Extension of Pitzer CSP models for vapor pressures and heats of vaporization to long-chain hydrocarbons

Morgan, David L.; Kobayashi, Riki

doi:10.1016/0378-3812(94)87051-9

Cited by 71 publications

(48 citation statements)

References 58 publications

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“…Corresponding states models can be used to predict several equilibrium [8,[10][11][12][13][14][15][16] and transport properties [17,18] over broad temperature and pressure conditions. In spite of its mathematical simplicity, corresponding states, lies behind a strong theoretical basis and is able to produce very accurate predictions based on a small amount of experimental information.…”

Section: Corresponding Statesmentioning

confidence: 99%

Viscosity and Liquid Density of Asymmetric n-Alkane Mixtures: Measurement and Modeling

et al. 2005

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Viscosity and liquid density measurements were performed, at atmospheric pressure, in pure and mixed n-decane, n-eicosane, n-docosane, and n-tetracosane from 293.15 K (or above the melting point) up to 343.15 K. The viscosity was determined with a rolling ball viscometer and liquid densities with a vibrating U-tube densimeter. Pure component results agreed, on average, with literature values within 0.2% for liquid density and 3% for viscosity. The measured data were used to evaluate the performance of two models for their predictions: the friction theory coupled with the Peng-Robinson equation of state and a corresponding states model recently proposed for surface tension, viscosity, vapor pressure, and liquid densities of the series of n-alkanes. Advantages and shortcoming of these models are discussed.

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Section: Corresponding Statesmentioning

confidence: 99%

Viscosity and Liquid Density of Asymmetric n-Alkane Mixtures: Measurement and Modeling

et al. 2005

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“…The heats of sublimation, h sblm h vap ϩ h m ϩ h tr ; are calculated at the melting temperature of the pure component. The heat of vaporisation h vap is assessed using a correlation by Morgan and Kobayashi [17]. The pair interaction energy between two non-identical molecules is given by…”

Section: The Solid Phase Non-ideality-predictive Uniquacmentioning

confidence: 99%

Measurements and modelling of wax formation in diesel fuels

Coutinho

Dauphin

Daridon

2000

Fuel

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Wax formation in hydrocarbon fluids at low temperatures is one of the harassing problems faced by the petroleum industry. The prevention of wax formation, the production of diesels more resistant at low temperatures and the design of new and better additives requires a good understanding of the crystallisation behaviour of the paraffin molecules. Better experimental techniques to study the wax formation and reliable thermodynamical models, able to predict the solid-liquid equilibrium of petroleum fluids, would help to prevent and overcome many of the problems associated with wax deposition.Here, an equilibrium cell previously used with synthetic mixtures is applied to study the influence of the desulphuration on the low temperature behaviour of a Petrogal diesel. The compositions of the solid and liquid phases in equilibrium and the fraction of solids in partly crystallised solutions were measured between Ϫ5 and Ϫ20ЊC. The latter was also measured by DSC. The experimental data was modelled using the Predictive UNIQUAC model. It is shown that the model provides an excellent description of the measured phase behaviour for these diesels. The desulphuration of the diesel seems to make it slightly heavier and to increase its wax appearance temperature (WAT). ᭧

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“…The only experimental information required from the target fluid are the critical properties and the Pitzer acentric factor. The application of corresponding states models extends from equilibrium properties such as vapor pressure [24][25][26][27][28], liquid density [26,[28][29][30], or surface tension [31][32][33][34][35][36].…”

Section: Corresponding States Theorymentioning

confidence: 99%

Corresponding states theory for the prediction of surface tension of ionic liquids

Mousazadeh

Faramarzi

2011

Ionics

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The surface tension of ionic liquids is studied according to phenomenological scaling and the law of corresponding states. The reduced coordinates g*-T*, where g* represents the reduced surface tension and T* is the reduced temperature, are introduced for the prediction of the surface tension from the melting point up to boiling point. It has been shown that the correlation can be expressed as a unique straight-line plot with a linear correlation coefficient of 0.984 that requires only the melting and boiling point parameters and can predict the surface tension accurately.

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Extension of Pitzer CSP models for vapor pressures and heats of vaporization to long-chain hydrocarbons

Cited by 71 publications

References 58 publications

Viscosity and Liquid Density of Asymmetric n-Alkane Mixtures: Measurement and Modeling

Viscosity and Liquid Density of Asymmetric n-Alkane Mixtures: Measurement and Modeling

Measurements and modelling of wax formation in diesel fuels

Corresponding states theory for the prediction of surface tension of ionic liquids

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