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Predict C 2 H 6 Concentration in Aqueous Solution Equilibrium with Its Hydrate in the Absence of Vapor
Author(s) -
GENG Lantao,
SUN Rui,
LU Wanjun
Publication year - 2013
Publication title -
acta geologica sinica ‐ english edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.444
H-Index - 61
eISSN - 1755-6724
pISSN - 1000-9515
DOI - 10.1111/1755-6724.12150_4
Subject(s) - christian ministry , library science , china , tectonics , petroleum , citation , geology , geochemistry , operations research , political science , computer science , engineering , law , paleontology
concentration of C2H6 in pure water and NaCl solutions equilibrium with its hydrate in the absence of vapor. Van der Waals & Platteeuw model and Holder’s model were used to calculate the chemical potential of components in hydrate and water, Pitzer’s model was used to calculate the activity of water in the solution. C2H6 concentration in water (Table 1) along the H-Lw-V equilibrium curve (Figure 1), and at two-phase equilibrium of H-Lw in pure water from 5 bar to 1000 bar, and in NaCl solutions (m NaCl= 0.598 mol/kg) from 5 bar to 15 bar, from 273.15 K to 287.1 K were predicted (Figures 2, 3, 4). The results show that, in equilibrium with hydrate in the absence of vapor: (1) Concentration of C2H6 increases with increasing temperature and decreasing pressure (Figure 3), (2) GENG Lantao, SUN Rui and LU Wanjun, 2013. Predict C2H6 Concentration in Aqueous Solution Equilibrium with Its Hydrate in the Absence of Vapor. Acta Geologica Sinica (English Edition), 87(supp.): 991-992.