Showing papers in "Journal of Chemical & Engineering Data in 1989"

Physicochemical properties important for carbon dioxide absorption in aqueous methyldiethanolamine

Abstract: The objective of thls work Is to experimentally determlne the diffusion coefflclent and freegas solubllity of carbon dloxlde In aqueous methyldlethanolamlne (MDEA). Solutlon vlscoslty and density were also measured. Experiments covered the concentratlon range 0-50 wt % MDEA for temperatures between 15 and 50 OC. Slrce the solubllity and dlffuslvlty of a gas cannot be meawed directly In a system In which A reacts, the N20 analogy method was used In thls work to estimate these propertles for the system C0,-aqueous MDEA solutlons. SolubllAles were measured volumetrlcally In an equlllbrlum cell, and dlffuslon coefflclents were measured In a lamlnar liquid jet absorber for low MDEA concentratlons and a wetted-sphere absorber for hlgh MDEA concentrations. Properties were correlated by convenlent equations which were found to be In excellent agreement with the experlmental data.

Solubilities of carbon dioxide in water and 1 wt. % sodium chloride solution at pressures up to 10 MPa and temperatures from 80 to 200.degree.C

Abstract: Un modele thermodynamique des melanges binaires du titre est presente. Le modele emploie l'equation d'etat de Peng-Robinson pour representer la phase vapeur et une correlation empirique de la constante de la loi d'Henry pour la phase liquide. Description d'un nouvel appareil utilisant une nouvelle technique pour une elimination d'echantillons liquides

Estimation procedures for critical constants

Abstract: Determination des points critiques pour des series homologues. De nouvelles procedures sont proposees en termes d'indices de groupements fonctionnels

The vapor pressure of n-alkanes revisited. New high-precision vapor pressure data on n-decane, n-eicosane, and n-octacosane

Abstract: The authors report new vapor pressure measurements on n-decane (268-490{Kappa}), n-eicosane (388-626{Kappa}), and n-octacosane (453-575{Kappa}) made with a modified ebulliometer and an inclined piston gauge. Benzene and water were the standards in the ebulliometric measurements on n-decane and n-eicosane, while n-decane was the standard for the measurements on n-octacosane. The high-quality data for n-decane, which were confirmed by a third-law'' analysis, suggest that reported literature data are in error. Similar concerns are raised about reported n-eicosane data. The vapor pressure data were regressed with the Cox equation, using as reference the normal boiling point.

Viscosity of pure hydrocarbons

Abstract: Accurate viscosity measurements have been performed on eight pure hydrocarbons at atmospheric pressure in the temperature range 20-150/sup 0/C, or up to approximately 20/sup 0/C below the boiling point of the hydrocarbon, by use of an absolute oscillating viscometer. The hydrocarbons are cyclohexane and benzene and the n-alkanes of hexane, heptane, octane, decane, dodecane, and tetradecane. The viscosities are described with a modified Arrhenius equation, and the deviation in fit is 0.12% or less. The accuracy is estimated to be 0.33-0.56%. The lowest viscosities are assumed to have the highest deviation. Literature data reported by Dymond and Young normally fit our viscosities within our estimated accuracy. Other literature viscosities tend to be higher than our results, especially for the n-alkanes.

VAPOR-LIQUID EQUILIBRIUM IN THE SYSTEM CARBON DIOXIDE/ISO-PENTANE FROM 253 TO 443 K AT PRESSURES UP TO 10 MPa

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.

High-pressure vapor-liquid equilibria involving mixtures of nitrogen, carbon dioxide, and n-butane

Abstract: A new high-pressure vapor-liquid equilibrium apparatus has been constructed with the capability of measuring the compositions and densities of the coexisting equilibrium phases at constant temperature and/or pressure. This apparatus was tested with the carbon dioxide + n-butane system with excellent agreement observed between our results and previously published data. Data are also reported for the nitrogen + n-butane system and the previously unmeasured nitrogen + carbon dioxide + n-butane system. These data were modeled with the Peng-Robinson equation of state. Excellent fits were obtained for the compositions in the carbon dioxide + n-butane system, but a poor fit was obtained for the nitrogen + n-butane data. The ability of the Peng-Robinson equation of state to accurately predict the phase behavior of the ternary mixture is dependent on the fits of the binary data, and therefore the ternary data are also not fit well. In all cases the liquid densities are poorly predicted with the Peng-Robinson equation of state.

High-pressure binary phase equilibria of aromatic hydrocarbons with CO2 and C2H6

Abstract: L'equilibre liquide-vapeur a haute pression de sept systemes binaires contenant des hydrocarbures aromatiques (anisole, benzaldehyde, tetraline, methyl-1 naphtalene) et du dioxyde de carbone ou de l'ethane est examine afin de determiner les compositions des phases et les masses volumiques

High-pressure vapor-liquid equilibria of mixtures of nitrogen, carbon dioxide, and cyclohexane

Abstract: Data are reported for the equilibrium phase compositions and densities of the carbon dioxide + cyclohexane and the nitrogen + cyclohexane systems at 366.5 and 410.9 K and for the nitrogen + carbon dioxide + cyclohexane system at the same temperatures at a variety of Isobars. These data were modeled with the Peng-Robinson equation of state with generalized parameters. Good fits were obtained for the compositions in all three systems, but the predicted liquid-phase densities were in error by about 5%, as expected.

Simple apparatus for vapor-liquid equilibrium measurements with data for the binary systems of carbon dioxide with n-butane and isobutane

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}

Liquid-liquid equilibria of the system water + acetic acid + methyl isopropyl ketone between 25 and 55.degree.C

Abstract: La solubilite du melange binaire {eau+methyl isopropyl cetone} ainsi que l'equilibre liquide-liquide du systeme ternaire {eau+acide acetique+methyl isopropyl cetone} sont mesures entre 20 et 55˚C. Les resultats experimentaux sont ajustes avec les modeles NRTL, UNIQUAC et UNIFAC

Densities and viscosities of binary mixtures of 1-propanol and 2-propanol with acetonitrile

Abstract: Les masses volumiques et les viscosites des deux melanges binaires sont mesurees a 20, 30, 40 et 50˚C. Les volumes melanges d'exces sont calcules a partir des masses volumiques

Temperature and concentration dependence of viscosity of aqueous electrolytes from 20.degree.C to 50.degree.C chlorides of (sodium(1+), potassium(1+), magnesium(2+), calcium(2+), barium(2+), strontium(2+), cobalt(2+), nickel(2+), copper(2+) and chromium(3+)

Abstract: Evaluation des coefficients d'interaction ion solvant entre 0.1 et 5 M pour des solutions d'halogenures de metaux alcalins, de metaux alcalinoterreux et de metaux de transition. Etude de la viscosite en fonction de la concentration a differentes temperatures (20, 25, 30, 35, 40, 45, 50°C)

Equilibrium adsorption of methane, ethane, ethylene, and propylene and their mixtures on activated carbon

Abstract: The authors discuss pure gas adsorption isotherms of methane, ethane, ethylene, and propylene on activated carbon determined at 323{Kappa} and pressures in the range 0-100 kPa. Binary and ternary adsorption isotherms were also determined at the same temperature and pressures for all the mixtures of these adsorbates, with the exception of methane-propylene mixtures due to their difference in adsorption capacity. Two models have been applied for correlation and prediction of mixture adsorption equilibria-the ideal adsorbed solution (IAS) and the real adsorbed solution (RAS). This second model provides better results for all the systems.

Vapor-liquid equilibrium in the binary system carbon dioxide + n-butane

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

Solubilities of ethane in heavy normal paraffins at pressures to 7.8 MPa and temperatures from 348 to 423 K

Abstract: The authors present solubility data obtained for ethane in the heavy normal paraffin solvents n-eicosane, n-octacosane, n-hexatriacontane, and n-tetratetracontane. Measurements were made over the temperature range from 348 to 423{Kappa} (167-302 {sup 0}F) at pressures up to 7.8 MPa (1127 psia). The data can be described with average deviations of less than 0.003 mole fraction by the Soave-Redlich-Kwong or Peng-Robinson equation when two interaction parameters per isotherm are used in the equation.

Naphthalene solubility in selected organic solvent/water mixtures

Abstract: (1) Ashcroft, S. J.; Clayton, A. D.; Shearon, R. B. J . Chem. Eng. Data 1082, 27, 148. (2) De Fre, R. M.; Verhoeye, L. A. J . Appl. Chem. Blotechnol. 1078, 26(9), 469. (3) Hassan, M. S.; Fahlm, M. A,; Mumford, J. D. J . Chem. fng. Data 1088, 33, 162. (4) Tripathl, R. P.; Raja, R. A,; Bhimeshwara, R. P. J . Chem. Eng. Data 1075,20,3. (5) Wilson. G. M. J . Am. Chem. Soc. 1084, 66. 133. (6) Renon, H.; Prausnitz, J. M. AIGhE J . 1088. 74, 135. (7) Abrams, D. C.; Prausnitz, J. M. AICh€J. 1075. 21, 116. (8) Reid, R. C.; Prausnitz, J. M.; Shewood, T. K. The Ropeftles of Gases and Liquids, 3rd ed.; McGraw-Hill: New York, 1977; Chapter 8. (9) Rawat, B. S.; Gulati, I . B. J . Appl. Chem. Blotechnol. 1978. 26, 425. (10) HiMerbrand, J. H.; Scott, R. L. Regular Solutions; Prentice-Hall. Englewood Cliffs, NJ, 1962. (11) Pierott, G. J.; Deal, C. H.; Derr, E. J. I n d . Eng. Chem. 1050, 57, 95. (12) Derr, E. L.; Deal, C. H. Inst. Chem. fng . Symp. Ser. 1080, 32(3), 37. (13) Fredenslund, A.; Jones, R. I.; Prausnb, J. M. AIChE J . 1075, 27, 1086. (14) Tochigi, K.; Kojima, K. J . Chem. Eng. Jpn. 1077, 70(1), 61. (15) Guggenheim. E. A. M/xfufes; Clarendon Press: Oxford, 1952. (16) Sorensen, J. M.; Ark, W. Llquid-Liquid Equilibrium Data Collection; Dechema Chemistry Data Series; DECHEMA: Frankfurt, 1980. Glossary

Dynamic viscosity of mixtures of benzene, ethanol, and n-heptane at 298.15 K

Abstract: Experimental dynamic viscosities and densities are reported for the binary and ternary mixtures of benzene, ethanol, and n-heptane at 25 {sup 0}C. The data are correlated with the generalized corresponding states method of Teja and Rice by treating the ternary system as pseudobinary and by using only binary information. A van Laar type mixing rule is used for the pseudocritical temperature of the binary mixtures. Experimental and calculated viscosities for the ternary system are in satisfactory agreement.

Measurement of .gamma..infin. using gas-liquid chromatography. 3. Results for the stationary phases 10-nonadecanone, N-formylmorpholine, 1-pentanol, m-xylene, and toluene

Abstract: Mesures des coefficients d'activite a dilution infinie des quatre phases stationnaires mentionnees dans le titre. Determination des proprietes physiques et des volumes de retention pour chaque compose

Partial miscibility behavior of the methane + ethane + n-docosane and the methane + ethane + n-tetradecylbenzene ternary mixtures

Abstract: Les compositions des phases, liquides et vapeur et les volumes molaires sont etudies a l'aide d'une relation fonction de la temperature et de la pression

Vapor-liquid equilibrium measurements for methyl propanoate-ethanol and methyl propanoate-propan-1-ol at 101. 32 kPa

Abstract: Isobaric vapor-liquid equilibrium measurements on binary systems of methyl propanoate with ethanol and propan-1-ol are taken at a constant pressure of 101.32 +- 0.02 kPa. These systems exhibit significant deviations from ideality and are shown to be thermodynamically consistent. The methyl propanoate-ethanol system forms an azeotrope at x = y = 0.483 and T = 345.58{Kappa}. Experimental data are fitted to a suitable equation and are likewise compared with the values predicted by the UNIFAC and ASOG models.

Equilibrium phase properties of the n-butane-hydrogen sulfide and isobutane-hydrogen sulfide 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

Solubility and density isotherms for potassium sulfate-water-2-propanol

Abstract: La solubilite du sulfate de potassium dans l'eau et dans une solution aqueuse de propanol-2 est determinee entre 20 et 50°C

Correlation of the phase equilibrium data for the heptane-toluene-sulfolane and heptane-xylene-sulfolane systems

Abstract: Liquid-liquid equilibrium data were measured for the heptane-toluene-sulfolane system at 25{sup 0}C and for the heptane-xylene-sulfolane system at 17, 25, and 50{sup 0}C. The NRTL and UNIQUAC equations are used to correlate the experimental data and to predict the phase compositions of the ternary systems. The agreement between the predicted and the experimental results was equally good with both equations.

Vapor-liquid equilibrium of 1,3-dioxolane systems

Abstract: Etude des equilibres de phase pour des systemes binaires comprenant du dioxolanne-1,3 et un des composes suivants: cyclohexane, heptane, eau, ethanol, chloroforme