Extension of the E-PPR78 equation of state to predict fluid phase equilibria of natural gases containing carbon monoxide, helium-4 and argon

Plee, Vincent; Jaubert, Jean‐Noël; Privat, Romain; Arpentinier, Philippe

doi:10.1016/j.petrol.2015.03.025

Cited by 31 publications

(22 citation statements)

References 145 publications

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“…In the last ten years, the PPR78 (Predictive 1978, Peng-Robinson equation of state) model, which was originally proposed by Jaubert and co-workers [15], has been shown to be accurate and reliable for the prediction of the phase-equilibrium behavior of mixtures containing hydrocarbons [15][16][17][18], permanent gases [19][20][21][22][23][24][25], sulfur compounds [26][27][28], water [29], esters [30][31][32] and even some refrigerants like the R1234yf and the R1234ze [33]. The PPR78 model has been also successfully applied to phase-envelope prediction of petroleum fluids [34][35][36].…”

Section: Introductionmentioning

confidence: 99%

Fluid-phase-equilibrium prediction of fluorocompound-containing binary systems with the predictive E -PPR78 model

Qian

Privat

Jaubert

et al. 2017

International Journal of Refrigeration

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In order to reduce the overall emissions of greenhouse gases and to be in compliance with the current environmental regulations, a new class of refrigerants, making use of fluorocompounds has appeared. Such refrigerants are often blends of alkanes, CO 2 and fluorocompounds. Consequently an equation of state (EoS) able to predict the properties of both pure compounds and multi-component systems is required to design processes involving fluorocompounds or to implement a product-design approach aimed at identifying new refrigerant mixtures. It is however well-acknowledged that the phase behavior of binary systems like, e.g., an alkane and its corresponding perfluoroalkane, show significant deviations from ideality that need to be accurately accounted for by a thermodynamic model. In this study, in order to get a predictive model applicable to fluorocompound-containing binary systems, six groups were added to the Enhanced-PPR78 model which combines the Peng-Robinson EoS and a group contribution method aimed at estimating the binary interaction parameters, () ij kT, involved in Van der Waals one-fluid mixing rules.

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Section: Introductionmentioning

confidence: 99%

Fluid-phase-equilibrium prediction of fluorocompound-containing binary systems with the predictive E -PPR78 model

Qian

Privat

Jaubert

et al. 2017

International Journal of Refrigeration

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“…substituted with an "effective" critical temperature; 16,17 (2) those with novel temperature-dependent functions in the attractive term of the equation of state; 32−34 (3) those with novel mixing terms; 35 and (4) those with temperaturedependent binary interaction parameters. 15,36,37 In this work, category (1) has been considered: temperaturedependent, effective critical constants have been introduced, with which the properties of quantum gases can be made to coincide with those for classical gases.…”

Section: Extension To He-containing Mixturesmentioning

confidence: 99%

“…The Peng−Robinson 14 (PR) equation of state has been selected for this purpose and is regarded as particularly suitable for the system under investigation. 15 In the application of the fugacity equations for liquid and vapor phases, specific attention is required in the definition of helium critical parameters: as a quantum gas, the corresponding state approach is not adequate to describe its properties, which are determined on the basis of modified temperaturedependent effective critical constants. 16,17 The study of the solid−liquid−vapor equilibrium (SLVE) for CH 4 −N 2 −He−CO 2 mixtures enables the detection of the possible coexistence of solid CO 2 with the liquid and vapor phases naturally involved in the distillation process.…”

Section: Introductionmentioning

confidence: 99%

Solid–Liquid–Vapor Equilibrium Prediction for Typical Helium-Bearing Natural Gas Mixtures

Spatolisano

Pellegrini

2021

J. Chem. Eng. Data

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Industrial, large-scale helium recovery from natural gas is typically performed though cryogenic distillation. These technologies need a deep knowledge of the thermodynamics of the treated mixture: in the case of natural gas to a pipeline, CO 2 present in the feed stream might freeze at the process operating temperatures. The aim of this work is to analyze the thermodynamic behavior of the four-component mixture CH 4 −N 2 −He− CO 2 to predict its triphasic solid−liquid−vapor equilibrium (SLVE). Through a developed computational method based on the classical approach, the nitrogen and helium effect on CO 2 solidification has been assessed. The investigated conditions are consistent with typical cryogenic procesthesing temperatures (i.e., 100−200 K) and natural gas compositions. Pressure−temperature and temperature−composition equilibrium loci are provided for each analyzed case, varying the N 2 and He content in mixture. Helium behavior as a quantum gas has been considered by introducing temperature-dependent critical parameters, as suggested by Prausnitz and co-workers, valid for an acentric factor equal to zero. Referring to the proposed thermodynamic modeling, the risk of CO 2 freezing within a cryogenic helium recovery plant can be avoided by carefully managing the process operating conditions.

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“…where indexes l and k run over the groups, ng is the number of groups, a ik is the fraction of molecule i occupied by group k and A kl and B kl are the interaction parameters between groups k and l. The interaction parameters between groups were found in a series of work [31][32][33][34][35] and can be found in a complete form in [51]. While Equation (4) was derived for the PR78 EoS, the authors outlined how to apply it to the NB [48] and SRK EoS [27].…”

Section: Equations Of Statementioning

confidence: 99%

Equations of State with Group Contribution Binary Interaction Parameters for Calculation of Two-Phase Envelopes for Synthetic and Real Natural Gas Mixtures with Heavy Fractions

Nasrifar

Rahmanian

2018

Oil & Gas Science and Technology - Rev. IFP Energies nouvel

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Three equations of state with a group contribution model for binary interaction parameters were employed to calculate the vapor-liquid equilibria of synthetic and real natural gas mixtures with heavy fractions. In order to estimate the binary interaction parameters, critical temperatures, critical pressures and acentric factors of binary constituents of the mixture are required. The binary interaction parameter model also accounts for temperature. To perform phase equilibrium calculations, the heavy fractions were first discretized into 12 Single Carbon Numbers (SCN) using generalized molecular weights. Then, using the generalized molecular weights and specific gravities, the SCN were characterized. Afterwards, phase equilibrium calculations were performed employing a set of (nc + 1) equations where nc stands for the number of known components plus 12 SCN. The equations were solved iteratively using Newton's method. Predictions indicate that the use of binary interaction parameters for highly sour natural gas mixtures is quite important and must not be avoided. For sweet natural gas mixtures, the use of binary interaction parameters is less remarkable, however.

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Extension of the E-PPR78 equation of state to predict fluid phase equilibria of natural gases containing carbon monoxide, helium-4 and argon

Cited by 31 publications

References 145 publications

Fluid-phase-equilibrium prediction of fluorocompound-containing binary systems with the predictive E -PPR78 model

Fluid-phase-equilibrium prediction of fluorocompound-containing binary systems with the predictive E -PPR78 model

Solid–Liquid–Vapor Equilibrium Prediction for Typical Helium-Bearing Natural Gas Mixtures

Equations of State with Group Contribution Binary Interaction Parameters for Calculation of Two-Phase Envelopes for Synthetic and Real Natural Gas Mixtures with Heavy Fractions

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