A new apparatus for the study of high-pressure phase equilibria at low temperatures using an analytical method was designed, assembled and tested. The apparatus was specially developed for the study of multi-phase equilibria in systems containing hydrocarbons, water and hydrate inhibitors, at temperatures ranging from 213 K to 353 K and pressures up to 40 MPa. The core of the apparatus is a variable-volume equilibrium cell, equipped with a 360 degree sapphire window and connected to an analytical system by three capillary samplers. The quality of the apparatus was confirmed through several tests, including the study of the system methane + water. An equilibrium point for the quaternary system methane + n-hexane + methanol + water is also presented.
Compounds
#
Formula
Name
1
CH4
methane
2
H2O
water
Datasets
The table above is generated from the ThermoML associated json file (link above).
POMD and RXND refer to PureOrMixture and Reaction Datasets. The compound numbers are included in properties, variables, and phases, if specificied;
the numbers refer to the table of compounds on the left.