Prediction of VL and VLL equilibria of mixtures containing petroleum reservoir fluids and methanol with a cubic EoS

Avlonitis, Dimitrios; Danesh, Ali; Todd, Adrian Christopher

doi:10.1016/0378-3812(94)87057-8

Cited by 142 publications

(247 citation statements)

References 106 publications

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“…Albeit simple form of ANDD, it attempts to account for polar interactions in hydrate system, which reinforce a CEOS to give more realistic predictions at high pressures. In this respect, Avlonitis et al (1994) made similar observation. They pointed out effectiveness of ANDD for modeling phase behavior of hydrocarbon systems in the presence of methanol and water.…”

Section: Resultssupporting

confidence: 67%

“…To highlight this neglected point, in this section, we revisit most important works which have ever been carried out on this subject. Mohammadi and Richon (2007) applied ValderramaPatel-Teja EOS (VPT-EOS) in combination with nondensity dependent (ANDD for short) mixing rule proposed by Avlonitis et al (1994) to predict the phase equilibrium boundaries of hydrate system containing methane and ethylene glycol. In their work, P-T diagram of hydrate equilibria was accurately predicted up to ethylene glycol of 50 wt%.…”

Section: Literature Surveymentioning

confidence: 99%

“…As mentioned in preceding section, vdW rule is restricted to nonpolar mixtures. In an effort to accounting polar mixtures, Avlonitis et al (1994) proposed a novel mixing rule for mixtures containing polar (asymmetric) components as follows:…”

Section: Avlonitis Non-density Dependent (Andd) Mixing Rulementioning

confidence: 99%

“…To derive an expression for a A , Avlonitis et al (1994) supposed that increasing temperature alleviates asymmetric interactions. Additionally, at higher temperatures, mixture of mostly same components will behave similar to symmetric one.…”

Section: Avlonitis Non-density Dependent (Andd) Mixing Rulementioning

confidence: 99%

“…Simply put, if a mixture is totally composed of polar and asymmetric species, a A will be zero. Based on these hypotheses, Avlonitis et al (1994) suggested the following expression:…”

Section: Avlonitis Non-density Dependent (Andd) Mixing Rulementioning

confidence: 99%

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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.

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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.

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Section: Resultssupporting

confidence: 67%

Section: Literature Surveymentioning

confidence: 99%

Section: Avlonitis Non-density Dependent (Andd) Mixing Rulementioning

confidence: 99%

Section: Avlonitis Non-density Dependent (Andd) Mixing Rulementioning

confidence: 99%

“…Simply put, if a mixture is totally composed of polar and asymmetric species, a A will be zero. Based on these hypotheses, Avlonitis et al (1994) suggested the following expression:…”

Section: Avlonitis Non-density Dependent (Andd) Mixing Rulementioning

confidence: 99%

See 3 more Smart Citations

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.

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An investigation of gas hydrates formation energetics

Avlonitis

2005

AIChE Journal

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Carbon monoxide clathrate hydrates: Equilibrium data and thermodynamic modeling

2005

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in Wiley InterScience (www.interscience.wiley.com). 2 and CH 4 hydrates. Data for Carbon monoxide occurs in abundance throughout the cosmos, potentially in clathrate form, whereas on Earth, it forms a notable constituent of industrial flue gases. It has been proposed that hydrate technology could be used in CO 2 separation from flue gases, and in subsea flue gas CO 2 disposal. This-and the likely widespread occurrence of CO clathrates in the cosmos-means it is important that the phase behavior of CO hydrates is known. Here, we present experimental H-L-V (hydrate-liquid-vapor) equilibrium data for CO, CO-CO 2 , and CO-C 3 H 8 (propane) clathrate hydrates. Data were generated by a reliable step-heating technique validated using measured data for CO IntroductionGas hydrates, or clathrate hydrates, are a group of nonstoichiometric, icelike crystalline compounds formed through a combination of water and suitably sized "guest " molecules under low-temperature and elevated pressure conditions. In the clathrate lattice, water molecules form hydrogen-bonded cagelike structures, encapsulating the guest molecules, which generally consist of low molecular diameter gases and organic compounds. A concise review of gas hydrates is given by Sloan. 1 Alongside molecular hydrogen and water, carbon monoxide is one of the most abundant molecules in the cosmos. It is found in solid, gaseous, and potentially clathrate hydrate forms throughout the galaxy, either in interstellar gas clouds, or as a component of comets and planetary bodies. [2][3][4] In the terrestrial environment, CO forms a notable constituent of flue and other exhaust gases resulting from the combustion of organic materials.Recently, hydrate technology has been proposed as a means for CO 2 separation from industrial flue gases. 5 Carbon monoxide is a common component of such gases, and thus its effects on hydrate equilibria should be considered in process design. Similarly, any CO present in CO 2 destined for proposed hydrate sequestration schemes 6,7 will also influence the phase behavior. These factors, and the potential widespread abundance of CO clathrates in the cosmos, warrant an improved understanding of CO clathrate hydrate equilibria.Currently, only very limited data are available in the literature concerning CO hydrates. Carbon monoxide is similar in molecular size to oxygen and nitrogen. Given that both O 2 and N 2 can form simple (single guest) gas hydrates, it was proposed in the 1960s that carbon monoxide should also form clathrates. 2,8,9 In the absence of experimental data, Miller 3 and 4 however, using the classical Lennard-Jones-Devonshire (LJD) cell model (with cell parameters apparently modified from those of nitrogen hydrates), concluded that structure I would be the more stable structure for carbon monoxide, giving a dissociation pressure around 20% lower than that for structure II at the same temperature. Davidson et al. 10 subsequently resolved this issue through low-temperature X-ray powder diffraction studies, which demonstrated that ...

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Prediction of VL and VLL equilibria of mixtures containing petroleum reservoir fluids and methanol with a cubic EoS

Cited by 142 publications

References 106 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

An investigation of gas hydrates formation energetics

Carbon monoxide clathrate hydrates: Equilibrium data and thermodynamic modeling

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