A generalized Patel-Teja equation of state for polar and nonpolar fluids and their mixtures.

Valderrama, José O.

doi:10.1252/jcej.23.87

Cited by 261 publications

(240 citation statements)

References 10 publications

Supporting

Mentioning

235

Contrasting

Unclassified

Order By: Relevance

“…Figure 4c supports this observation through erratic distribution of error% in varying pressures. This could be attributed to different origin of VPT which is a modified form of three-parameter PT-EOS (Valderrama 1990). Therefore, one could not expect similar trend between predictions of PR/SRK and VPT.…”

Section: Resultsmentioning

confidence: 93%

“…Although PT-EOS was a major improvement in area of CEOSs, nevertheless, unlike SRK or PR, it involves more complexity, that is, solving an additional three-degree polynomial to calculate Z c . To reduce complexity of original PT-EOS while maintaining its advantages, Valderrama (1990) proposed a generalized expression by considering the experimental values of Z c , given by:…”

Section: Valderrama-patel-teja Equation Of State (Vpt-eos)mentioning

confidence: 99%

See 1 more Smart Citation

New insight into prediction of phase behavior of natural gas hydrate by different cubic equations of state coupled with various mixing rules

Dehaghani

2017

Pet. Sci.

View full text Add to dashboard Cite

Progress in hydrate thermodynamic study necessitates robust and fast models to be incorporated in reservoir simulation softwares. However, numerous models presented in the literature makes selection of the best, proper predictive model a cumbersome task. It is of industrial interest to make use of cubic equations of state (EOS) for modeling hydrate equilibria. In this regard, this study focuses on evaluation of three common EOSs including Peng-Robinson, Soave-Redlich-Kwong and Valderrama-Patel-Teja coupled with van der Waals and Platteeuw theory to predict hydrate P-T equilibrium of a real natural gas sample. Each EOS was accompanied with three mixing rules, including van der Waals (vdW), Avlonitis non-density dependent (ANDD) and general nonquadratic (GNQ). The prediction of cubic EOSs was in sufficient agreement with experimental data and with overall AARD% of less than unity. In addition, PR plus ANDD proved to be the most accurate model in this study for prediction of hydrate equilibria with AARD% of 0.166. It was observed that the accuracy of cubic EOSs studied in this paper depends on mixing rule coupled with them, especially at high-pressure conditions. Lastly, the present study does not include any adjustable parameter to be correlated with hydrate phase equilibrium data.

show abstract

Section: Resultsmentioning

confidence: 93%

Section: Valderrama-patel-teja Equation Of State (Vpt-eos)mentioning

confidence: 99%

New insight into prediction of phase behavior of natural gas hydrate by different cubic equations of state coupled with various mixing rules

Dehaghani

2017

Pet. Sci.

View full text Add to dashboard Cite

show abstract

“…They are: Redlich-Kwong (RK;Redlich and Kwong, 1949), Soave-Redlich-Kwong (SRK;Soave, 1972), Soave-van der Waals (SVDW;Soave, 1984), Peng-Robinson (PR;Peng and Robinson, 1976), Patel-Teja (PT;Patel and Teja, 1982), Patel-Teja-VC (PTVC;Valderrama and Cisternas, 1986), and Patel-TejaValderrama (PTV;Valderrama, 1990). All these EOS can be expressed by the following general expression:…”

Section: Presentation Of the Equationsmentioning

confidence: 99%

Liquid Volumes from Generalized Cubic Equations of State: Take It with Care

Valderrama

Alfaro

2000

Oil & Gas Science and Technology - Rev. IFP

View full text Add to dashboard Cite

show abstract

“…This software makes use of the Valderrama modification of the Patel-Teja equation of state [Valderrama, 1990] to calculate the hydrate phase boundary for a range of hydrate structures, hydrateforming molecules, inhibitors, and salinities [e.g., Tohidi et al, 1995]. Our models assume hydrostatic pressure, which is generally acceptable for the uppermost few hundred meters of sediment, where lithostatic pressure is minimal [Flemings et al, 2003], but it must be noted that some modeled HSZs extend below this boundary.…”

Section: Introductionmentioning

confidence: 99%

Defining the updip extent of the gas hydrate stability zone on continental margins with low geothermal gradients

Gorman¹,

Senger²

2010

J. Geophys. Res.

View full text Add to dashboard Cite

[1] The distribution of gas hydrate on a continental slope is often characterized as a wedge that pinches out on the seafloor. This part of the hydrate stability zone is particularly relevant for studies of the dynamics of hydrate accumulations, such as processes related to slope stability or hydrate dissociation leading to methane release into the overlying ocean. For regions with very low geothermal gradients, we have produced a series of thermobaric models of the shallow hydrate stability zone that contain an unexpected geometrical distribution of hydrated sediments. In these models, the shallowest part of the stability field thickens and bulges landward. Such a feature is more likely to happen in regions where low geothermal gradients are further lowered by high sedimentation rates. Also, the effect is greater beneath colder oceans. Although a hydrate stability zone bulge would be difficult to image with conventional seismic methods, there are numerous locations around the world where such a system could develop.Citation: Gorman, A. R., and K. Senger (2010), Defining the updip extent of the gas hydrate stability zone on continental margins with low geothermal gradients,

show abstract

A generalized Patel-Teja equation of state for polar and nonpolar fluids and their mixtures.

Cited by 261 publications

References 10 publications

New insight into prediction of phase behavior of natural gas hydrate by different cubic equations of state coupled with various mixing rules

New insight into prediction of phase behavior of natural gas hydrate by different cubic equations of state coupled with various mixing rules

Liquid Volumes from Generalized Cubic Equations of State: Take It with Care

Defining the updip extent of the gas hydrate stability zone on continental margins with low geothermal gradients

Contact Info

Product

Resources

About