http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
new comprehensive semiempirical approach to calculate three-phase water/hydrocarbons equilibria
(1995). These data include two ternary systems of n-
A new comprehensive semiempirical approach (CSA) has been
algorithm that allows the user to tune the input parameters,
been used to run the data from Billman (1989) and Beladi
compositions are different, and one ternary system of n-
considers mutual solubility between water and hydrocarbons.
data and yi tuning value. They all matched each other in
data has been tuned to satisfy the following material balance
decane/n-pentadecane/water. The vapor phase composition (yi)
developed to calculate three-phase water/hydrocarbons
equation: [] The approachhas been verified by comparing
equilibria. It uses both laboratory data (stagewise
from 0.62 to 60.6%. The oleic phase composition can be used
heptane/n-dodecane/water, for which their initial overall
higher the vapor-oleic three-phase K-values are. The aqueous
hydrocarbons in the aqueous phase is insignificant,
i.e. vapor phase composition (vi). In this study, the CSA has
is also shown that the lighter the hydrocarbon component, the
isochoric distillation data) and Peng-Robinson EOS. It
neglected. It is shown in this study that vapor-oleic three-
of the systems. The CSA also includes a self-tuning
phase composition in this study shows that solubility of
phase K-values are slightly dependent upon composition. It
some range of data uncertainty. The data uncertainty ranges
the calculated vapor phase composition (yi calc ) with yi
The CSA calculates phase equilibria by applying the
thermodynamic equalities between phases and material balance
to show that solubility of water in oleic phase cannot be
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