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A Model for Systems with Soluble Hydrate Formers
Author(s) -
JAGER M. D.,
DE DEUGD R. M.,
PETERS C. J.,
DE SWAAN ARONS J.,
SLOAN E. D.
Publication year - 2000
Publication title -
annals of the new york academy of sciences
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.712
H-Index - 248
eISSN - 1749-6632
pISSN - 0077-8923
DOI - 10.1111/j.1749-6632.2000.tb06845.x
Subject(s) - hydrate , chemistry , clathrate hydrate , thermodynamics , van der waals force , methane , phase (matter) , 1,4 dioxane , organic chemistry , molecule , physics
A bstract : The objective of this study was to measure and model hydrate phase equilibria in a system containing a water‐soluble hydrate former. The system investigated is methane + water + 1,4‐dioxane in the pressure range between 2 and 14 MPa. Experimental results show that the stability of hydrates is a strong function of 1,4‐dioxane concentration in the water phase. The hydrate phase equilibria data are modeled using the van der Waals and Platteeuw theory assuming that 1,4‐dioxane is a soluble sII former. Activity coefficients of the liquid phase can be calculated from water + 1,4‐dioxane vapor liquid equilibria. Under these assumptions, the predicted equilibrium pressures are within 5% of the experimental data up to a concentration of 20 mol% 1,4‐dioxane relative to water.