A consistent method for phase equilibrium calculation using the Sanchez–Lacombe lattice–fluid equation-of-state

Neau, Evelyne

doi:10.1016/s0378-3812(02)00176-0

Cited by 72 publications

(48 citation statements)

References 9 publications

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“…The modified Sanchez-Lacombe equation of state (MSL-EOS) [18,19] was selected for the calculation because it was able to qualitatively represent the phase boundaries for the binary polyethylene + n-alkane systems [19] that make up the extrema of the blended polyethylene solutions.…”

Section: Objectivesmentioning

confidence: 99%

“…The modified Sanchez-Lacombe equation of state (MSL-EOS) [18,19] is a lattice fluid equation of state that can be used to calculate polydisperse polymer solutions. The modified Sanchez-Lacombe (MSL) equation of state uses a residual Helmholtz energy obtained by integrating the original pressure expression with respect to an ideal gas [18].…”

Section: The Modified Sanchez-lacombe Equation Of State (Msl-eos)mentioning

confidence: 99%

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Modelling the fluid phase behaviour of polydisperse polyethylene blends in hydrocarbons using the modified Sanchez–Lacombe equation of state

Krenz

Heidemann

2007

Fluid Phase Equilibria

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Section: Objectivesmentioning

confidence: 99%

Section: The Modified Sanchez-lacombe Equation Of State (Msl-eos)mentioning

confidence: 99%

Modelling the fluid phase behaviour of polydisperse polyethylene blends in hydrocarbons using the modified Sanchez–Lacombe equation of state

Krenz

Heidemann

2007

Fluid Phase Equilibria

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“…The fugacity coefficient can be extracted from the Sanchez-Lacombe equation of state. Its analytic expression is the following [14]: Experimental and calculated vapour pressure of pure H 2 S. Experimental data are from the DIPPR database [8].…”

Section: Solubility Modellingmentioning

confidence: 99%

Solubility and Diffusion Coefficient of Hydrogen Sulphide in Polyethylene Glycol 400 from 100 to 140°C

Ferrando

Mougin

Defiolle

et al. 2008

Oil & Gas Science and Technology - Rev. IFP

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Résumé -Solubilité et coefficient de diffusion du sulfure d'hydrogène dans le polyéthylène glycol 400 de 100 à 140 ºC -La limitation des rejets de gaz à effet de serre et de gaz acides, comme le sulfure d'hydrogène, est désormais une préoccupation majeure lors de la conception de procédés industriels. Dans ce contexte, Clauspol ® est un procédé de traitement des gaz de queue du Claus qui répond à ce besoin en atteignant des taux de récupération en soufre élevés. Il consiste à convertir chimiquement H 2 S et SO 2 en soufre élémentaire dans un solvant composé de polyéthylène glycol 400. L'optimisation de ce procédé requiert une connaissance précise de la solubilité et de la diffusivité des gaz dans ce solvant. Ainsi, ce travail présente dans le cas de H 2 S des mesures expérimentales de ces grandeurs et leur modélisation dans les conditions opératoires du procédé. Les données de solubilité sont modélisées avec l'équation d'état de Sanchez-Lacombe avec un simple coefficient d'interaction binaire indépendant de la température. Les coefficients de diffusion sont déterminés en appliquant le modèle Infinite-Acting sur la courbe expérimentale de la chute de pression. Ils apparaissent être inversement proportionnels à la viscosité du solvant. Abstract -Solubility and Diffusion Coefficient of Hydrogen Sulphide in Polyethylene Glycol 400 from 100 to 140°C -The limitation of greenhouse and sour gas emissions in the atmosphere, such as hydrogen sulphide, is nowadays a major preoccupation in industrial processes. In this context, the

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“…Solubility experimental data were represented by a Sanchez Lacombe equation of state [22,23] by using the expression of the fugacity coefficients of a component in the mixture proposed by Neau [24]. The pure characteristic parameters of each component were taken as indicated in Table 2.…”

Section: Evolution Of Viscosity Of the Mixturementioning

confidence: 99%

Capillary rheometry of a binary mixture polymer/CO2 in a single screw extruder

Common

Sauceau

Rodier

et al. 2015

Chemical Engineering and Processing: Process Intensification

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A B S T R A C TProcessing bio sourced polymers with supercritical fluids is a promising route towards new green engineering processes. Supercritical carbon dioxide (sc CO 2 ), is soluble in large quantities in molten polymers, where it acts as plasticizer and swelling agent. It is used, in blending or foaming of polymers, particle formation and polymerisation process.The process of hot melt extrusion assisted by sc CO 2 allowed the development of an on line viscosity measurement based on capillary rheometry. Applied to a bio sourced polyamide, it was validated by comparison with a classic capillary rheometer. Both data sets were in good agreement.A pseudoplastic fluid behaviour was observed with a 30 % viscosity decrease from 46 to 32 Pa s at 5000 s 1 and 220 C, upon addition of CO 2 . However, viscosity decreased to a plateau before reaching the thermodynamic solubility. The comparison with a model coupling solubility and flow allowed to identify the method limitations, which were attributed to the kinetics of dissolution and mixing. The higher the shear stress, the higher the amount of CO 2 at which the viscosity plateau is reached. These measurements may quantify the impact of the CO 2 on the rheology of the system but also of the efficiency of the mixing process in our experimental setup.

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A consistent method for phase equilibrium calculation using the Sanchez–Lacombe lattice–fluid equation-of-state

Cited by 72 publications

References 9 publications

Modelling the fluid phase behaviour of polydisperse polyethylene blends in hydrocarbons using the modified Sanchez–Lacombe equation of state

Modelling the fluid phase behaviour of polydisperse polyethylene blends in hydrocarbons using the modified Sanchez–Lacombe equation of state

Solubility and Diffusion Coefficient of Hydrogen Sulphide in Polyethylene Glycol 400 from 100 to 140°C

Capillary rheometry of a binary mixture polymer/CO2 in a single screw extruder

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