Thermodynamics of liquid methane+ethane

Azevedo, Edmundo Gomes de; Calado, Jorge C. G.

doi:10.1016/0378-3812(89)80003-2

Cited by 21 publications

(4 citation statements)

References 22 publications

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“…CH 4 -C 2 H 6 system Gomes de Azevedo and Calado (1989) 90-104 0.03-0.51 15 Wichterle and Kobayashi (1972a) 130-200 0.01-52 135 Davalos et al (1976) 250 13-66 8 Gupta et al (1980) 260-280 17-71 52 Wei et al (1995) 210-270 3-65 54 CH 4 -C 3 H 8 system Wichterle and Kobayashi (1972b) 130-213 2-65 105 Reamer et al (1950) 277-361 7-102 128 Akers et al (1954) 158-273 3-100 81 Sage et al (1934) 293-363 10-96 55 CH 4 -nC 4 H 10 system Sage et al (1940) 294-394 2-132 124 Roberts et al (1962) 211-411 2-132 83 Wiese et al (1970) 278-378 14-133 25 Chen et al (1974) 144-278 1-129 173 Kahre (1974) 166-283 1-110 71 CH 4 -CO 2 system Donnelly and Katz (1954) 200-271 11-79 110 Kaminishi et al (1968) 233-273 37-82 14 Arai et al (1971) 253-288 26-85 28 Davalos et al (1976) 230-270 9-86 34 Mraw et al (1978) 153-219 7-65 51 Neumann and Walch (1968) 173-220 27-69 64 Al-Sahhaf et al (1983) 219-270 9-84 32 Xu et al (1992) 288-293 57-82 21 Wei et al (1995) 230-270 11-84 49 H 2 O-CH 4 system at temperatures between 600 and 647.2 K (the critical temperature of water), but it is beyond the scope of this paper. Among the experimental data for the vapor-liquid equilibria of the H 2 O-C 2 H 6 system, the ethane solubility data measured by and the water content data measured by Reamer et al (1943) and Yarrison et al (2006) cover larger P-T range.…”

Section: T (K) P (Bar) Numbermentioning

confidence: 99%

Calculation of vapor–liquid equilibrium and PVTx properties of geological fluid system with SAFT-LJ EOS including multi-polar contribution. Part III. Extension to water–light hydrocarbons systems

Sun

Lai

Dubessy

2014

Geochimica et Cosmochimica Acta

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Section: T (K) P (Bar) Numbermentioning

confidence: 99%

Calculation of vapor–liquid equilibrium and PVTx properties of geological fluid system with SAFT-LJ EOS including multi-polar contribution. Part III. Extension to water–light hydrocarbons systems

Sun

Lai

Dubessy

2014

Geochimica et Cosmochimica Acta

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“…Methane + Ethane . The excellent quality of BACKONE for this mixture has already been shown 7 by comparison with experimental data for VLE isotherms, − densities in the homogeneous phases, and isochoric heat capacities . Figure shows a new comparison between the BACKONE results and the measurements of Grini et al for the isobaric enthalpy increments of methane + ethane for a temperature change from T 1 to T 2 .…”

Section: Thermodynamic Properties Of Mixturesmentioning

confidence: 51%

Accurate Thermodynamic Properties from the BACKONE Equation for the Processing of Natural Gas

Wendland¹,

Saleh²,

Fischer³

2004

Energy Fuels

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To optimize the processing of natural gas, accurate thermodynamic data are required. Here, we investigate the quality of the physically based BACKONE equation of state, which requires only 3-5 substance specific parameters for each pure component. For mixtures, only one mixture parameter for each binary and no ternary parameters are required. First, for 23 pure components (including ethylene, propylene, hydrogen sulfide, and water), the BACKONE parameters are given and the quality of the predictions for these 23 substances is described. Some characteristic results for properties such as vapor pressure, bubble and dew point density, as well as densities and caloric data, are presented. Second, for 21 key mixtures, the phase equilibria, densities, and caloric data are considered. Finally, we address liquefaction in three stages, considering vapor compression refrigeration cycles and isenthalpic expansion. By comparison with reference equations of state or experimental data, it turns out that, in all cases, the BACKONE equation yields good to excellent predictions of the thermodynamic properties not only for pure fluids but also for mixed natural gases and processing fluids. As a byproduct, we find better coefficients of performance for the first stage refrigeration cycle for n-butane and isobutane or their mixtures with propane as refrigerants, in comparison with pure propane. † Dedicated to Professor Friedrich Kohler, Ruhr-Universita ¨t Bochum, on the occasion of his 80th birthday.

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“…Excess Gibbs-energy model results of six mixtures at constant temperatures with model uncertainties calculated as the standard deviation between evaluations that differ in pseudo-random-number generator seed values for the sampling algorithm. The results are compared to experimental data for methane + ethane from Gomes de Azevedo and Calado,52 for tetrahydrofuran + furan and chloroform + tetrahydrofuran from Byer et al,53 and 1-propanol + 2-propanol from Haase and Tillmann 54. When available, the results are also compared to the UNIFAC model using the 2021 parameter set of the UNIFAC Consortium.55 Experimental data from which the experiment curves have been derived are provided in the Supporting Information, Figures S5−S7.…”

mentioning

confidence: 99%

Discrete Modeling Approach for Cluster-Based Excess Gibbs-Energy of Molecular Liquids

Mayer,

Wallek

2023

Ind. Eng. Chem. Res.

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The excess Gibbs-energy of a two-component liquid molecular mixture is modeled based on discrete clusters of molecules. These clusters preserve the three-dimensional geometric information about local molecule neighborhoods that inform the interaction energies of the clusters. In terms of a discrete Markov-chain, the clusters are used to hypothetically construct the mixture using sequential insertion steps. Each insertion step and, therefore, cluster is assigned a probability of occurring in an equilibrium system that is determined via the constrained minimization of the Helmholtz free energy. For this, informational Shannon entropy based on these probabilities is used synonymously with thermodynamic entropy. A first approach for coupling the model to real molecules is introduced in the form of a molecular sampling algorithm, which utilizes a force-field approach to determine the energetic interactions within a cluster. An exemplary application to four mixtures shows promising results regarding the description of a variety of excess Gibbs-energy curves, including the ability to distinguish between structural isomers.

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Thermodynamics of liquid methane+ethane

Cited by 21 publications

References 22 publications

Calculation of vapor–liquid equilibrium and PVTx properties of geological fluid system with SAFT-LJ EOS including multi-polar contribution. Part III. Extension to water–light hydrocarbons systems

Calculation of vapor–liquid equilibrium and PVTx properties of geological fluid system with SAFT-LJ EOS including multi-polar contribution. Part III. Extension to water–light hydrocarbons systems

Accurate Thermodynamic Properties from the BACKONE Equation for the Processing of Natural Gas

Discrete Modeling Approach for Cluster-Based Excess Gibbs-Energy of Molecular Liquids

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