General friction theory viscosity model for the PC‐SAFT equation of state

Quiñones-Cisneros, Sergio E.; Zéberg-Mikkelsen, Claus K.; Fernández, Josefa; Garcı́a, Josefa

doi:10.1002/aic.10755

Cited by 82 publications

(87 citation statements)

References 64 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The dilute gas viscosity of the mixtures has been estimated by the mixing rule proposed in [38]. This mixing rule is a function of the composition and the dilute gas viscosity of the pure compounds.…”

Section: The Free-volume Theorymentioning

confidence: 99%

Stereoisomeric effects on dynamic viscosity versus pressure and temperature for the system cis-+trans-decalin

Miyake¹,

Boned²,

Baylaucq³

et al. 2007

Chemical Physics

Self Cite

View full text Add to dashboard Cite

Section: The Free-volume Theorymentioning

confidence: 99%

Stereoisomeric effects on dynamic viscosity versus pressure and temperature for the system cis-+trans-decalin

Miyake¹,

Boned²,

Baylaucq³

et al. 2007

Chemical Physics

Self Cite

View full text Add to dashboard Cite

“…The most usual models to perform this task over broad pressure ranges are based on the freevolume concept, [33][34][35] the hard-sphere (Enskog) theory, [36][37][38][39] reaction rate theory, 40 or a friction model. 41,42 Other methods used to calculate viscosity based on molecular theory [43][44][45][46][47][48] (molecular simulation and QSPR methods) are not yet competitive for the studied systems. In this work, we have verified the prediction ability of the self-referencing method, the hard-sphere model, and the free-volume model.…”

Section: Introductionmentioning

confidence: 99%

High‐pressure viscosity and density of carbon dioxide + pentaerythritol ester mixtures: Measurements and modeling

et al. 2008

View full text Add to dashboard Cite

This article reports densities and viscosities up to 60 MPa and from 303.15 to 353.15 K on two binary mixtures of CO 2 and lubricant pentaerythritol tetra-2-ethylhexanoate with 7.8% and 14.4% mass fraction of lubricant. Because CO 2 and the lubricant are not in the same phase at atmospheric pressure and room temperature, a specially-designed vibrating-wire apparatus has been used. The experimental data, together with our previous data for six mixtures of CO 2 and three polyolesters, have been used to test the predictive and correlation ability of several models: simple mixing laws, the self-referencing method, and the hard-sphere and free volume models. In general, it is not possible to predict the viscosity with deviations smaller than 10%. The hard-sphere model and the self-referencing model are the more adequate to represent the viscosity of these mixtures. Most of the models studied underestimate the viscosities over the investigated (T,p) range.

show abstract

“…Previous work [96,97] has indicated f-theory gives accurate viscosity predictions at pressures up to 100 MPa when the friction coefficients  a ,  aa ,  r , and  rr are defined as exponential functions of reduced temperature. F-theory has been successfully used when the P a and P r inputs to Equation 32 is calculated using the PR, SRK, and PC-SAFT equations.…”

Section: Frictional Theory Of Viscosity (F-theory)mentioning

confidence: 99%

“…The two theories evaluated in this research that have shown great promise with regard to the accurate modeling of viscosity at both low pressures and HTHP conditions are the frictional theory (f-theory) [96,97] and the free volume theory (FV theory) of viscosity [98,99]. Detailed equations for both theories are provided in Appendix B.…”

Section: Frictional Theory (F-theory) and Free Volume Theory (Fv Theory)mentioning

confidence: 99%

“…Collectively, the friction parameters given in Equations 33-37 are a function of 38 model constants, which are obtained by modeling after smoothed experimental viscosity values for normal alkanes ranging in carbon number from 1 to 18. The interested reader is referred to the literature for their definition [97].…”

Section: Frictional Theory Of Viscosity (F-theory)mentioning

confidence: 99%

See 1 more Smart Citation

An Assessment of Research Needs Related to Improving Primary Cement Isolation of Formations in Deep Offshore Wells

Tapriyal¹,

Enick²,

McHugh³

et al. 2012

View full text Add to dashboard Cite

The National Energy Technology Laboratory (NETL) conducts cutting-edge energy research and technology development and analyzes energy systems and international energy issues for the U.S. Department of Energy. The NETL-Regional University Alliance (NETL-RUA) is an applied research collaboration that combines NETL's energy research expertise with the broad capabilities of five nationally recognized, regional universities: Carnegie Mellon University (CMU), The Pennsylvania State University (PSU), the University of Pittsburgh (Pitt), Virginia Tech, and West Virginia University (WVU), and the engineering and construction expertise of an industry partner (URS). The NETL-RUA leverages its expertise with current fossil energy sources to discover and develop sustainable energy systems of the future, introduce new technology, and boost economic development and national security. Cover Illustration:The image provides an inside view of the density cell, which is capable of getting density data at 500°F and 35,000 psi. The left side image shows the bubble point of the gas. The tiny bubbles can be seen at the top center of the cell. The middle image shows the liquid-liquid-gas equilibrium phase exhibiting two liquid phases at the bottom and in the middle sections as well as a gas phase at the top. The right side image shows the solid formation as the pressure is increased.

show abstract

General friction theory viscosity model for the PC‐SAFT equation of state

Abstract: In this work, a general f-theory viscosity model based on the perturbed-chain statistical associating fluid theory (PC-SAFT) equation of state (EoS

Cited by 82 publications

References 64 publications

Stereoisomeric effects on dynamic viscosity versus pressure and temperature for the system cis-+trans-decalin

Stereoisomeric effects on dynamic viscosity versus pressure and temperature for the system cis-+trans-decalin

High‐pressure viscosity and density of carbon dioxide + pentaerythritol ester mixtures: Measurements and modeling

An Assessment of Research Needs Related to Improving Primary Cement Isolation of Formations in Deep Offshore Wells

Contact Info

Product

Resources

About