Compositional data calculation of vapor–aqueous–hydrate systems in batch operations by a new algorithm

Tavasoli, Hamed; Feyzi, Farzaneh

doi:10.1016/j.jngse.2015.04.003

Cited by 6 publications

(2 citation statements)

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“…(6). As explained in our previous work [12], multi-layered cavity method introduced by Ballard [65] is a proper method to calculate Langmuir constants. This approach is effective for heavy hydrate formers because nonsphericity of the cavity is considered and the guest molecules fit better in the certain orientations within the cavity.…”

Section: Thermodynamic Modeling Of the Hydrate Phasementioning

confidence: 99%

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Four phase hydrate equilibria of methane and carbon dioxide with heavy hydrate former compounds: Experimental measurements and thermodynamic modeling

Tavasoli

Feyzi

2016

Korean J. Chem. Eng.

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We experimentally investigated the hydrate dissociation condition for four phase hydrate (H)-aqueous liquid (L Aq )-hydrocarbon rich liquid (L HC )-vapor (V) for the ternary systems of help gas-heavy hydrate former-water. Methane and carbon dioxide are known as help gases and benzene and cyclohexane are considered as heavy hydrate formers. The experimental data were generated using an isochoric pressure-search method. Two different equations of state (EOS) were employed to study the equilibrium phase behavior of ternary four phase systems. The EOSs considered are Valderama-Patel-Teja EOS combined with non-density dependent mixing rule (VPT+NDD) and Statistical Associating Fluid Theory EOS proposed by Huang and Radosz (SAFT-HR). The required binary interaction parameters (BIP) were obtained using vapor-liquid equilibrium (VLE) and liquid-liquid equilibrium (LLE) data. The hydrate phase was modeled by the modification of the solid solution theory of van der Waals and Platteeuw. To obtain reliable results, distortion of cages due to occupation of large molecules was considered. The Kihara parameters of cyclohexane were adjusted to hydrate dissociation data. Model calculations for hydrate forming conditions were found to be in satisfactory agreement with the newly reported data in this work and literature data.

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Section: Thermodynamic Modeling Of the Hydrate Phasementioning

confidence: 99%

“…Several research works have been performed considering gas hydrates as unwelcomed phenomena and there are also the topics which have tried to apply gas hydrate properties in different fields of application to favor it [1,12]. To consider gas hydrates as a technological…”

Section: Introductionmentioning

confidence: 99%