Virial equation of state for natural gas systems

Estela-Uribe, Jorge F.; Jaramillo, Juan Carlos; Salazar, Mariana; Trusler, J. P. Martin

doi:10.1016/s0378-3812(02)00264-9

Cited by 20 publications

(19 citation statements)

References 31 publications

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“…The generalised shape-factor correlations of references [13,14] do have some limitations and, in order to obtain improved accuracy, we developed alternative substance specific parameters for key components of natural gases [1]. The results reported in our preceding paper [1] show that the ECS model represents a distinct improvement over a previous shape-factor correlation [5]; indeed, some of the results are comparable in accuracy to those obtained with modern reference equations of state.…”

Section: Introductionmentioning

confidence: 93%

“…The acentric factors ω were also treated as adjustable coefficients. For convenience, we give the values of these parameters for 11 pure components and also a set of generalised parameters [13,14]. These generalised parameters are useful for minor components of natural gases, such as i-C 5 H 12 and n-C 6 H 14 .…”

Section: Ecs Modelmentioning

confidence: 99%

“…The data of Younglove et al [21] were used for the systems (CH 4 + C 2 H 6 ), (CH 4 + C 3 H 8 ), (CH 4 + N 2 ), (CH 4 + CO 2 ) and (N 2 + CO 2 ). The data by Trusler [22] and Trusler and Costa-Gomes [23] were used for the system (CH 4 + C 2 H 6 ); the data by Trusler et al [24] were used for the system (CH 4 + C 3 H 8 ) and the data by Estela-Uribe [13] were used for the mixtures Table 2 Coefficients of binary interaction parameter correlations of Model ECSmixS1 …”

Section: Ecs Modelmentioning

confidence: 99%

“…Initially, Estela-Uribe and Trusler [12] examined, for the light hydrocarbons, the numerical behaviour of shape factors calculated from accurate volumetric data. The observed behaviour motivated Estela-Uribe [13] to propose new correlating equations for the shape factors which were used as the basis for a generalised EoS for natural gas systems [13,14]. The ECS model of references [13,14] is based on methane as the reference fluid and uses the reference EoS of Setzmann and Wagner [15] which offers a highly-accurate representation of the thermodynamic properties from the melting line up to 625 K and at pressures up to 1000 MPa.…”

Section: Introductionmentioning

confidence: 99%

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Extended corresponding states model for fluids and fluid mixtures

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Section: Introductionmentioning

confidence: 93%

Section: Ecs Modelmentioning

confidence: 99%

Section: Ecs Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Extended corresponding states model for fluids and fluid mixtures

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Mendoza

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2004

Fluid Phase Equilibria

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“…Coefficients of temperature correlation for interaction second Virial coefficients fitted to binary-mixture compression factors(Estela- Uribe et al 2003) …”

mentioning

confidence: 99%

Investigation of hydrogen and methane adsorption/separation on silicon nanotubes: a hierarchical multiscale method from quantum mechanics to molecular simulation

et al. 2011

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A combination of ab initio quantum mechanical (QM) calculations and canonical Monte Carlo (CMC) simulations are employed to investigate possible usage of singlewalled silicon nanotubes (SWSiNTs) as a novel media for hydrogen and methane adsorption as well as their separation from each other. By fitting the force field, a Morse potential model is selected as an efficient potential to describe the binding energies between both hydrogen-SiNTs and methane-SiNTs obtained from ab initio calculations. Then CMC simulations are performed to evaluate the adsorption and separation behaviors of H 2 and CH 4 on the three different sizes of SiNTs including (5, 5), (7, 7), and (9, 9) SiNTs at ambient temperatures and pressures from 1 up to 10 MPa. As a comparison, the adsorption and separation of H 2 and CH 4 on the (8, 8) CNTs which are isodiameter with (5, 5) SiNTs are also simulated. Results are indicative of remarkable enhancement of H 2 and CH 4 adsorption capacity on the SiNTs compared to the CNTs, which arise from stronger van der Waals (VDW) attractions. In the case of methane adsorption on SiNTs, the stored volumetric energy exceeds the goal of the US Freedom CAR Partnership by 2010, which can not be achieved by methane compression at such low pressures. Moreover, simulation results indicate that SiNTs preferentially adsorb methane relative to hydrogen in their equimolar mixture, which re-S. Balilehvand · S.M. Hashemianzadeh ( ) · S. Razavi ·

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Equation of state for gaseous nitrogen determined from isotropic model potentials

Monago¹

2010

Can J Chem Eng

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A four-term virial equation of state was combined with isotropic potential models to predict accurate volumetric and caloric thermodynamic properties of nitrogen in the gas phase. The parameters of the model potentials were determined from a fit to acoustic data alone; no other data was used. For nitrogen, it was only necessary to approximate the fourth virial coefficient at the level of interactions that contained no more than one triplet potential; higher order approximations offered no further advantage. It was shown that the four-term virial equation was more accurate than the three-term analogue. It was found that predicted virial coefficients became consistent with experimental values when temperature was >150 ± 30 K; conversely, below this range virial coefficients predicted by the model did not agree with experiment. It was believed that predicted fourth virial coefficient was reliable and accurate only above about 150 K. Predicted compressibility factors deviated by <0.05% at pressures of up to 10-12 MPa, or densities up to 4 mol/dm 3 (≈0.4 c ), only when temperature was >220 K. Values of enthalpy predicted from the equation of state showed good agreement with experimental data.Uneéquation d'état virialeà quatre termes aété combinée avec des modèles de potentiel isotropique afin de prédire avec précision les propriétés volumétriques et caloriques thermodynamiques de l'azote en phase gazeuse. Les paramètres des potentiels de modèle ontété déterminésà partir d'une adaptation unique aux données acoustiques. Aucune autre donnée n'aété utilisée. Pour l'azote, il est seulement nécessaire d'approximer le quatrième coefficient virial au niveau des interactions qui ne contiennent pas plus d'un potentiel de triplet; les approximations d'ordre supérieur n'offrent pas d'avantages supplémentaires. On a montré que l'équation virialeà quatre termes est plus précise que l'analogueà trois termes. Il aété conclu que les coefficients viriaux prédits correspondaientà 30 K. Réciproquement, les valeurs expérimentales correspondantà une température de plus de 150 en-dessous des coefficients viriaux de cet intervalle prédits par le modèles ne sont pas en accord avec l expérimentation. Je considère que le quatrième coefficient virial prédit n'est fiable et précis qu'au-dessus d'environ 150 K. Les facteurs de compressibilité prédits dévient de moins de 0,05 pour centà des pressions pouvant atteindre jusqu'à 10-12 MPa ou des densités pouvant atteindre jusqu'à 4 c), seulement lorsque la température est supérieureà 220 K. Les valeurs de 0,4 ≈ mol/dm3 (l enthalpie préditeà partir de l équation d'état montraient une bonne correspondance avec les données expérimentales.

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Virial equation of state for natural gas systems

Cited by 20 publications

References 31 publications

Extended corresponding states model for fluids and fluid mixtures

Extended corresponding states model for fluids and fluid mixtures

Investigation of hydrogen and methane adsorption/separation on silicon nanotubes: a hierarchical multiscale method from quantum mechanics to molecular simulation

Equation of state for gaseous nitrogen determined from isotropic model potentials

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