Quaternary liquid-liquid equilibrium studies on hydrocarbon-solvent systems

1992 ◽  
Vol 37 (1) ◽  
pp. 104-106 ◽  
Author(s):  
Jyotsna Naithani ◽  
Mohan K. Khanna ◽  
Shrikant M. Nanoti ◽  
Bachan S. Rawat
Keyword(s):  
Liquid Equilibrium ◽  
Equilibrium Studies ◽  
Hydrocarbon Solvent ◽  
Solvent Systems

Manipulation of the Liquid−Liquid Equilibrium of Vertrel-XF + Hydrocarbon Solvent Systems with the Addition of a Third Component

2002 ◽  
Vol 41 (11) ◽  
pp. 2792-2797 ◽  
Author(s):  
Joel A. Luckman ◽  
Jason A. Berberich ◽  
Daniel C. Conrad ◽  
Barbara L. Knutson
Keyword(s):  
Liquid Equilibrium ◽  
Hydrocarbon Solvent ◽  
Solvent Systems

Vapor-Liquid Equilibrium Ratios of Acid Gases and Hydrocarbons in Methyl Cyanoacetate

1972 ◽  
Vol 12 (04) ◽  
pp. 283-288
Author(s):  
Byron B. Woertz
Keyword(s):  
Ambient Temperature ◽  
Atmospheric Pressure ◽  
Pilot Plant ◽  
Temperature Inversion ◽  
Liquid Equilibrium ◽  
Vapor Liquid Equilibrium ◽  
K Value ◽  
Hydrocarbon Solvent ◽  
Multicomponent Gas ◽  
Solvent Systems

Abstract A new set of vapor-liquid equilibrium ratios (K-charts) is presented for methane through n-octane, nitrogen, CO2 and H2S, all in methyl cyanoacetate (MCA). The K-values for the hydrocarbons show a temperature inversion at pressures of 1,000 psia and above in that solubility in MCA increases with temperature. Nitrogen appears to exhibit temperature inversion at all pressures studied. Nitrogen, CO2 and methane were the only components in which the K-values did not increase at high pressure in the pressure ranges studied. At some temperatures K-values of ethane and propane also did not increase with pressure at high pressures. pressures Introduction Additional pilot plant data have recently been published on the use of methyl cyanoacetate (MCA) to published on the use of methyl cyanoacetate (MCA) to remove acid gases (CO2 and H2S) from highpressure natural gas. In that publication, K-values for the dissolved components, which had originally been published by the author in 1965, were omitted. Since published by the author in 1965, were omitted. Since 1965 additional equilibrium experiments have been made, resulting in some changes and in extension of the pressure range covered. Determinations of hydrocarbon K-values in hydrocarbon systems have been made elsewhere from time to time over a period of about 40 years, and information is still being developed. Thus, it seems appropriate that K-values of hydrocarbon-solvent systems be extended and modified as new data are obtained. The original K-value data were obtained from equilibrium experiments with MCA and a multicomponent mixture of CO2, methane, ethane, propane and n-butane. Some of the mixtures also propane and n-butane. Some of the mixtures also contained H2S. Compositions of the phases, resulting from flashing rich solvent in the pilot plant, were used with the previous data to estimate plant, were used with the previous data to estimate K-charts for nitrogen, i-butane, the pentanes, and all the K-values at low pressure. Thus, from the original equilibrium experiments (150 or 600 psia; and 0 degrees, 40 degrees or 70 degrees F) and the pilot plant flashing data, the original K-charts pilot plant flashing data, the original K-charts (Figs. 6 through 15, inclusive, in Ref. 2) were obtained. NEW K-VALUE EXPERIMENTS* The new data consist of the following:1. K-values calculated from atmospheric pressure solubility at either ambient temperature or 33 degrees F (Bunsen solubility).2. K-values determined at about 1,000 to 1,500 psia on multicomponent gas mixtures containing psia on multicomponent gas mixtures containing i-butane and n-pentane in addition to previously mentioned components. Also, measurements were made of the solubility of pure nitrogen or methane in MCA at these pressures.3. K-values at 2,000 psia for CO2, H2S and methane at 0 degrees or 100 degrees F.4. K-values calculated from chromatographic analysis of air in equilibrium with known mixture of MCA with benzene, toluene, or -xylene at atmospheric pressure and either ambient temperature or 33 degrees F.5. K-values for i-pentane, n-pentane, n-hexane, n-heptane and water calculated from liquid-liquid miscibility experiments at either ambient temperature or 33 degrees F. The method of (Galimberti and Campbell was used in smoothing and extrapolating the data. In this method, at constant system pressure and temperature, the log of the K-value of hydrocarbons is a linear function of (absolute critical temperature). This method was originally proposed for hydrocarbon systems, but also seems to work well on hydrocarbon-solvent systems. SPEJ P. 283

Static vapour-liquid equilibrium studies on {xC3H7NH2 + (1−x)C3H7OH}

1981 ◽  
Vol 13 (6) ◽  
pp. 557-562 ◽  
Author(s):  
E. Kristóf ◽  
I. Ország ◽  
F. Ratkovics
Keyword(s):  
Liquid Equilibrium ◽  
Equilibrium Studies

Liquid—liquid equilibrium studies on hydrocarbon (C10C20)—sulfolane systems

1990 ◽  
Vol 61 (1-2) ◽  
pp. 89-98 ◽  
Author(s):  
Asha Masohan ◽  
Srikant M. Nanoti ◽  
Krishan G. Sharma ◽  
Som N. Puri ◽  
Pushpa Gupta ◽  
...  
Keyword(s):  
Liquid Equilibrium ◽  
Equilibrium Studies

Thermodynamic and thermophysical properties of the reference ionic liquid: 1-Hexyl-3-methylimidazolium bis[(trifluoromethyl)sulfonyl]amide (including mixtures). Part 2. Critical evaluation and recommended property values (IUPAC Technical Report)

2009 ◽  
Vol 81 (5) ◽  
pp. 791-828 ◽  
Author(s):  
Robert D. Chirico ◽  
Vladimir Diky ◽  
Joseph W. Magee ◽  
Michael Frenkel ◽  
Kenneth N. Marsh
Keyword(s):  
Ionic Liquid ◽  
Property Values ◽  
Reference Sample ◽  
Critical Evaluation ◽  
Liquid Mixtures ◽  
Liquid Equilibrium ◽  
Equilibrium Studies ◽  
Technical Report ◽  
Gas Solubilities ◽  
Triple Point Temperature

This article is a product of IUPAC Project 2002-005-1-100 (Thermodynamics of ionic liquids, ionic liquid mixtures, and the development of standardized systems). Experimental results of thermodynamic, transport, and phase equilibrium studies made on a reference sample of the ionic liquid 1-hexyl-3-methylimidazolium bis[(trifluoromethyl)sulfonyl]amide are summarized, compared, and critically evaluated to provide recommended values with uncertainties for the properties measured. Properties measured included thermal properties (triple-point temperature, glass-transition temperature, enthalpy of fusion, heat capacities of condensed states), volumetric properties, speeds of sound, viscosities, electrolytic conductivities, relative permittivities, as well as properties for mixtures, such as gas solubilities (solubility pressures), solute activity coefficients at infinite dilution, and liquid-liquid equilibrium temperatures. Recommended values with uncertainties are provided for the properties studied experimentally. The effect of the presence of water on the property values is discussed.

scholarly journals Gas liquid equilibrium prediction of system (CO2-aqueous ethanol) at moderate pressure and different temperatures using PR-EOS

2013 ◽  
Vol 19 (3) ◽  
pp. 339-346 ◽  
Author(s):  
Jasim Hadi ◽  
Ghassan Hadi ◽  
Ghazi Najmuldeen ◽  
Iqbal Ahmed ◽  
Syed Hasany
Keyword(s):  
Chemical Engineering ◽  
Aqueous Ethanol ◽  
Critical Parameters ◽  
Mixing Rules ◽  
Moderate Pressure ◽  
Water Mixture ◽  
Liquid Equilibrium ◽  
Equilibrium Studies ◽  
Different Temperatures

One of the most important design considerations which should not be ignored during the equipment designing for some industrial purpose is vapour-liquid equilibrium (VLE). Thus, in chemical engineering, the first step is the computation of VLE properties of materials by employing Equation of state (EOS). In this study, we have used a thermodynamic model which was established for binary system of carbon dioxide (1)-(2) solubility of CO2 in aqueous ethanol and it was employed to estimate the gas-liquid equilibrium at moderate pressures (till 6 bar) and varying temperatures (288 K to 323 K). Peng-Robinson EOS was employed to determine the VLE properties. Mixing rules such as vanderWaals and quadratic mixing rules were also used for the determination of ethanol-water mixture critical parameters which entails the pseudo-critical method as one component and results obtained from this study were similar to the ones reported in recent literature for empirical phase equilibrium studies.

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