A general correlation of vapor‐liquid equilibria in hydrocarbon mixtures

Chao, Kwang‐Chu; Seader, J. D.

doi:10.1002/aic.690070414

Cited by 184 publications

(90 citation statements)

References 17 publications

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“…The quantity ϕ i (1) similarly depends only on reduced temperature and reduced pressure and was fitted by Chao and Seader (1961): (7) log . .…”

Section: The Pure Liquid Fugacity Coefficientmentioning

confidence: 99%

“…(Grayson and Streed, 1963) The quantity ϕ i (0) depends only on reduced temperature and reduced pressure. It was fitted with the following function by Chao and Seader (1961): (6) where T r and P r are the reduced temperature and pressure of the component at hand. Coefficients for Equation (6) were determined by Grayson and Streed (1963) and they are presented in Table 1.…”

Section: The Pure Liquid Fugacity Coefficientmentioning

confidence: 99%

“…coefficient is derived in terms of the compressibility factor Z following the standard procedure (Chao and Seader, 1961):…”

Section: Fugacity Coefficient In a Vapour Phasementioning

confidence: 99%

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Improving the Modeling of Hydrogen Solubility in Heavy Oil Cuts Using an Augmented Grayson Streed (AGS) Approach

Torres

Hemptinne

Мачин

2013

Oil Gas Sci. Technol. – Rev. IFP Energies nouvelles

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est souvent préconisée dans l'industrie pour calculer la solubilité de l'hydrogène dans des coupes pétrolières. Il se fait cependant que sa précision se dégrade rapidement pour les coupes lourdes. Une amélioration est proposée dans ce travail, basée sur l'ajout d'un terme de Flory dans le calcul du coefficient d'activité. L'étude de la solubilité de l'hydrogène dans les n-alcanes du n-C 7 au n-C 36 fait apparaître que la constante de Henry diminue avec la masse molaire. L'analyse de ce comportement suggère la présence d'une déviation entropique à l'idéalité non prise en compte dans le modèle des solutions régulières. L'utilisation d'une correction de Flory permet de garder l'aspect prédictif du modèle. Elle nécessite néanmoins un nouveau calage de certains paramètres de la corrélation d'origine pour l'hydrogène. Le modèle qui résulte se comporte mieux pour les composés lourds et aromatiques. La qualité du nouveau modèle de Grayson Streed Augmenté (GSA) est évaluée sur des données de solubilité d'hydrogène dans des coupes pétrolières issues de Cai et al. [Cai H.Y. et al. (2001) Fuel 80, 1055-1063 ainsi que Lin et al. [Lin H.M. et al. (1981) Ind. Eng. Chem. Process Des. Dev. 20, 2, 253-256]. L'importance de la caractérisation de ces coupes est mise en avant. Une analyse de sensibilité montre qu'une perturbation du paramètre de solubilité a un effet beaucoup plus important que pour les autres paramètres. Il en résulte qu'un grand soin doit être apporté au calcul de cette grandeur. La prédiction de la solubilité de l'hydrogène dans des fractions pétrolières lourdes et dans des charbons liquéfiés a été améliorée par rapport au modèle de Grayson Streed : une déviation absolue moyenne de 30 % est obtenue pour GSA, à comparer avec 55 % avec la méthode GS, avec les données utilisées dans un domaine de 80-380 °C et 6,3-258,9 bar. [Grayson H.G. and Streed C.W. (1963) 6th World Petroleum Congress, Frankfurt am Main, Germany, 19-26 June, pp. 169-181] Abstract -Improving the Modeling of Hydrogen Solubility in Heavy Oil Cuts Using an Augmented Grayson Streed (AGS) Approach -The Grayson Streed (GS) method

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“…The quantity ϕ i (1) similarly depends only on reduced temperature and reduced pressure and was fitted by Chao and Seader (1961): (7) log . .…”

Section: The Pure Liquid Fugacity Coefficientmentioning

confidence: 99%

Section: The Pure Liquid Fugacity Coefficientmentioning

confidence: 99%

See 1 more Smart Citation

Improving the Modeling of Hydrogen Solubility in Heavy Oil Cuts Using an Augmented Grayson Streed (AGS) Approach

Torres

Hemptinne

Мачин

2013

Oil Gas Sci. Technol. – Rev. IFP Energies nouvelles

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“…150-2500 psig (1)(2)(3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13)(14)(15)(16)(17), and a catalyst contact time of 0.5-1.5 h; up to 1.5 wt% hydro-…”

mentioning

confidence: 99%

Improvement of hydrogen solubility and entrainment in hydrocracker feedstocks. Final technical report

Kabadi¹

1997

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However, any opinions, findings, conclusions or recommendations DE-FG22-92MT92020.expressed herein are those of the author and do not necessarily reflect the views of DOE.The work on thermodynamic model for hydrogen solubility i n hydrocarbons and in hydrocracker feedstocks was performed by the graduate student Mr. Junjie Luo, and the gas solubility apparatus to measure solubility of hydrogen in hydrocarbons . ABSTRACTThe work on this project was initiated on September 1, 1992. The project consisted of two tasks: 1. Development of a thermodynamic model for hydrogen solubility in hydrocarbons and extension of this model to predict solubility of hydrogen in hydrocracker feedstocks at conditions similar to those of hydrocracking operations, and 2. Design and construction of a gas solubility apparatus to measure solubility of hydrogen in hydrocarbons and in hydrocracker feedstocks.The theoretical work proposed was fully accomplished by developing a sophisticated model for hydrogen solubility in hydrocarbons and in hydrocracker feedstocks at advanced temperatures and pressures. Two papers on this work have been submitted to the Journal, Industrial and Engineering Chemistry Research. Reviews of these articles are likely to be available shortly.The proposed experimental work ran into a number of obstacles, especially to get the original and newly designed on-line sampling technique to h c t i o n properly. A number of calibrations and tests for reproducibility were necessary to assure the accuracy of measured data. Although a very well designed gas solubility apparatus was built, not much tim&was left to generate sigmficant hydrogen solubility data. The p h are to use the apparatus in fbture to measure hydrogen solubility r data in liquid fuels to facilitate more efficient design of fie1 conversion systems. .. . PROJECT OBJECTIVES AND SCOPEThe objective of this project is to determine the conditions for the hydrogen-heavy oil feed preparation so as to optimize the yield of hydrocracking reactions. Proper contacting of hydrogen with heavy oil on the catalyst bed is necessary to improve the yields of the hydrocracking reactions.It is most desirable to have the necessary amount of hydrogen available either in the dissolved or in entrained state, so that hydrogen diffusion to the reaction site does not provide rate controlling resistance to the overd rates of hydrocracking reactions. This project proposes to measure solubility and entrainment data for hydrogen in heavy oils at conditions such as i n hydrocrackers, and investigate the improvement of these properties by usage of appropriate additives. Specifically, measurements will be canid out at temperatures up to 300 C and pressures up to 120 atmospheres.Correlations for solubility and entrainment kinetics will be developed fkom the measured data, and a method for estimating the yield of hydrocracking reactions using these correlations will be suggested. Exxon Research and Engineering Company will serve as private sector collaborator providing A&T w i t h test samples ...

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“…1. Each gas was charged from high pressure cylinder (1) and bombs (2, 3) to receiver tanks of 150cc (4,5,6). Mercury pump (150cc/stroke) (21) was utilized to compress the gases by injecting mercury into the receiver tanks.…”

Section: Apparatusmentioning

confidence: 99%

Measurements and Predictions of Multicomponent Vapor-Liquid Equilibria

Yorizane

Yoshimura

Masuoka

1972

Bull. Japan Petrol. Inst.

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Summary:Dew points were determined of the systems hydrogen + carbon monoxide + methane + carbon dioxide + propane and hydrogen + carbon monoxide + methane + carbon dioxide + n-butane point two sets of composition of propane-or n-butane-free quaternary gas mixtures were tested. The experimental results were treated as the vapor phase solubility of propane or n-butane into quaternary mixtures. The estimations of dew-point and vapor-liquid equilibrium constants were made by the from the experimental data.

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A general correlation of vapor‐liquid equilibria in hydrocarbon mixtures

Cited by 184 publications

References 17 publications

Improving the Modeling of Hydrogen Solubility in Heavy Oil Cuts Using an Augmented Grayson Streed (AGS) Approach

Improving the Modeling of Hydrogen Solubility in Heavy Oil Cuts Using an Augmented Grayson Streed (AGS) Approach

Improvement of hydrogen solubility and entrainment in hydrocracker feedstocks. Final technical report

Measurements and Predictions of Multicomponent Vapor-Liquid Equilibria

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