the Redlich–Kister polynomial. These parameters are used to discuss dissociation of the self-associated 1-alkanol molecules and the formation of aggregates between unlike molecules through C=O...H–O hydrogen bonding.

Journal ArticleDOI
TL;DR: The pendant drop method, combined with efficient temperature control of the measuring cell, allows high precision measurements of both surface tension and interfacial tension in systems with liquid−liquid phase separation.
Abstract: The pendant drop method, combined with efficient temperature control of the measuring cell, allows high precision measurements of both surface tension and interfacial tension. The surface tensions and liquid densities of mixtures of cyclohexane + heptane, cyclohexane + propanone, and toluene + propanone have been determined at a normal pressure of 1 bar over the temperature range from 287 K to 317 K. The surface tension data could be parametrized with a cubic polynomial. Gibbs excess surface concentrations are derived from our experimental data, and the influence of activity coefficients is discussed. The high precision pendant drop apparatus allows accurate measurements of the interfacial tension in systems with liquid−liquid phase separation. In binary mixtures of heptane + N,N-dimethylformamide, heptane + N-methyl-2-pyrrolidone, and decane + N,N-dimethylformamide, the interfacial tension was measured over a wide temperature range close to the critical solution point. The densities of the corresponding ...

Journal ArticleDOI
TL;DR: The phase diagram of the Au-In-Sn system is of importance in developing materials of high performance in electronic packaging as well as in simulating the interfacial reaction between Sn-In and Au as mentioned in this paper.
Abstract: The phase diagram of the Au-In-Sn system is of importance in developing materials of high performance in electronic packaging as well as in simulating the interfacial reaction between Sn-In and Au. By using the calculation of phase diagram (CALPHAD) method, phase equilibria in the Au-Sn binary system has been optimized based on experimental thermodynamic property and recently renewed phase boundaries. Combined with two binary systems, Au-In and In-Sn, in addition to the reported experimental isothermal section of the Au-In-Sn system, the Au-In-Sn ternary system has been modeled, and three isothermal sections at 300 K, 500 K, and 700 K and three vertical sections, Au-In0.2Sn0.8, Au-In0.5Sn0.5, and Au-In0.7Sn0.3, of the Au-In-Sn ternary system have been further calculated.

Journal ArticleDOI
TL;DR: In this paper, the Mo-Zr binary system was optimized using the available experimental data on the phase diagram and two estimated enthalpy values, one for the formation of the Laves phase and another for the m...
Abstract: The Mo-Zr binary system has been optimized using the available experimental data on the phase diagram and two estimated enthalpy values, one for the formation of the Laves phase and one for the m ...

Journal ArticleDOI
TL;DR: In this paper, the authors present experimental density measurements for the binary systems acetone + water, propionic acid + water and water + water from 283.15 K to 323.15 k over the entire composition range.
Abstract: We present experimental density measurements for the binary systems acetone + water, propionic acid + water, and acetone + propionic acid from 283.15 K to 323.15 K over the entire composition range. A vibrating tube densimeter produced the experimental densities. We have also calculated excess volumes and correlated them with a Redlich−Kister polynomial form.

Journal ArticleDOI
TL;DR: The surface tension of aqueous binary solutions of 1-amino-2-propanol and 3-AMino-1-polymethyl-polypropanol was measured at temperatures from 298.15 k to 323.15 K.
Abstract: The surface tension of aqueous binary solutions of 1-amino-2-propanol and 3-amino-1-propanol and aqueous ternary solutions of these amines with diethanolamine, triethanolamine, and 2-amino-2-methyl-1-propanol was measured at temperatures from 298.15 K to 323.15 K. For binary mixtures, the concentration range was 0-100 mass percent alkanolamine, and for ternary mixtures, the concentration range for each amine was 0-50 mass percent. The experimental values for binary mixtures were correlated with mole fraction by an empirical equation (the maximum deviation was in both cases always less than 0.2%).

Journal ArticleDOI
TL;DR: In this paper, the Redlich-Kister equation has been used to estimate the binary fitting parameters and standard deviations from the regression lines are shown, where the excess molar volumes were fitted as a function of the mole fraction and temperature to a polynomial equation.

Journal ArticleDOI
TL;DR: In this paper, atmospheric pressure liquid densities for binary mixtures of n-methyldiethanolamine + water over the entire composition range at temperatures between 263.15 and 363.15 K were presented.
Abstract: In this paper, we present atmospheric pressure liquid densities for binary mixtures of n-methyldiethanolamine + water over the entire composition range at temperatures between 263.15 and 363.15 K. ...

Journal ArticleDOI
TL;DR: In this article, the interaction parameters (CH3−OCOO), (CH2−OCO), and CH2cy−OCOCOO) were determined for their application in the UNIFAC−VISCO method, based on contribution groups, to predict the dynamic viscosities of the binary mixtures.
Abstract: Viscosities have been determined for the binary mixtures dimethyl carbonate (DMC) + hexane, + heptane, + octane, and + cyclohexane and diethyl carbonate (DEC) + hexane, + heptane, + octane, and + cyclohexane at (293.15, 298.15, 303.15, and 313.15) K and atmospheric pressure. Viscosity deviations for the binary systems were fitted to the Redlich−Kister equation. From these experimental data, the interaction parameters (CH3−OCOO), (CH2−OCOO), and (CH2cy−OCOO) have been determined for their application in the UNIFAC−VISCO method, based on contribution groups, to predict the dynamic viscosities of the binary mixtures. Root-mean-square deviations are also gathered.

Journal ArticleDOI
TL;DR: The results of densities, viscosities, and refractive indices at (298.15, 303.15 and 308.15) K and speed of sound at 298.15 K in the binary mixtures of tri-n-butylamine with triethylamine, tetrahydrofuran, tetradecane, and tetrachloroethylene have been measured and used to calculate the excess molar volume, deviations in viscosity, molar refraction, and speed-of-sound as discussed by the authors.
Abstract: The results of densities, viscosities, and refractive indices at (298.15, 303.15, and 308.15) K and speed of sound at 298.15 K in the binary mixtures of tri-n-butylamine with triethylamine, tetrahydrofuran, tetradecane, tetrachloroethylene, pyridine, and trichloroethylene have been measured and used to calculate the excess molar volume, deviations in viscosity, molar refraction, and speed of sound. These results have been discussed to study the type of mixing behavior between the mixing molecules. The measured properties have been fitted to a polynomial equation to derive the coefficients and estimate the standard errors.

Journal ArticleDOI
TL;DR: In this article, the location of the azeotrope was calculated using the equality of Equation of State attractive parameter between the two phases, which was proved and even shown visually by means of two supplementary experiments with equipment based on the static synthetic method involving a variable volume cell.
Abstract: Isothermal vapor-liquid equilibrium data for the Difluoromethane (R32) + Propane binary system are presented at 278.10, 294.83, 303.23, 313.26 and 343.26 K and pressures up to 5.4 MPa. The experimental method is the static-analytic type. It takes advantage of mobile pneumatic capillary samplers (Rolsi™, Armines' patent) developed in our laboratory. At a fixed temperature the azeotrope vapor pressure is larger then those of the pure component. The particularity of R32-Propane azeotropic binary system is to present in two critical point over the critical temperature if the azeotrope. This particular behavior has been proved and even shown visually by means of two supplementary experiments with equipment based on the static-synthetic method involving a variable volume cell. Data along the five isotherms have been represented with the Soave-Redlich-Kwong (SRK) equation of state and MHV1 mixing rules involving the NRTL model. We have calculated the location of the azeotrope using the equality of Equation of State attractive parameter between the two phases.

Journal ArticleDOI
TL;DR: In this article, the Soave−Redlich−Kwong (SRK) equation of state coupled with the HVID mixing rules is correlated with the temperature of carbon dioxide + 2-propanol at temperatures from (293 to 323) K.
Abstract: Isothermal (P, T, x, y) data have been measured for the binary system carbon dioxide + 2-propanol at temperatures from (293 to 323) K. The pressure range under investigation was between (0.68 and 8.6) MPa. The new experimental data are correlated with the Soave−Redlich−Kwong (SRK) equation of state coupled with the HVID mixing rules. A correlation of the HVID parameters with temperature is proposed by using all reliable published data and those of this study.

Journal ArticleDOI
TL;DR: In this article, the authors have analyzed the performance of a novel binary accelerator system in the sulphur vulcanization of natural rubber (NR) and found that the performance is dependent on the relative proportion of mono, di and polysulphidic linkages in the material.

Journal ArticleDOI
TL;DR: In this article, the Au-in binary system has been thermodynamically reassessed through CALPHAD method, and a set of self-consistent parameters has been obtained, which can reproduce most experimental data of thermodynamic properties and phase diagram of this binary system.
Abstract: Through CALPHAD method, the AuIn binary system has been thermodynamically reassessed. The excess Gibbs energies of the solution phases, liquid, fcc, α1, and hcp were formulated with Redlich-Kister expression, while the γ and Ψ phases with narrow homogeneity ranges were described with sublattice models, and other intermetallic phases were treated as stoichiometric compounds. A set of self-consistent parameters has been obtained, which can reproduce most experimental data of thermodynamic properties and phase diagram of this binary system. Additionally, the standard formation enthalpies of all intermediate phases have also been calculated.

Journal ArticleDOI
TL;DR: In this article, a static analytic apparatus, taking advantage of a pneumatic capillary sampler (Rolsi, Armines' patent) developed in the Cenerg/TEP laboratory, is combined with an exponential dilutor for calibration purposes and a PVT apparatus to visualize and determine the hydrate-forming conditions.
Abstract: This project involves measurements of the vapor phase composition for the ethane + water binary system presenting phase equilibria near hydrate-forming conditions. The H2O + C2H6 binary system isothermal vapor phase data, concerning both vapor−liquid and vapor−hydrate equilibria, were measured at (278.08, 283.11, 288.11, 293.11, 298.11, and 303.11) K and pressures up to the ethane vapor pressure. In this work a static−analytic apparatus, taking advantage of a pneumatic capillary sampler (Rolsi, Armines' patent) developed in the Cenerg/TEP laboratory, is combined with an exponential dilutor for calibration purposes and a PVT apparatus to visualize and determine the hydrate-forming conditions. The six sets of isothermal P, y data are represented with the Peng−Robinson equation of state (PR-EoS) using the Mathias−Copeman α function and the Huron−Vidal mixing rules involving the NRTL local composition model (PR-EoS/MC-HV-NRTL). This equation (PR-EoS/MC-HV-NRTL) is also used to fit the available literature dat...

Journal ArticleDOI
TL;DR: In this article, the authors evaluated the performance of binary mixtures of ethylenediamine and water in the temperature range from 303.15 to 318.15 K at an interval of 5 K.

Journal ArticleDOI
TL;DR: In this paper, two metastable polymorphs of paracetamol (forms II and III) were prepared by appropriate thermal methods from binary mixtures containing 10% (w/w) of hydroxypropylmethylcellulose.

Journal ArticleDOI
TL;DR: In this paper, a consistent T-x phase diagram for the Si-N binary system is obtained by means of the CALPHAD (CALculation of PHAse Diagrams) method.
Abstract: Motivated by the thermodynamic assessment of the Ga–N and In–N binaries, the thermodynamic parameters of the Si–N system are optimized in a similar way. The intermetallic compound Si 3 N 4 is treated as stoichiometric and the terminal solution phase diamond_Si as the pure diamond_Si. The liquid solution phase is assumed to be a substitutional solution with Redlich–Kister formula for the expression of its excess Gibbs energy. The fugacity of nitrogen is considered when describing the behavior of the gas phase, especially with high pressure. The complete T – x phase diagram for the Si–N binary system is given. In this optimization a consistent thermodynamic data set for the Si–N system is obtained by means of CALPHAD (CALculation of PHAse Diagrams) method. The calculation results agree well with experiments.

Journal ArticleDOI
TL;DR: In this paper, the phase diagram of the Au-Zn binary system has been evaluated with the CALPHAD method, and the excess Gibbs energies of solution phases, liquid, fcc, hcp, and ϵ were formulated with the Redlich-Kister expression.