A Method for Determining the Solubility of Gases in Relatively Nonvolatile Liquids:  Solubility of Methane in <i>n</i>-Decane.

Koonce, K. Terry; Kobayashi, Riki

doi:10.1021/je60023a004

Cited by 34 publications

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“…The methane-n-decane systems were reported by Stalkup et al ( 1 7 ) and also studied by Koonce and Kobayashi ( 7 ) . Koonce et al (8) reported vapor-liquid equilibria data on the ternary methane-propane-n-decane and the methanepropane-n-heptane systems in 1965.…”

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confidence: 80%

Vapor‐liquid equilibria of light hydrocarbons at low temperatures and high pressures: The methane‐n‐heptane system

1966

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Recent experimental observations of the phase behavior of methane-n-paraffin hydrocarbon binary systems are used to make a phase rule analysis of such systems. The vapor-liquid equilibria of light hydrocarbon systems are complicated by liquid-liquid immiscibility and solids formation at low temperatures.The system studied here has limited liquid phase miscibility with a quadruple point involving o gas phase, two liquid phases, and a solid phase.Experimental techniques were developed to sample and analyze gas phases containing concentrations of n-heptane in the range of 0.00001 mole fraction with good precision. Binary K values for methane and n-heptane are reported at intervals of 20°F. from 0" to -100°F. for pressures up to the criticals for the mixtures. The results are reported numerically and illustrated graphically. Additional phase observations were made below the critical temperature of methane to confirm and extend the phase behavior of the methane-n-heptane system as reported by Kohn.Since the review of the vapor-liquid equilibria of light hydrocarbons at low temperatures by Price and Kobayashi ( 1 2 ) , studies on the phase behavior of the methane-nhexane ( 4 ) , methane-n-heptane ( 5 ) , and methane-noctane (6) systems by Kohn and co-workers have appeared. The methane-n-decane systems were reported by Stalkup et al. ( 1 7 ) and also studied by Koonce and Kobayashi ( 7 ) . Koonce et al. (8) reported vapor-liquid equilibria data on the ternary methane-propane-n-decane and the methanepropane-n-heptane systems in 1965. GENERAL DISCUSSION OF PHASE BEHAVIOR IN METHANE-n-PARAFFIN HYDROCARBON BINARIESThe experimental results reported by Kohn (5, 6) and by Stalkup and Kobayashi ( I 7 ) and in this paper indicate that the binary pha* behavior of methane with other nparaffin hydrocarbons through n-decane offers at least three types of phase behavior:1. S stems in which the critical locus runs continuously higher boiling constituent with complete liquid phase miscibility.2. Systems in which the critical locus runs from the critical of the higher boiling constituent to a liquid-liquid from t E e critical of pure methane to the critical of the Lewis J. Hurt is at Rohm and Haas Company, Huntsville, Alabama.critical locus occurring at a temperature below the critical temperature of pure methane and at a pressure considerably in excess of the critical for pure methane; that is, when a liquid-liquid-solid-gas quadruple point occurs in the binary system.3. Systems in which the critical locus starting from the critical of the heavier component is severed by the intrusion of the solid-liquid-gas phase relationship upon the vapor-liquid equilibrium region, giving a second critical locus which extends from the critical point of pure methane to a gas-liquid critical point with solids present.These three types of systems are exemplified by the pressure-temperature projection of the methane-propane, methane-n-heptane, and methane-n-decane systems, respectively, as shown in Figures 1, 2, and 3.It has been verified experimental...

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confidence: 80%

Vapor‐liquid equilibria of light hydrocarbons at low temperatures and high pressures: The methane‐n‐heptane system

1966

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“…Since the concentration at the boundary corresponds to the locally equilibrated solution, equilibrium molar fractions of methane in the solutions were calculated ( Table 2 ). The equilibrium solubilities compared well with the available literature data for ethanol [ 6 – 8 ] and n -decane [ 12 , 15 ]. The influence of temperature on the equilibrium solubility and on the diffusivity followed the expected order.…”

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confidence: 60%

“…n-decane is a model constituent of crude oil. Literature data on the methane solubility and diffusivity and on surface tension are available either for n-decane and methane or for similar systems under high pressures [9][10][11][12][13][14][15][16][17][18]. Clearly, mixtures of a light gas with a heavy solvent are relevant for the production and processing of crude oil and natural gas [19,20].…”

Section: Introductionmentioning

confidence: 99%

One-pot neutron imaging of surface phenomena, swelling and diffusion during methane absorption in ethanol and n-decane under high pressure

et al. 2020

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We report a powerful method for capturing the time-resolved concentration profiles, liquid swelling and surface phenomena during the absorption of methane (CH 4) in still liquid ethanol (C 2 D 6 O) and n-decane (n-C 10 D 22) and at high spatial resolution (pixel size 21.07 μm) using neutron imaging. Absorption of supercritical methane was followed at two temperatures and two pressures of methane, namely 7.0, 37.8˚C and 80, 120 bar. Fick's second law, which was used in the liquid-fixed coordinates, enabled for an adequate parameterization of the observed concentration profiles and liquid levels using simple analytical expressions. For both studied liquids, anomalously slow diffusion was observed in the initial stage of the absorption experiment. This was ascribed to the slow formation of the surface excess on the interface, time constant ranged 130-275 s. The axial symmetry of the cell allowed for the tomographic reconstructions of the profiles of the menisci. Based on these profiles, contact angle and surface tension were evaluated using the Young-Laplace equation. Overall, neutron imaging made it possible to capture time-and space-resolved information from which the methane concentration, liquid level and meniscus shape under high-pressure conditions inside a cylindrical titanium vessel were quantitatively derived. Multiple characteristics of ethanol, a methane hydrate inhibitor, and n-decane, a model constituent of crude oil, were thus measured for the first time under industrially relevant conditions in a one-pot experiment.

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“…Pressure – composition VLE for the CH 4 ‐ n ‐C 10 H 22 mixture at various temperatures; (a) T = 244.26 K, (b) T = 310.93 K, (c) T = 450 K, (d) T = 583.05 K. Experimental data are represented by black data points. GEMC simulation data are represented by red data points.…”

Section: Resultsmentioning

confidence: 99%

Modeling the phase equilibria of asymmetric hydrocarbon mixtures using molecular simulation and equations of state

et al. 2018

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Monte Carlo simulation (MC) is combined with equations of state (EoS) to develop a methodology for the calculation of the vapor–liquid equilibrium (VLE) of multicomponent hydrocarbon mixtures with high asymmetry. MC simulations are used for the calculation of the VLE of binary methane mixtures with long n‐alkanes, for a wide range of temperatures and pressures, to obtain sufficient VLE data for the consistent fitting of binary interaction parameters (BIPs) for the EoS. The Soave‐Redlich‐Kwong (SRK), Peng‐Robinson (PR), and Perturbed Chain ‐ Statistical Associating Fluid Theory (PC‐SAFT) EoS are considered. The ability of each EoS to correlate the VLE data is assessed and the selected ones are used to predict the VLE of multicomponent gas condensate mixtures. MC simulations proved to be very accurate in predicting the VLE in all conditions and mixtures considered. The BIPs regressed from the simulation dataset lead to equally accurate modeling results for multicomponent mixtures, compared to those regressed from experimental data. © 2018 American Institute of Chemical Engineers AIChE J, 65: 792–803, 2019

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A Method for Determining the Solubility of Gases in Relatively Nonvolatile Liquids: Solubility of Methane in n-Decane.

Abstract: Vapor Press., Torr. 1.50 xlO"6 5.16 xlO"6 2.32x10"* 6.37x10"* 1.90 xlO"3 5.46 xlO"3 2.91 xlO"2 5.56 x 10"2 0.108

Cited by 34 publications

References 1 publication

Vapor‐liquid equilibria of light hydrocarbons at low temperatures and high pressures: The methane‐n‐heptane system

Vapor‐liquid equilibria of light hydrocarbons at low temperatures and high pressures: The methane‐n‐heptane system

One-pot neutron imaging of surface phenomena, swelling and diffusion during methane absorption in ethanol and n-decane under high pressure

Modeling the phase equilibria of asymmetric hydrocarbon mixtures using molecular simulation and equations of state

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