Showing papers in "Fluid Phase Equilibria in 1993"

TL;DR: In this paper, a mixed-integer nonlinear programming (MINLP) technique is used to solve the problem of selecting compounds with optimum value of an appropriate performance index, subject to material balances, process and design limitations and feasibility of molecular structures.

TL;DR: In this article, the mathematical modelling of nucleation and growth during the expansion process is used both in the interpretation of experimental observations, and as a guide for the identification of process conditions leading to unimodal particle size distributions.

TL;DR: In this paper, a segment-based local composition model for the Gibbs energy of polymer solutions is presented, which represents a synergistic combination of the Flory-Huggins description for the configurational entropy of mixing molecules of different sizes and the Non-Random Two Liquid (NRTL) theory for the local composition contribution from mixing solvents and polymer segments.

TL;DR: The parameters of correlating equations for the calculation of recommended values of saturated liquid density of 1-alkanols and normal alkanes are given in this article, based on a critical evaluation of published experimental values.

TL;DR: Armellini et al. as discussed by the authors determined the solubility of sodium chloride in water vapor at supercritical temperatures ranging from 450-550°C and sub- and supercritical pressures varying from 100-250 bar.

TL;DR: In this paper, a sample bomb of 300 cm 3 capacity was placed in the vapor phase loop which can be blocked off and the content of which could be analyzed without disturbing equilibrium, while the solubility of glucose in pure supercritical CO 2 is very small (10 −5 -10 −4 mol%), it shows a remarkable increase (2*10−4 −5*10 −2 mol%) with increasing pressure when ethanol is added as a polar co-solvent.

TL;DR: In this paper, five key systems have been selected by the IUPAC workshop on vapor-liquid equilibria of 1-alkanol + n-alkane mixtures for testing models and correlation methods of thermodynamic excess properties.

TL;DR: In this paper, a novel technique to determine asphaltene precipitation and relative amounts precipitated is presented, which is based on measurement of electrical conductivity, of the crude oil.

TL;DR: Li et al. as mentioned in this paper measured the equilibrium solubility of carbon dioxide in aqueous mixtures of monoethanolamine (MEA) with methyldiethanolamine (MDEA) using the model of Kent and Eisenberg.

TL;DR: In this paper, the authors used gradient theory of inhomogeneous fluids to describe planar interfaces and used the Peng-Robinson equation of state and related models for the influence parameter to predict the interfacial profiles and tensions of interfaces.

TL;DR: LuLu et al. as mentioned in this paper improved the mean spherical approximation (MSA) method by the introduction of the effective diameter of the cation, which is mainly attributed to the solvation effect.

TL;DR: In this paper, the identification of CO 2 -philic functionalities, synthesis and characterization of surfactants and chelating agents containing these functionalities and their phase behavior in supercritical CO 2.

TL;DR: Peters et al. as mentioned in this paper reported on the phase behavior of binary mixtures of propane with hexacontane (n-C60H122), and the measurements cover a temperature range from about 310 K up to 430 K.

TL;DR: In this article, a lattice-fluid EOS was used to evaluate the interaction and size parameters of fatty acids and triglycerides for developing a phase equilibrium prediction model for the supercritical CO2- fatty oil component systems.

TL;DR: In this paper, a computer-operated differential static apparatus is described, which is suitable for highly precise measurements up to appr. 100°C and 1 bar differential pressure, for the exploration of the very dilute regions, volume ratios of 1:2000 of the components can be injected into the equilibrium cell with the required precision.

TL;DR: In this article, the authors used the predictive method of Englezos and Bishnoi to compute the equilibrium pressures at the experimental temperatures for all the electrolyte solutions studied, including those for 10 wt% NaCl solution.

TL;DR: In this article, phase equilibria for the system carbon dioxide + dl-α-tocopherol were studied, at temperatures from 292 K to 333 K and pressures up to 26 MPa.

TL;DR: In this article, the ternary phase equilibria of polyethylene glycol - ammonium sulfate- water and polyethylenes glycol- sodium carbonate -water have been determined experimentally at 15°, 25°, 35° and 45°C and for two different molecular weights of the polymer.

TL;DR: In this paper, the Flory theory has been modified slightly and applied to the correlation of the critical constants of normal alkanes such as linear polyethylene, with the primary goal of extrapolating to very large normal alkanes.

TL;DR: In this article, the potential to adjust reaction rates and reaction selectivities in supercritical fluids (SCF) solvents is also enhanced as a consequence of two effects of molecular charisma.

TL;DR: A survey of literature references of experimental phase equilibria and solubility data on binary and multicomponent systems of supercritical fluids and fish oil or derived compounds is presented in this paper.

TL;DR: Kordikowski et al. as mentioned in this paper showed that the resulting ternary critical curves exhibit cosolvency effects and miscibility windows for binary mixtures of CO2 with 1-dodecanol.

TL;DR: Orbey et al. as mentioned in this paper combined a mixing rule for cubic equations of state with the UNIPAC group contribution method to yield a completely predictive thermodynamic model for the vapor-liquid and liquid-liquid phase behavior of slightly and highly non-ideal mixtures over large ranges of temperature and pressure.

TL;DR: In this article, Tian et al. proposed a static method for simultaneous determination of vapor-liquid equilibrium compositions and molar volumes of coexisting liquid and vapor phases up to the critical temperature.

TL;DR: A brief history of the Redlich-Kwong equation of state is given in this paper, from the original version of 1948 to the present versions, which have extended its use to strongly non-ideal systems.

TL;DR: A review of excess volume data for (1-alkanol + n-alkane) systems and recommended data sets is presented in this article, which covers 54 systems in 207 data sets published up to 1991.

TL;DR: In this paper, a modified mixing rule for PR EOS is proposed to correlate the experimental solubility data reported in literatures and measured in this work, and the PVT data of three high H 2 S-content natural gas mixtures were measured in a computer controlled mercury free PVT system and successfully modelled by equations of state.

TL;DR: Horizoe et al. as discussed by the authors showed that ethanol-water solution can be separated completely by supercritical and subcritical propane or proylene solvent extraction, as has been predicted previously using the group contribution equation of state model.

TL;DR: In this article, a new expression for the temperature dependence of the attractive parameter of the SRK equation of state was proposed, which can be applied to polar and non-polar compounds.

TL;DR: In this article, the authors explore the two-dimensional equation of state representation of the multicomponent adsorption isotherm and find that the eos representation is more accurate than either ideal adsorbed solution theory of Prausnitz and Myers or the generalized Langmuir theory.